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  Subjects -> ENGINEERING (Total: 2254 journals)
    - CHEMICAL ENGINEERING (190 journals)
    - CIVIL ENGINEERING (177 journals)
    - ELECTRICAL ENGINEERING (99 journals)
    - ENGINEERING (1198 journals)
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    - MECHANICAL ENGINEERING (89 journals)

ENGINEERING (1198 journals)            First | 1 2 3 4 5 6 | Last

Showing 401 - 600 of 1205 Journals sorted alphabetically
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 11)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
IET Radar, Sonar & Navigation     Hybrid Journal   (Followers: 24)
IET Renewable Power Generation     Hybrid Journal   (Followers: 9)
IET Science, Measurement & Technology     Hybrid Journal   (Followers: 2)
IET Signal Processing     Hybrid Journal   (Followers: 14)
IETE Journal of Research     Open Access   (Followers: 8)
IETE Technical Review     Open Access   (Followers: 6)
IIE Transactions     Hybrid Journal   (Followers: 2)
Implementation Science     Open Access   (Followers: 12)
Indian Journal of Biotechnology (IJBT)     Open Access   (Followers: 2)
Industrial Data     Open Access   (Followers: 1)
Industrie et Technologies     Full-text available via subscription   (Followers: 17)
Informatik-Spektrum     Hybrid Journal   (Followers: 1)
Ingeniare : Revista Chilena de Ingenieria     Open Access  
Ingenieria     Open Access  
Ingeniería     Open Access  
Ingenieria de Recursos Naturales y del Ambiente     Open Access  
Ingeniería e Investigación     Open Access  
Ingeniería Energética     Open Access  
Ingenieria Industrial. Actualidad y Nuevas Tendencias     Open Access  
Ingeniería solidaria     Open Access  
Ingenieria y Ciencia     Open Access  
Ingeniería y Desarrollo     Open Access  
Ingenieria y Universidad     Open Access  
Ingeniería, Investigación y Tecnología     Open Access  
Ingenius : Revista de Ciencia y Tecnología     Open Access  
Innovare : Revista de ciencia y tecnología     Open Access  
Instrumentation Science & Technology     Hybrid Journal   (Followers: 7)
Integration, the VLSI Journal     Hybrid Journal   (Followers: 6)
Intelligent Control and Automation     Open Access   (Followers: 5)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 7)
Interface Science and Technology     Full-text available via subscription  
Intermetallics     Hybrid Journal   (Followers: 23)
International Archives of Science and Technology     Open Access  
International Communications in Heat and Mass Transfer     Hybrid Journal   (Followers: 14)
International conference KNOWLEDGE-BASED ORGANIZATION     Open Access  
International Heat Treatment and Surface Engineering     Hybrid Journal   (Followers: 3)
International Journal for Numerical Methods in Engineering     Hybrid Journal   (Followers: 29)
International Journal for Numerical Methods in Fluids     Hybrid Journal   (Followers: 19)
International Journal for Simulation and Multidisciplinary Design Optimization     Open Access   (Followers: 2)
International Journal for the History of Engineering & Technology     Hybrid Journal   (Followers: 7)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Adaptive Control and Signal Processing     Hybrid Journal   (Followers: 2)
International Journal of Adhesion and Adhesives     Hybrid Journal   (Followers: 16)
International Journal of Advancements in Technology     Open Access   (Followers: 1)
International Journal of Advances in Applied Sciences     Open Access   (Followers: 4)
International Journal of Advances in Engineering Sciences     Open Access   (Followers: 3)
International Journal of Advances in Engineering Sciences and Applied Mathematics     Hybrid Journal   (Followers: 1)
International Journal of Advances in Engineering, Science and Technology     Open Access   (Followers: 4)
International Journal of Aerodynamics     Hybrid Journal   (Followers: 14)
International Journal of Aerospace Innovations     Full-text available via subscription   (Followers: 16)
International Journal of Air-Conditioning and Refrigeration     Hybrid Journal   (Followers: 7)
International Journal of Antennas and Propagation     Open Access   (Followers: 8)
International Journal of Applied Ceramic Technology     Hybrid Journal   (Followers: 7)
International Journal of Applied Power Engineering     Open Access   (Followers: 4)
International Journal of Architectural Computing     Full-text available via subscription   (Followers: 4)
International Journal of Automation and Control Engineering     Open Access   (Followers: 2)
International Journal of Automotive Technology and Management     Hybrid Journal   (Followers: 5)
International Journal of Autonomic Computing     Hybrid Journal   (Followers: 1)
International Journal of Autonomous and Adaptive Communications Systems     Hybrid Journal   (Followers: 4)
International Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
International Journal of Bifurcation and Chaos     Hybrid Journal   (Followers: 2)
International Journal of Biomedical and Clinical Engineering     Full-text available via subscription   (Followers: 3)
International Journal of Biomedical Imaging     Open Access   (Followers: 5)
International Journal of Cast Metals Research     Hybrid Journal  
International Journal of Circuit Theory and Applications     Hybrid Journal   (Followers: 2)
International Journal of Coal Science & Technology     Open Access   (Followers: 1)
International Journal of Collaborative Engineering     Hybrid Journal  
International Journal of Combinatorics     Open Access   (Followers: 1)
International Journal of Communication Systems     Hybrid Journal   (Followers: 2)
International Journal of Computer Aided Engineering and Technology     Hybrid Journal  
International Journal of Computer Applications in Technology     Hybrid Journal   (Followers: 3)
International Journal of Control Science and Engineering     Open Access   (Followers: 5)
International Journal of Control, Automation and Systems     Hybrid Journal   (Followers: 12)
International Journal of Corrosion     Open Access   (Followers: 10)
International Journal of Crashworthiness     Hybrid Journal   (Followers: 7)
International Journal of Design Engineering     Hybrid Journal   (Followers: 14)
International Journal of Digital Multimedia Broadcasting     Open Access   (Followers: 5)
International Journal of Education and Management Engineering     Open Access   (Followers: 2)
International Journal of Education Economics and Development     Hybrid Journal   (Followers: 3)
International Journal of Embedded Systems     Hybrid Journal   (Followers: 5)
International Journal of Emerging Multidisciplinary Fluid Sciences     Full-text available via subscription   (Followers: 1)
International Journal of Energy Optimization and Engineering     Hybrid Journal   (Followers: 3)
International Journal of Engine Research     Hybrid Journal   (Followers: 1)
International Journal of Engineering & Technology     Open Access   (Followers: 4)
International Journal of Engineering and Manufacturing     Open Access   (Followers: 1)
International Journal of Engineering Education     Full-text available via subscription   (Followers: 6)
International Journal of Engineering Management and Economics     Hybrid Journal   (Followers: 3)
International Journal of Engineering Mathematics     Open Access   (Followers: 2)
International Journal of Engineering Pedagogy     Open Access  
International Journal of Engineering Practical Research     Open Access  
International Journal of Engineering Research in Africa     Full-text available via subscription   (Followers: 1)
International Journal of Engineering Science     Hybrid Journal   (Followers: 6)
International Journal of Engineering Systems Modelling and Simulation     Hybrid Journal   (Followers: 8)
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Engineering, Social Justice, and Peace     Open Access   (Followers: 5)
International Journal of Environmental Engineering     Hybrid Journal   (Followers: 6)
International Journal of Experimental Design and Process Optimisation     Hybrid Journal   (Followers: 5)
International Journal of Fatigue     Hybrid Journal   (Followers: 35)
International Journal of Flow Control     Full-text available via subscription   (Followers: 4)
International Journal of Foresight and Innovation Policy     Hybrid Journal   (Followers: 7)
