文献类型：期刊文献

英文题名：Synthesis of bio-additive fuels from glycerol acetalization over a heterogeneous Ta/W mixed addenda heteropolyacid catalyst

作者：Peng, Qingpo[1];Zhao, Xiuge[1];Li, Difan[1];Chen, Manyu[1];Wei, Xinjia[1];Fang, Jian[1];Cui, Kai[1];Ma, Yuan[1];Hou, Zhenshan[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2021

卷号：214

外文期刊名：FUEL PROCESSING TECHNOLOGY

收录：;EI(收录号：20210309782830);WOS:【SCI-EXPANDED(收录号:WOS:000617781300003)】；

基金：The authors are grateful for support from the National Natural Science Foundation of China (21773061, 21978095) and the Innovation Program of Shanghai Municipal Education Commission (15ZZ031).

语种：英文

外文关键词：Glycerol; Heteropolyacids; Acetalization; Acidity; Hydrogenation

摘要：The heterogeneous heteropolyacid-catalyzed acetalization of glycerol with acetone was investigated under solvent-free conditions. In this work, the calcined Ta/W mixed addenda heteropolyacid catalyst ({H-20}-355) was employed as a solid acid catalyst and showed much higher activity than these soluble Keggin-type catalysts in the acetalization of glycerol with acetone due to its superacidity (H-0 =-12.95). Meanwhile, it showed high stability in catalytic recycles and extended for acetalization of glycerol with the other aldehydes and ketones. Based on the catalyst characterization by X-ray diffraction (XRD), scanning electron microscopy (SEM), P-31 NMR spectra, FT-IR spectra, pyridine-absorbed FT-IR, and Hammett acidity functions (H-0) by UV-vis spectroscopy, it was found that the acidic strength of the Ta/W mixed addenda heteropolyacid was highly dependent on the contents of crystalline water that could be tuned by calcination temperature. Notably, the solid superacid catalyst {H-20}355 was swollen by acetone, exhibiting an interesting "pseudo-liquid" behavior, which served as a microreactor and facilitated the reaction. Furthermore, after the acetalization reaction of glycerol with furfural (98% yield of acetal) on {H-20}-355 catalyst, the furan ring of the acetal products can be hydrogenated sequentially into dioxolane or dioxane with Pd/C catalyst under room temperature condition without the need of any isolation procedure.