Comparison of biodiesel production from crude Jatropha oil and Krating oil by supercritical methanol transesterification |
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| Affiliation: | 1. Department of Electrical & Computer Engineering, Michigan Technological University, Houghton, MI 49931, USA;2. Department of Mechanical and Materials Engineering, Queen''s University, Kingston, Ontario K7L 3N6, Canada;3. Department of Materials Science & Engineering, Michigan Technological University, Houghton, MI 49931, USA;1. KIER-UNIST Advanced Center for Energy, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea;2. Solar Energy Research Center, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea;3. Department of Electrical, Electronic, and Control Engineering, Hankyong National University, 327 Jungang-ro, Anseong-si, Gyeonggi-do 456-749, Republic of Korea;1. Centre for Advanced Studies & Research in Automotive Engineering, Delhi Technological University, 110042 New-Delhi, India;2. Petrochemicals and Allied Department, National Research Institute for Chemical Technology, P.M.B. 1052, Zaria, Nigeria;1. Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;2. Chemical Engineering Division, Engineering Faculty, Rajamangala University of Technology Krungthep, Bangkok 10120, Thailand;3. Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000, Thailand;4. Engineering Department, Lancaster University, United Kingdom;1. Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km 14.5, Unidad San Cayetano, Toluca, Estado de México 50200, México;2. Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón esq., Paseo Tollocan s/n 50120, Toluca, Estado de México, México |
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| Abstract: | This work compared the production of biodiesel from two different non-edible oils with relatively high acid values (Jatropha oil and Krating oil). Using non-catalytic supercritical methanol transesterification, high methyl ester yield (85–90%) can be obtained in a very short time (5–10 min). However, the dependence of fatty acid methyl ester yield on reaction conditions (i.e., temperature and pressure) and the optimum conditions were different by the source of oils and were correlated to the amount of free fatty acids (FFAs) and unsaturated fatty acid content in oils. Krating oil, which has higher FFAs and unsaturated fatty acid content, gave higher fatty acid methyl ester yield of 90.4% at 260 °C, 16 MPa, and 10 min whereas biodiesel from Jatropha oil gave fatty acid methyl ester yield of 84.6% at 320 °C, 15 MPa and 5 min using the same molar ratio of methanol to oil 40:1. The product quality from crude Krating oil met the biodiesel standard. Pre-processing steps such as degumming or oil purification are not necessary. |
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| Keywords: | Biodiesel Supercritical fluid Supercritical methanol |
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