International Journal of Fracture     Hybrid Journal   (Followers: 11)
International Journal of Geo-Engineering     Open Access  
International Journal of Geotechnical Engineering     Hybrid Journal   (Followers: 5)
International Journal of Grid and Utility Computing     Hybrid Journal  
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 31)
International Journal of Heat and Mass Transfer     Hybrid Journal   (Followers: 132)
International Journal of Heavy Vehicle Systems     Hybrid Journal   (Followers: 6)
International Journal of Hypersonics     Full-text available via subscription   (Followers: 4)
International Journal of Imaging Systems and Technology     Hybrid Journal   (Followers: 1)
International Journal of Impact Engineering     Hybrid Journal   (Followers: 9)
International Journal of Information Acquisition     Hybrid Journal   (Followers: 1)
International Journal of Innovation and Applied Studies     Open Access   (Followers: 5)
International Journal of Innovation Science     Full-text available via subscription   (Followers: 9)
International Journal of Innovative Technology and Research     Open Access   (Followers: 1)
International Journal of Integrated Engineering     Open Access  
International Journal of Intelligent Engineering Informatics     Hybrid Journal  
International Journal of Intelligent Systems and Applications in Engineering     Open Access   (Followers: 2)
International Journal of Lifecycle Performance Engineering     Hybrid Journal   (Followers: 1)
International Journal of Machine Tools and Manufacture     Hybrid Journal   (Followers: 5)
International Journal of Manufacturing Research     Hybrid Journal   (Followers: 6)
International Journal of Manufacturing Technology and Management     Hybrid Journal   (Followers: 8)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 4)
International Journal of Mathematical Education in Science and Technology     Hybrid Journal   (Followers: 8)
International Journal of Mathematics in Operational Research     Hybrid Journal  
International Journal of Medical Engineering and Informatics     Hybrid Journal   (Followers: 3)
International Journal of Micro Air Vehicles     Full-text available via subscription   (Followers: 7)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 3)
International Journal of Microwave Science and Technology     Open Access   (Followers: 4)
International Journal of Mobile Network Design and Innovation     Hybrid Journal   (Followers: 1)
International Journal of Multiphase Flow     Hybrid Journal   (Followers: 4)
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal   (Followers: 2)
International Journal of Nanotechnology     Hybrid Journal   (Followers: 5)
International Journal of Nanotechnology and Molecular Computation     Full-text available via subscription   (Followers: 2)
International Journal of Navigation and Observation     Open Access   (Followers: 18)
International Journal of Network Management     Hybrid Journal   (Followers: 1)
International Journal of Nonlinear Sciences and Numerical Simulation     Hybrid Journal  
International Journal of Numerical Methods for Heat & Fluid Flow     Hybrid Journal   (Followers: 9)
International Journal of Optics     Open Access   (Followers: 2)
International Journal of Organisational Design and Engineering     Hybrid Journal   (Followers: 6)
International Journal of Pattern Recognition and Artificial Intelligence     Hybrid Journal   (Followers: 6)
International Journal of Pavement Engineering     Hybrid Journal   (Followers: 4)
International Journal of Physical Modelling in Geotechnics     Hybrid Journal   (Followers: 4)
International Journal of Plasticity     Hybrid Journal   (Followers: 6)
International Journal of Plastics Technology     Hybrid Journal   (Followers: 1)
International Journal of Polymer Analysis and Characterization     Hybrid Journal   (Followers: 6)
International Journal of Polymer Science     Open Access   (Followers: 22)
International Journal of Precision Engineering and Manufacturing     Hybrid Journal   (Followers: 6)
International Journal of Precision Engineering and Manufacturing-Green Technology     Hybrid Journal  
International Journal of Precision Technology     Hybrid Journal  
International Journal of Pressure Vessels and Piping     Hybrid Journal   (Followers: 17)
International Journal of Production Economics     Hybrid Journal   (Followers: 13)
International Journal of Quality and Innovation     Hybrid Journal   (Followers: 5)
International Journal of Quality Assurance in Engineering and Technology Education     Full-text available via subscription   (Followers: 3)
International Journal of Quality Engineering and Technology     Hybrid Journal   (Followers: 2)
International Journal of Quantum Information     Hybrid Journal   (Followers: 2)
International Journal of Rapid Manufacturing     Hybrid Journal   (Followers: 4)
International Journal of Recent Contributions from Engineering, Science & IT     Open Access  
International Journal of Reliability, Quality and Safety Engineering     Hybrid Journal   (Followers: 11)
International Journal of Renewable Energy Technology     Hybrid Journal   (Followers: 9)
International Journal of Robust and Nonlinear Control     Hybrid Journal   (Followers: 4)
International Journal of Science Engineering and Advance Technology     Open Access  
International Journal of Sediment Research     Full-text available via subscription   (Followers: 3)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal   (Followers: 2)
International Journal of Service Science, Management, Engineering, and Technology     Full-text available via subscription   (Followers: 1)
International Journal of Signal and Imaging Systems Engineering     Hybrid Journal  
International Journal of Six Sigma and Competitive Advantage     Hybrid Journal   (Followers: 2)
International Journal of Social Robotics     Hybrid Journal   (Followers: 2)
International Journal of Software Engineering and Knowledge Engineering     Hybrid Journal   (Followers: 3)
International Journal of Space Science and Engineering     Hybrid Journal   (Followers: 4)
International Journal of Speech Technology     Hybrid Journal   (Followers: 7)
International Journal of Spray and Combustion Dynamics     Full-text available via subscription   (Followers: 12)
International Journal of Surface Engineering and Interdisciplinary Materials Science     Full-text available via subscription   (Followers: 1)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Engineering     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Manufacturing     Hybrid Journal   (Followers: 5)
International Journal of Systems and Service-Oriented Engineering     Full-text available via subscription  
International Journal of Systems Assurance Engineering and Management     Hybrid Journal  
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Technoethics     Full-text available via subscription   (Followers: 1)
International Journal of Technology Management and Sustainable Development     Hybrid Journal   (Followers: 1)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 6)
International Journal of Telemedicine and Applications     Open Access   (Followers: 3)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 13)
International Journal of Thermodynamics     Open Access   (Followers: 8)
International Journal of Turbo & Jet-Engines     Hybrid Journal   (Followers: 3)
International Journal of Ultra Wideband Communications and Systems     Hybrid Journal  
International Journal of Vehicle Autonomous Systems     Hybrid Journal  
International Journal of Vehicle Design     Hybrid Journal   (Followers: 6)
International Journal of Vehicle Information and Communication Systems     Hybrid Journal   (Followers: 2)
International Journal of Vehicle Noise and Vibration     Hybrid Journal   (Followers: 4)
International Journal of Vehicle Safety     Hybrid Journal   (Followers: 6)
International Journal of Vehicular Technology     Open Access   (Followers: 4)
International Journal of Virtual Technology and Multimedia     Hybrid Journal   (Followers: 3)
International Journal of Wavelets, Multiresolution and Information Processing     Hybrid Journal   (Followers: 1)
International Journal on Artificial Intelligence Tools     Hybrid Journal   (Followers: 5)
International Nano Letters     Open Access   (Followers: 6)
International Review of Applied Sciences     Open Access  

