期刊
RENEWABLE ENERGY
卷 139, 期 -, 页码 688-695出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2019.02.111
关键词
Biodiesel; Magnetization; Bronsted and Lewis sites; Esterification
资金
- Chinese Academy of Sciences [CAS 135 program] [XTBG-T02]
- Chinese Academy of Sciences [equipment RD grant] [YZ201260]
- Natural Science Foundation of China [31400518]
Novel sulfonated magnetic solid acid catalysts (ZrFe-SA-SO3H) with both Bronsted and Lewis sites were synthesized, which provided both a high density of surface acidity (4.4-8.4 mmol/g) and considerable magnetization (3.7-8.1 Am-2/kg). The synthesized catalysts were characterized by elemental analysis, XRD, ICP-OES, FT-IR, BET, SEM-EDX, TEM, TG-DSC, VSM and Boehm titration. The prepared catalysts were tested in the esterification of oleic acid, with high yields of biodiesel (92.7-99.5%) for the first catalytic cycle at 90 degrees C for 4 h. A High biodiesel yield of 90.3% was still achieved after five cycles of Zr1.0Fe1.0-SA-SO3H. A similar situation was also observed when using sodium carboxymethylcellulose (CMC) to replace SA during catalyst preparation. (C) 2019 Elsevier Ltd. All rights reserved.
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