Te掺杂对MoPO/SiO_2催化剂上丙烷选择氧化制丙烯醛反应的影响  

Effect of Te on Selective Oxidation of Propane to Acrolein over MoPO/SiO_2 Catalyst

作　　者：林洪[1] 伊晓东[1] 韩智三[1] 何益明[1] 黄传敬[1] 陈陆千[1] 翁维正[1] 万惠霖[1] 

机构地区：[1]厦门大学化学系,固体表面物理化学国家重点实验室,物理化学研究所,福建厦门361005

出　　处：《催化学报》2005年第6期497-502,共6页

基　　金：国家重点基础研究发展规划项目(G1999022408)

摘　　要：考察了Te的添加及Te含量对MoPO/SiO2催化剂催化丙烷选择氧化制丙烯醛反应性能的影响.MoPO/SiO2催化剂对丙烷选择氧化制丙烯醛反应的中间产物丙烯选择性较高,而Te的添加促进了丙烯向丙烯醛的转化.N2吸附、XRD、Raman、XPS、H2-TPR、丙烷脉冲、NH3-TPD和Py-IR等实验结果表明,催化剂添加Te后虽然比表面积有所下降,但单位比表面积上的酸量增加,催化剂低温可还原性得到改善,从而有利于丙烷的转化.Te可能有利于丙烯α-H的脱除和/或烯丙基的插氧反应.Effect of To on the catalytic performance of the MOPO/SiO2 catalyst for the selective oxidation of propane to acrolein was investigated. The MoPO/SiO2 catalyst exhibited high selectivity for propene, which was a possible intermediate for the formation of acrolein. The addition of To to the catalyst enhanced the conversion of propene to acrolein. The catalysts MoPO/SiO2 and MoPTeO/SiO2 were comparatively characterized by N-2 adsorption, XRD, Raman spectroscopy, XPS, H-2-TPR, pulse reaction of propane, NH3-TPD and Py-IR. The results showed that the addition of To to the catalyst reduced the surface area, but it enhanced the specific surface acidity and improved the reducibility of the supported catalyst, and the performance of the catalyst for propane conversion was improved at the same time. To might be favorable to alpha-H abstraction of propene and/or oxygen insertion into allylic species.

关 键 词：丙烷 选择性氧化 丙烯醛 氧化钼 氧化碲 氧化硅 磷 

分 类 号：O621.251[理学—有机化学]