文献类型：期刊文献

英文题名：Pd/Nb2O5/SiO2 Catalyst for the Direct Hydrodeoxygenation of Biomass-Related Compounds to Liquid Alkanes under Mild Conditions

作者：Shao, Yi[1];Xia, Qineng[1];Liu, Xiaohui[1];Lu, Guanzhong[1];Wang, Yanqin[1]

机构：[1]E China Univ Sci & Technol, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2015

卷号：8

期号：10

起止页码：1761

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20152200889773);WOS:【SCI-EXPANDED(收录号:WOS:000355220300015)】；

基金：This project was supported financially by the National Natural Science Foundation of China (No. 21273071), the Science and Technology Commission of Shanghai Municipality (13520711400, 13JC1401902, and 10dz2220500), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：alkanes; biomass; heterogeneous catalysis; hydrodeoxygenation; niobium

摘要：A simple Pd-loaded Nb2O5/SiO2 catalyst was prepared for the hydrodeoxygenation of biomass-related compounds to alkanes under mild conditions. Niobium oxide dispersed in silica (Nb2O5/SiO2) as the support was prepared by the sol-gel method and characterized by various techniques, including N-2 adsorption, XRD, NH3 temperature-programmed desorption (TPD), TEM, and energy-dispersive X-ray spectroscopy (EDAX) atomic mapping. The characterization results showed that the niobium oxide species were amorphous and well dispersed in silica. Compared to commercial Nb2O5, Nb2O5/SiO2 has significantly more active niobium oxide species exposed on the surface. Under mild conditions (170 degrees C, 2.5 MPa), Pd/10% Nb2O5/SiO2 was effective for the hydrodeoxygenation reactions of 4( 2-furyl)-3-buten-2-one (aldol adduct of furfural with acetone), palmitic acid, tristearin, and diphenyl ether (model compounds of microalgae oils, vegetable oils, and lignin), which gave high yields (> 94%) of alkanes with little C-C bond cleavage. More importantly, owing to the significant promotion effect of NbOx species on C-O bond cleavage and the mild reaction conditions, the C-C cleavage was considerably restrained, and the catalyst showed an excellent activity and stability for the hydrodeoxygenation of palmitic acid with almost no decrease in hexadecane yield (94-95%) in a 150 h time-on-stream test.