  First | 1 2 3 4 5 6 | Last

Journal Cover Engineering Journal
  [SJR: 0.269]   [H-I: 16]   [1 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 0125-8281 - ISSN (Online) 0125-8281
   Published by Chulalongkorn University Homepage  [1 journal]
  • Contribution of Asian Industries to Hazardous Substances Management and
           E-waste Recycling

    • Authors: Mizue Kama, Toshikazu Shiratori
      Pages: 1 - 10
      Abstract: The purpose of E-Waste recycling is resource recovery and hazardous substances management (HSM). However, academic literature that deals with the various social aspects of HSM is limited. As such, this paper focuses on the changes for labeling method, particularly those related to hazardous substance management, and discusses how and why the current mandatory methods have been adopted. We organized the historical information related to hazardous substance management among Asian manufactures prior to the introduction of EU’s RoHS Directive. In the EU, the RoHS Directive has been adopted in conjunction with the E-Waste recycling system. Initially, fulfillment of RoHS Directive requirements was confirmed through the probe assay of individual parts/products. However, Asian countries such as Japan, China and Thailand subsequently introduced product certification schemes that shared similarities with the CE mark, which had been developed as a necessary element of general supply chain management. These Asian certification schemes have played a leading role in RoHS Directive management in global manufacturing, a fact confirmed by the addition of RoHS2.0 to the EU’s CE mark requirements. Thus, it can be said that HSM in Asia has contributed to the establishment of a global standard in terms of entrance control. It is important to consider the future institutional recycling design in Asian region.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Production of Silicon Carbide Liquid Fertilizer by Hydrothermal
           Carbonization Processes from Silicon Containing Agricultural Waste Biomass
           

