期刊
RENEWABLE ENERGY
卷 93, 期 -, 页码 648-657出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2016.03.017
关键词
Biodiesel; Kaolin; Snail shell; KBr; Transesterification
资金
- Shanghai Association for Science and Technology Achievements Transformation Alliance Program [LM201559]
- Shanghai Municipal Education Commission boosting project [15cxy39]
- Science and Technology Commission of Shanghai Municipality Project [14520503200]
- Shanghai Municipal Education Commission (Plateau Discipline Construction Program)
- Shanghai Talent Development Funding [201335]
- National Natural Science Foundation of China [20976105]
- Shanghai Leading Academic Discipline Project [J51503]
Mixed and ground activated snail shell and kaolin catalysts impregnated with KBr were investigated. The snail shell and kaolin were calcined, mixed, and ground prior to immersion with KBr solution and subsequent activation at 500 degrees C for 3 h. The precursor and catalysts were characterized by thermal gravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and Brunauer-Emmett-Teller surface area. The catalytic performance of the prepared catalysts was evaluated by transesterification of soybean oil with methanol. The effects of various parameters on biodiesel yield were investigated. A biodiesel yield of 98.5% was achieved using the catalyst prepared by 40% KBr-immersed, mixed, and ground snail shell and kaolin, which were activated at 500 degrees C. The transesterification conditions were as follows: reaction temperature, 65 degrees C; reaction time, 2 h; methanol-to-soybean oil molar ratio, 6:1; and catalyst amount (relative to the weight of soybean oil), 2.0 wt%. The solid catalyst could be reused for four times, and biodiesel yield remained over 73.6% for the fourth time. (C) 2016 Elsevier Ltd. All rights reserved.
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