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title: Catalytic transesterification to biodiesel at room temperature over several solid bases
author: Yang, Xing-Xia;  Wang, Yi-Tong;  Yang, Ya-Ting;  Feng, Er-Zhong;  Luo, Jia;  Zhang, Fan;  Yang, Wen-Jing;  Bao, Gui-Rong
Issued Date: 2018
Abstract: The transesterification activity of several solid base catalysts in biodiesel production was systematically studied and evaluated at room temperature. Commercialized calcined silicates showed stronger transesterification ability than other commonly-used oxides, and provided considerable biodiesel yields. Biodiesel yield of > 96% was obtained for Na2SiO3 catalyst (calcined at 400 degrees C) at 28 degrees C within 12 h with methanol/oil molar ratio of 12/1 and catalyst dosage of 5 wt%, and for CaSiO3 catalyst (calcined at 550 degrees C) at 28 degrees C within 24 h with methanol/oil molar ratio of 27/1 and catalyst dosage of 23 wt%. The high activity of Na2SiO3 came from low activation energy of 104.6 kJ/mol and considerable higher pre-exponential factor of 3.73 x 10(15) min(-1), which produced high turnover frequency of 0.234 min(-1) at 28 degrees C. The introduction of CA-O-Si structure in CaSiO3 resulted in high surface basicity of 0.70 mmol/g and high pre-exponential factor of 3.79 x 10(19) min(-1) but high activation energy of 136.4 kJ/mol. The loss of catalyst activity was mainly due to the variation of surface silicate structure during transesterification.
Related URLs: 10.1016/j.enconman.2018.02.085
Appears in Collections:生物能源研究组_期刊论文

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Recommended Citation:
Yang, Xing-Xia,Wang, Yi-Tong,Yang, Ya-Ting,et al. Catalytic Transesterification To Biodiesel At Room Temperature Over Several Solid Bases[J]. Energy Conversion And Management,2018,164(X):112-121.

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