    • Authors: Mei-Yun Chang, Wu-Jang Huang
      Pages: 11 - 17
      Abstract: Wastes from agriculture or sewage systems have several properties, such as huge volume, high humidity, and high organic composition. According to past studies, sugarcane extract, peanut shells and rice husks have high silicon content. Chemical conversion of biomass feedstock will enhance usage and provide value to agricultural waste. In this research, we applied hydrothermal carbonization to convert silicon-rich waste biomass to produce silicon-doped liquid fertilizer. The experimental trial comprised five different treatments: the application of rice husks, peanut shells and sugarcane extract, silicon carbide fertilizer, water and soil without any additives. Concentrations used were 6% rice husk, peanut shells and sugarcane extract carbide liquid fertilizer, 30% water and 50% dried soil. The concentration effect of synthesized liquid on plant growth was compared. The statistical comparison showed that peanut shell application had a significant effect on cabbage seed germination and improved the plant’s growth rate when silicon carbide content was increased. When the content of silicon carbide in the liquid fertilizer was higher than 12%, crop growth was inhibited.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Eco-friendly Technologies for Physical and Chemical Recycling of
           PVC-Related Wasteful Resources

    • Authors: Hyoungsan Kye, Sejong Han, Jaemyung Han, Sukwon Hong, Donghyun Lee, Jong Wook Bae
      Pages: 19 - 27
      Abstract: The aim of this study is to enhance the recycled PVC related material property by formulation technology and develop the recycling product processing technology furthermore develop the chemical recycling technology for last stage of PVC wastes. The formulation technology is composed of pre-treatment (crushing, separation etc.) and post-treatment (material ratio, additives, stabilizer etc.) to enhance the recyclate property. The formulation for recycled PVC by application basis and processing technology is applied to produce the structural product for civil and construction application such as pipe fittings and water drainage cap for environmental waterway. Also chemical recycling technology for end life PVC scrap which causes environmental pollution by incineration or landfill is studied for producing hydrocarbon and hydrogen chloride for VCM.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Leaching and Adsorption of Gold from Waste Printed Circuit Boards Using
           Iodine-Iodide Solution and Activated Carbon

    • Authors: Batnasan Altansukh, Kazutoshi Haga, Narankhuu Ariunbolor, Shigeru Kawamura, Atsushi Shibayama
      Pages: 29 - 40
      Abstract: Iodine-iodide leaching and activated carbon adsorption processes for recovery of gold (Au) from waste printed circuit boards (WPCBs) were discussed in this paper. A pressure oxidative acid leaching (POAC) was carried out in an autoclave using diluted sulfuric acid (1M H2SO4) solution in order to remove high concentrations of some base metals especially copper (Cu), aluminum (Al), iron (Fe) and zinc (Zn) due to their negative effect on gold dissolution from WPCBs. The factors affecting the performance and efficiency of the iodine-iodide leaching process; such as iodine/iodide concentration, pulp density, leaching time and leaching temperature were optimized in order to maximize the gold dissolution efficiency from the WPCBs in the iodine-iodide solution. Results indicated that the vast majority (> 99%) of gold was dissolved in the solution from the WPCBs under the optimized leaching conditions. Adsorption tests were conducted on leach liquor solutions resulting from the iodine-iodide leaching using activated carbon. Nearly 98% of gold was adsorbed from the liquor solution onto the carbon under the condition optimized in this study. The results obtained revealed that gold can be successfully recovered from this secondary resources, where the percent recovery amounts to nearly 97% for gold.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Recovery of Fine Cassiterite from Tailing Dump in Jarin Tin Mine, Thailand

    • Authors: Somsak Saisinchai, Thitisak Boonpramote, Pinyo Meechumna
      Pages: 41 - 49
      Abstract: The beneficiation of cassiterite fines from tailing dumps in the Jarin Tin Mine, Thailand were studied through a wet concentration process and dry electrostatic and magnetic processes. The tailing dumps with the size of mineral smaller than 5 mm was collected through the tin mining in the area 20 years ago with the total amount of 17 million tons. The huge pile of the tailing dump may impact environmental in the area, so they need to be treated and recovered for the valuable heavy minerals and sand tailing for the local construction industry. The grade of the tailing dumps are 0.05% Sn, 0.002% Nb, 0.001% Ta. After the wet processing by the screen, hydrocyclone, spiral concentrator, and shaking table, the concentrate consist the most of cassiterite, ilmenite, garnet, zircon, monazite, xenotime, and quartz, containing 20% Sn with a yield of approximately 0.2%. The following dry processes used rotary dryer, screening, electrostatic separator, magnetic separator to separate cassiterite from the heavy minerals and quartz. The final tin concentrate can be upgraded to 72% Sn which can be sold to the tin smelting plant. The economic analysis of the cassiterite recovery processes was conducted using the discounted cash flow model in order to address the cost and benefit of the processes.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Utilization of Alumina Waste and Silica Waste for Geopolymer Production

