燃料化学学报2017，Vol.45Issue(3)：303-310,8.
新型磷钨酸基固体酸催化油酸酯化合成生物柴油
Esterification of oleic acid to biodiesel over a 12-phosphotungstic acid-based solid catalyst
摘要
Abstract
A 12-phosphotungstic acid (PTA)-based esterification catalyst was prepared by modifying PTA with 1,2,3-trizaole-4,5-dicarboxylic acid (TDA).The obtained TDA-PTA sample was characterized with XRD, FT-IR, SEM, TG and potentiometric titration techniques, and its catalytic properties for esterification of oleic acid with methanol were studied.In addition, the effects of reaction conditions, including catalyst amount, oleic acid/alcohol molar ratio, reaction time and reaction temperature, on its catalytic performance were investigated.After modification with TDA, although the Keggin structure of PTA is kep and the sample shows strong acidity, the particle morphology changes to regular spheres.In particular, the sample exhibits high catalytic activity and stability in esterification of oleic acid with methanol.The modification of PTA by TDA effectively prevents PTA from dissolving in the reaction mixture, and thus, the TDA-PTA can be recycled at least six runs without severe loss of catalytic activity, showing that it is a good heterogeneous catalyst for esterification.关键词
杂多酸/固体酸/催化/酯化/油酸Key words
heteropoly acid/solid acid/catalysis/esterification/oleic acid分类
化学化工引用本文复制引用
王红红,刘丽君,龚树文..新型磷钨酸基固体酸催化油酸酯化合成生物柴油[J].燃料化学学报,2017,45(3):303-310,8.基金项目
The project was supported by the National Natural Science Foundation of China (21101086), the Doctor Foundation of Shandong Province (BS2010CL011) and the Foundation of Liaocheng University. （21101086）
