Mixed methanol/ethanol on transesterification of waste cooking oil using Mg/Al hydrotalcite catalyst

被引:61
作者
Ma, Yingqun [1 ]
Wang, Qunhui [1 ,2 ]
Zheng, Lu [1 ]
Gao, Zhen [1 ]
Wang, Qiang [3 ]
Ma, Yuhui [1 ]
机构
[1] Univ Sci & Technol Beijing, Dept Environm Engn, Beijing 100083, Peoples R China
[2] Beijing Key Lab Resource Oriented Treatment Ind P, Beijing, Peoples R China
[3] Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing 100083, Peoples R China
关键词
Biodiesel; Mg/Al hydrotalcite; Mixed methanol/ethanol; Synergistic effect; Catalyst reuse; SOLID BASE CATALYST; MG-AL HYDROTALCITES; BIODIESEL PRODUCTION; THERMAL-DECOMPOSITION; SOYBEAN OIL; RAPESEED OIL; EMISSIONS; SURFACE; DIESEL; OXIDES;
D O I
10.1016/j.energy.2016.04.066
中图分类号
O414.1 [热力学];
学科分类号
摘要
Biodiesel production from waste cooking oil using calcined Mg/Al HT (hydrotalcite) as heterogeneous catalyst was investigated. This study describes the calcined Mg/Al HT prepared under optimal conditions to catalyse waste cooking oil for biodiesel preparation and proposes a plausible catalysis mechanism. The catalysts were characterised by Fourier Transform-Infrared, X-ray diffraction, Thermal Gravity Analysis Differential thermal gravity and Brunner Emmet Teller measurements. Hydrotalcite with Mg/Al ratio of 3:1 showed a uniform mesoporous structure, excellent crystallinity, high surface area (270.5 m(2)/g) and good catalytic activity (at 500 degrees C calcination). The highest biodiesel yield obtained was 95.2% under optimised conditions of alcohol oil molar ratio of 6:1, methanol/ethanol molar ratio of 4:2, catalyst content of 1.5%, reaction time of 2.5 h, reaction temperature of 80 degrees C. Mixed methanol/ethanol showed good synergistic effects as an ester exchange agent, and the catalyst was easily separated and recycled. Therefore, Mg/Al hydrotalcite can effectively catalyse waste cooking oil for biodiesel preparation with mixed methanol/ethanol. (C) 2016 Published by Elsevier Ltd.
引用
收藏
页码:523 / 531
页数:9
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