    • Authors: Petchporn Chawakitchareon, Plengprapkun Kingthong
      Pages: 51 - 57
      Abstract: This research study on the utilization of alumina waste and silica waste for geopolymer production. Alumina waste was obtained from aluminium thermal metallurgy industry, silica waste was obtained from silicone recycle industry in Thailand. This present study aimed at investigating the basic physical and chemical properties of waste materials and also the optimal proportion in geopolymer production. The results revealed that alumina waste contained 48 percent of aluminium oxide, 4.18 percent of Silicon dioxide and average particle size is 36 micrometers. Silica waste contained 71.3 percent of Silicon dioxide and average particle size is 49 micrometers. The leaching tests of heavy metals also indicated that the level of all heavy metals concentration were over the standard set by the Ministry of Industry, Thailand which means both alumina and silica waste were considering as hazardous waste. In geopolymer production, the mortar was cast in 5x5x5 centimeters cubic shape for both methods with cured temperature at 60 degree celsius. Compressive strength was tested at 1, 7, 14 and 28 days. The results revealed that the best SiO2:Al2O3 ratio must be 3:1 mixed by alumina waste 46 g. and silica waste 24 g. with 10 ml of sodium hydroxide and 20 ml of sodium silicate. This proportion gain the highest compressive strength for 262.8 kg/cm2 at 28 days of curing which over the standard for hollow load-bearing concrete masonry units (TIS57-2530) and costs 4.03 THB/mortar. The leaching tests were estimated again after the production of geopolymer. The results indicated that the concentration of all heavy metals were within the standard set by the Ministry of Industry, Thailand. Therefore the production of geopolymer mortar from alumina waste and silica waste were not considering as hazardous waste.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Carbon Dioxide Adsorption Using Activated Carbon via Chemical Vapor
           Deposition Process

    • Authors: Rewadee Anuwattana, Chaiwat Patkool, Petchporn Chawakitchareon
      Pages: 59 - 68
      Abstract: This research aims to study the physical-chemical characteristics and carbon dioxide adsorption using commercial activated carbon (GAC) by comparing with commercial activated carbon. Chemical vapor deposition (CVD) of carbon molecular sieve prepared from activated carbon (CMSGAC) was prepared using acetylene at various conditions, such as temperature, time and acetylene flow rate. The results indicated that CMSGAC had high adsorption capacity and high selectivity for the adsorption ratio between carbon dioxide and methane. The experiments were carried out by using the samples of GAC, CMSGAC, and commercial carbon molecular sieve (CMSCOM) for adsorption of mixed gas of 30% CO2, 20% N2, and 50% CH4, respectively. The results showed that the adsorption efficiency at 50% of inlet carbon dioxide concentration of GAC, CMSGAC, and CMSCOM was at 85, 114, and 140 min, respectively. The purity of methane was 81.53, 93.16, and 98.26%, respectively. The selectivity for the adsorption ratio between carbon dioxide and methane was 1.32, 16.52, and 24.89, respectively. The cycle time of the samples was 3, 7, and 8 cycles, respectively. Finally, the maximum adsorption capacity of the samples was 1.74, 3.26, and 4.06 mole CO2/kg absorbent, respectively.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Recovery Slime Waste from Feldspar Flotation Plant at Attanee
           International Co. Ltd., Tak Province, Thailand

    • Authors: Natatsawas Soonthornwiphat, Somsak Saisinchai, Pornthip Parinayok
      Pages: 69 - 78
      Abstract: The purpose of this research is to recover slime waste from feldspar flotation plant at Attanee International Co. Ltd., Tak province. Slime waste with particle size less than 230 mesh, is found about 20% of the total ore feed. Since 1985, company has been producing slime waste approximately 200,000 tons, causing a huge pile of stock and obstructing the operation area. The mineral compositions of slime waste by X-Ray Diffraction (XRD) showed that it consisted of albite, orthoclase, quartz, and ferrous impurity minerals such as muscovite, biotite, mica, and garnet. The elemental analysis by X-Ray Fluorescent (XRF) showed that the percentage of grade contained 72.53% SiO2, 15.70% Al2O3, 1.56% Fe2O3, 0.16% TiO2, 0.40% CaO, 0.07% MgO, 4.87% K2O and 4.38% Na2O. After that, this slime waste was sent to the processes of dirt washing, classifying, attrition scrubbing, separating the ferrous impurity minerals, and preparing for flotation by washing drum, trommel, attrition scrubber, cone classifier, permanent drum magnetic separator, wet high intensity magnetic separator, and hydrocyclone. At this stage, the slime mainly consisted of albite, orthoclase, and quartz with 74.43% SiO2, 15.15% Al2O3, 0.12% Fe2O3, 0.04% TiO2, 0.43% CaO, 0.01% MgO, 4.73% K2O and 4.75% Na2O at a yield 35%. Study on fine feldspar flotation, which is for removing quartz from feldspar, showed that the optimum condition of 20% solids must be adjusted to pH 2 by hydrofluoric acid (HF), using A-TD as a collector at 1,400 grams per ton feed, conditioning time and flotation time of 5 minutes each. The results of the study showed that the recovery of feldspar attained 69.7% with 67.82% SiO2, 18.54% Al2O3, 0.14% Fe2O3, 0.03% TiO2, 0.52% CaO, 0.006% MgO, 6.88% K2O and 6.07% Na2O, which meet ceramic industry’s specifications.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Synthesis of Tobermorite from the Ash after Treatment of
           Asbesto-Containing Disaster Waste, and Its Removal Ability of Cs(I) from
           Aqueous Solution

