Effect of Bi promoter on the performances of selective oxidation of isobutane to methacrolein over MoVO/AlPO_4 catalysts  

作　　者：Xitao Wang Mei Li Fen Wang Shunhe Zhong Shi Jiang Sihe Wang 

机构地区：[1]Tianjin Key Laboratory of Applied Catalysis Science and Technology,College of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China [2]Nature Gas Company,Dagang Oil Field,Tianjin 300280,China

出　　处：《Journal of Natural Gas Chemistry》2012年第2期165-169,共5页天然气化学杂志（英文版）

基　　金：supported by the National Natural Science Foundation of China (20806059)

摘　　要：The effects of Bi on the catalytic performance of selective oxidation of isobutane to methacrolein over MoVO/AlPO4 catalyst were investigated by XRD, FT-Raman, XPS, UV-vis DRS techniques. The results show that the addition of Bi component into the MoVO/AlPO4 catalyst obviously improves the catalytic performance, and the selectivity to methacrolein can increase from 14.2% to 45.1% with the increase of Bi/V molar ratio from 0 to 1. Combining the characterization results with the reaction evaluation, it is concluded that the catalytic activities of the MoV0.3Bix/AlPO4 catalysts are related to the crystalline phase composition and the dispersion of molybdenum and vanadium oxides species in general, and also to the V5＋/V4＋ molar ratio on the surface in particular.The effects of Bi on the catalytic performance of selective oxidation of isobutane to methacrolein over MoVO/AlPO4 catalyst were investigated by XRD, FT-Raman, XPS, UV-vis DRS techniques. The results show that the addition of Bi component into the MoVO/AlPO4 catalyst obviously improves the catalytic performance, and the selectivity to methacrolein can increase from 14.2% to 45.1% with the increase of Bi/V molar ratio from 0 to 1. Combining the characterization results with the reaction evaluation, it is concluded that the catalytic activities of the MoV0.3Bix/AlPO4 catalysts are related to the crystalline phase composition and the dispersion of molybdenum and vanadium oxides species in general, and also to the V5＋/V4＋ molar ratio on the surface in particular.

关 键 词：sol-gel method selective oxidation of isobutene METHACROLEIN MoVBiO/AlPO4 catalyst 

分 类 号：O643.36[理学—物理化学] O623.11[理学—化学]