    • Authors: Takaashi Wajima
      Pages: 79 - 91
      Abstract: Tobermorite was synthesized successfully from the ash, which was produced and detoxified from asbesto-containing disaster waste in great east Japan earth quake, by alkali hydrothermal treatment. Tobermorite synthesis was examined as a function of reaction temperature and NaOH concentration. The formation of tobermorite was identified in the product treated with 1-4 M NaOH solution at 130 and 180 oC, while no product phases was identified at 80 oC. With increasing reaction temperature, intensity of tobermorite phase in the product and Cs+ removal ability of the product increase. The product, which was treated with 4 M NaOH at 180 oC for 20 h, revealed the high selective uptake for Cs+ in saline water. The Cs+ uptake of the product was extrapolated using Langmuir and Freundlich isotherm models, experimental data are found to fit Langmuir than Freundlich, and the calculated uptake amount was 0.51 mmol/g. The kinetics for Cs+ uptake was tested for pseudo-second order reactions, and the rate constants of uptake were calculated. With increasing temperature of aqueous solution, the kinetics of uptake is almost same and the uptake amount of Cs+ decreases. The product is expected to be used for Cs+ removal from wastewater.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Microwave-Assisted Thermal Remediation of Diesel Contaminated Soil

    • Authors: Kuen-Sen Chang, Wen-Hung Lo, Wen-Min Lin, Jun-Xin Wen, Shi-Cheng Yang, Chu-Jun Huang, Hu-Yuan Hsieh
      Pages: 93 - 100
      Abstract: Leakage of petroleum products, gasoline and diesel, at gas station had become one of major soil contamination sources in Taiwan. Total number of 154 petroleum contaminated gas stations was successively ascertained since the implementation of Soil and Groundwater Remediation Act in 2002. One of the contaminated gas stations, mainly diesel polluted, was studied for the feasibility of microwave-assisted thermal remediation. The average of total petroleum hydrocarbons (TPHt) in hotspot of this site was 2,845 mg/kg exceeding regulatory limit (1,000 mg/kg). According to the groundwater condition in the site, soil samples treated by microwave radiation with and without water as saturation and vadose zones were respectively tested in laboratory. The results show that a 12-min microwave energy can heat soil with water to reach 235 °C and degrade its TPHt to 934 mg/kg; additionally, a 5-min microwave energy can heat soil without water to reach 220 °C and degrade its TPHt to 520 mg/kg. Both soil samples passed TPHt regulatory limit and microwave remediation with fast and effective advantages for petroleum products contaminated soil was also verified.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Energy Saving and CO2 Mitigation of Electric Vehicle (EV) Technology in
           Lao Transport Sector

    • Authors: Sengsuly Phoualavanh, Bundit Limmeechokchai
      Pages: 101 - 109
      Abstract: The high increase in number of vehicles in Lao transport sector in the medium and long-term happens due to continuous growth in transport service demand, which in turn will increase energy consumption in the transport sector. Electric vehicle (EV) technologies can inhibit increment in energy demand growth and energy-related CO2 emissions in the transport sector; however, cost remains a barrier for the technology diffusion. In this study, a stock vehicle turnover model of the passenger vehicles was developed to assess the potential of EV technology employment for energy saving and CO2 mitigation in the case of Lao PDR. Three vehicle technologies of EV were chosen to develop countermeasure scenarios. They were the battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs). The Long-rang Energy Alternative Planning (LEAP) model was used to forecast sector-wise transport demand until 2050, considering the base year as 2010. Altogether three scenarios were developed namely, the business as usual (BAU) scenario that relies on conventional internal combustion engine vehicles (ICEVs), and two alternative scenarios, namely CM-R and CM-I scenarios, targeting the penetration of (i) BEVs, (ii) HEVs, and (iii) PHEVs. In addition to the analysis of emission mitigation and energy system impacts, co-benefits of CO2 mitigation are also investigated in terms of emissions of local air pollutants under modelled scenarios. Results show that in the BAU scenario, energy consumption in the transport sector will increase from 548 ktoe in 2010 to 2,823 ktoe in 2050 while CO2 emission will increase from 1,656 kt-CO2 in 2010 to 8,511 kt-CO2 in 2050. However, in countermeasure scenarios, the high penetration of EV technologies will result in reduction of CO2 emissions when compared with the BAU scenario. In co-benefit analysis, reduction in emissions of other air pollutants was also observed.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Scenario-Based Analysis of CO2 Mitigation Potential in the Transport
           Sector: Comparison between Lao PDR and Thailand

    • Authors: Sengsuly Phoualavanh, Bundit Limmeechokchai
      Pages: 111 - 119
      Abstract: This paper presents an analysis of CO2 mitigation potential in the transport sector between Lao PDR and Thailand. The Long-rang Energy Alternative Planning (LEAP) model was used to forecast transport service demand, energy consumption and CO2 emission of two selected countries during the period from 2010-2050. In this study, a stock vehicle turnover model was developed to assess the potentials of energy saving and CO2 mitigation of policies relevant to the transport sector in Lao PDR and Thailand. For this analysis, three mitigation actions were selected, namely, 1) fuel switching, 2) advanced technology and 3) modal shift to reduce energy consumption and CO2 emissions. Results of analyses show that, in the business as usual (BAU) scenario during 2010 to 2050 for Laos, it can save 9.4% of total energy consumption in 2050 while the cumulative CO2 emissions will be reduced by 15% in 2050. For Thailand, the energy consumption in the transport sector will increase by approximately two folds. However, in CO2 countermeasure scenario, the cumulative energy savings in 2050 will be approximately 5.2% while the cumulative CO2 mitigation in 2050 will be about 14.6% when compared to the BAU scenario.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Evaluation on Recovery of Glass and Plastics from Compact Fluorescent
           Lamps (CFLs) by Air Separation Unit

    • Authors: Seung-Whee Rhee, Hyeong-Jin Choi
      Pages: 121 - 127
      Abstract: Compact Fluorescent Lamps (CFLs) are composed of glass, plastic, non-ferrous metal, ferrous metal, paper, plastic, rubber, and so on. In order to separate glass and plastic among CFLs components, air separation unit is applied using the difference in specific gravity. Since specific gravities of glass, plastic, non-ferrous metals, rubber, etc. were widely spread, it can be separated by the different specific gravity between 0.40 and 4.36. In air separation unit, particle size and air speed are controlled to recover glass and plastics among the components of CFLs. In other words, it can be removed paper and vinyl to recover glass and plastics. The specific gravities of paper and vinyl in CFLs are 0.45 and 0.88, respectively. And the specific gravities of glass and plastics are almost similar to be 2.2-2.6. In air separation unit, the used particle size of the components from CFLs is less than 6 mm. Since phosphor powder and ferrous metals are recovered prior to the air separation unit, the components are not involved those materials. By utilizing a vertical and zigzag type of air separation unit, thereafter, recovery of glass and plastics is estimated with changing air speed. As the air speed increased from 3.08 m/s to 6.75 m/s, separation efficiency of glass and plastics increased from 42.0% to 99.3%. Due to the experimental results of air separation unit, it can find that paper and vinyl from the components of CFLs be efficiently removed by the air separation unit.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • A New Trend of Physical Concentration in Resources Recycling

    • Authors: Shuji Owada
      Pages: 129 - 136
      Abstract: Physical separation is one of the key technologies in the field of resources recycling for concentrating targeted component(s) and could create an environment friendly recycling process because of their relatively low energy consumption and low cost required. Physical separation process involves two kinds of stages, one is comminution for achieving the liberation of targeted component(s) and the other is real separation of target component(s) from the others. Recently a variety of smart comminution processes, involving mechanical and electrical disintegration as well as the pre-treatment, is developed for aiming selective breakage of phase boundaries of the solid materials to be recycled. The paper indicated several examples of such processes, (1) selective mechanical comminution for effective utilization of aluminum dross, (2) two-stage comminution for recovering minor rare metals from electronic appliances, and (3) concentration of platinum group metals from spent automobile catalyst. The paper also mentioned a sensor based sorting (SBS) process by combining several sensing systems, XRT and XRF, to achieve a horizontal recycling of scrap aluminum.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • A Global Environment Analysis and Visualization System with Semantic
           Computing for Multi-Dimensional World Map

    • Authors: Yasushi Kiyoki
      Pages: 137 - 144
      Abstract: Humankind, the dominant species on Earth, faces the most essential and indispensable mission; we must endeavor on a global scale to perpetually restore and improve our natural and social environments. The essential computation in environmental study is context-dependent-differential computation to analyze the changes of various situations (temperature, color, CO2, places of livings, sea level, coral area, etc.). It is important to realize global environmental computing methodology for analyzing difference and diversity of nature and livings in a context dependent way with a large amount of information resources in terms of global environments. It is also significant to memorize those situations and compute environment change in various aspects and contexts, in order to discover what is happening in the nature of our planet. We have various (almost infinite) aspects and contexts in environmental changes in our planet, and it is essential to realize a new analyzer for computing differences in those situations for discovering actual aspects and contexts existing in the nature. We propose a new method for Differential Computing in our Multi-dimensional World map. We utilize a multi-dimensional computing model, the Mathematical Model of Meaning (MMM), and a multi-dimensional space filtering method with an adaptive axis adjustment mechanism to implement differential computing. Computing environmental changes in multi-aspects and contexts using differential computing, important factors that change natural environment are highlighted. We also present a method to analyze and visualize the highlighted factors using our Multi-dimensional World Map (5-Dimensional World Map) System. We also introduce the concept of “SPA (Sensing, Processing and Analytical Actuation Functions)” for realizing a global environmental system, to apply it to Multi-dimensional World Map (5-Dimensional World Map) System. This concept is effective and advantageous to design environmental systems with Physical-Cyber integration to detect environmental phenomena as real data resources in a physical-space (real space), map them to cyber-space to make analytical and semantic computing, and actuate the analytically computed results to the real space with visualization for expressing environmental phenomena, causalities and influences.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Economical Wet Extraction of Lipid from labyrinthula Aurantiochytrium
           limacinum by Using Liquefied Dimethyl Ether

    • Authors: Rintaro Hoshino, Kazuya Murakami, Wahyudiono ., Siti Machmudah, Yuji Okita, Eiji Ohashi, Hideki Kanda, Motonobu Goto
      Pages: 145 - 153
      Abstract: Recently, a simple method for the extraction of lipids from wet biomass using liquefied dimethyl ether (DME) without drying, cell disruption, or heating was proposed. Here, the versatility of this method was evaluated for labyrinthula Aurantiochytrium limacinum (A. limacinum). The liquefied DME was passed through the extractor that filled by A. limacinum at different time intervals. The extraction of lipids from A. limacinum of moisture-rich microorganism was successfully achieved, the yield of lipid was 46.1 wt% of the dry weight of the sample. In comparison, the yields of lipid were 21.3 wt%, 43.6 wt% and 50.7 wt% when supercritical carbon dioxide (SCCO2), hexane-Soxhlet and Bligh-Dyer (BD) extraction methods were applied as extractants, respectively. However, the drying and cell-disruption process were required in SCCO2, hexane-Soxhlet, and BD extraction methods.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Functional Ingredients Extraction from Garcinia mangostana Pericarp by
           Liquefied Dimethyl Ether

    • Authors: Hazuki Nerome, Rintaro Hoshino, Shota Ito, Ryohei Esaki, Yuki Eto, Shion Wakiyama, Tanjina Sharmin, Motonobu Goto, Hideki Kanda, Kenji Mishima
      Pages: 155 - 162
      Abstract: The mangosteen (Garcinia mangostana Linn.) pericarp contains rich xanthone, a one kind of the polyphenols in the non-edible portion. In recent years, xanthones have been noted as a functionality such as anti-cancer effect and is expected as pharmaceuticals and health supplements. In this work, extraction of xanthones from mangosteen pericarp by using liquefied DME were investigated. Wet powder and cube samples were used as a raw material. Experimental conditions were 35 °C, 0.8 MPa with various amounts of sample (1, 3, 6 g). Extracted components were analyzed by using high performance liquid chromatography (HPLC). As a result, it was confirmed that eight kinds of xanthones such as alpha-mangostin, 3-Isomangostin, Mangostanol, 8-Desoxygartanin, Gartanin, Garcinone E, 9-Hydroxycalabaxanthone, beta-Mangostin were extracted. The highest yield of alpha-mangostin (42.9 mg/g_dry sample) was obtained with a powder sample of 6 g loaded. Final alpha-magostin corresponded to about 104% of the ethanol extraction with wet mangosteen pericarp, and 72% of the dried sample. Therefore, it was considered that in the extraction of xanthones from the mangosteen, liquefied DME extraction was valid.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Recycling Nonmagnetic Material from De-sulferization Slag as Coarse
           Aggregate through Cold-Pressing Technique

    • Authors: Chih-Ta Tsai, Chia-Cheng Wu, Teng-Ker Hsu, Juu-En Chang
      Pages: 163 - 170
      Abstract: Every year there was approximately 500,000 tons of de-sulferization slag generated in Taiwan, but the recycling amount was very slightly. A new approach, the cold-pressing technique that incorporates the principles of the cement chemistry and composite material was developed to recycle innocuous resources (e.g. construction residual soil, granite and lime sludge, and sediment, etc.) as recycling coarse aggregate. Even this technique also has successfully been applied to recycle stainless steel reductive slag with low volume stability. This paper aims to show that using cold-pressing technique can recycle nonmagnetic material from de-sulferization slag as coarse aggregate. Herein the cement-based composite is regarded as concrete. Particularly, the mixture proportions with a low cement amount of 100 kg/m3 and more than 70% (by weight) of nonmagnetic material from de-sulferization were designed. The test results show that the specific gravity of recycling coarse aggregate is about 1.67 in the OD state; the absorption capacity is 27.65%; the dry loose density (i.e. unit weight) is about 1,106 kg/m3; and other characteristics conform to ASTM C33. Therefore the cold-pressing technique is a new and practicable approach to recycle nonmagnetic material from de-sulferization slag in future.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
  • Waste to Electricity Generation in Thailand: Technology, Policy,
           Generation Cost, and Incentives of Investment

    • Authors: Prachuab Peerapong, Bundit Limmeechokchai
      Pages: 171 - 177
      Abstract: Waste-to-Energy is a challenging management in developing countries. There are many different technologies to generate electricity or heat from wastes. However, reuse and recycling are first prioritized as left a fraction of waste can be used as energy recovery. The initial cost to generate electricity from solid waste incineration is prohibitively high due to its cost of advance technology and the cost of equipment to control emissions. Thailand is agricultural based country and has experiences of many technologies to utilize waste to energy. Landfill gas and thermal gasification are increasingly interesting alternatives to municipal solid waste incineration and it is recommended that biogas technology is suitable and is cost effective in management of organic waste or animal manure waste. This research studied in existing technologies in terms of electricity generated from waste, long term government policy, carbon dioxide reduction, electricity cost production and incentive investment. Until recently, Thailand has generated electricity from waste of 47 MW, from the target in 2021 with target capacity of 400 MW. Since Thailand has an incentive investment of electric power generated from renewable sources and wastes in terms of feed-in tariffs it can motivate private investors to invest and produce electricity to the grid. To generate electricity from waste it also has potential in reducing CO2 reduction and creates more potential jobs. In various agricultural based industries such as palm oil industry, cassava industry, in animal farm and in landfills gas have potential to generate electricity in Thailand. In case of landfill gas with the installed capacity of 3.0 MW, it can generate electricity of 13,492 MWh per year and produce potential of selling carbon credits of 60,532 ton-CO2 per year.
      PubDate: 2016-08-29
      Issue No: Vol. 20, No. 4 (2016)
       
 
 
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