P/V比对VPO催化剂上丙烷的晶格氧选择氧化反应的影响  

Effect of n(P)/n(V) in VPO Catalyst on Selective Oxidation of Propane to Acrylic Acid and Acetic Acid by Lattice Oxygen

作　　者：王鉴[1] 赵如松[2] 

机构地区：[1]大庆石油学院石化系,黑龙江安达151400 [2]北京石油化工学院化工系,北京102600

出　　处：《催化学报》2001年第5期484-486,共3页

基　　金：国家自然科学基金资助项目 ( 2 96 76 0 0 7);黑龙江省自然科学基金资助项目 (B96 12 )

摘　　要：Vanadium phosphorus oxide (VPO) catalyst samples with different P/V molar ratios were prepared in mixture of isobutanol and benzyl alcohol, and their catalytic performance for selective oxidation of propane to acrylic acid (AA) and acetic acid (HAc) by lattice oxygen was investigated in a pulse reactor. The results showed that the AA and HAc only formed over the catalyst samples with n (P)/ n (V)>1 0. The proper n (P)/ n (V) is about 1 1, with which the catalyst samples have the best catalytic performance and maximum reversible oxygen storage capacity. It was also found that the ratio of n (AA)/ n (HAc) increased with the increasing of both the reaction temperature and the n (P)/ n (V) in the catalyst. The XRD results indicated that the title reaction is sensitive to the crystal structure and the active phase is (VO) 2P 2O 7.Vanadium-phosphorus oxide (VPO) catalyst samples with different P/V molar ratios were prepared in mixture of isobutanol and benzyl alcohol, and their catalytic performance for selective oxidation of propane to acrylic acid (AA) and acetic acid (HAc) by lattice oxygen was investigated in a pulse reactor. The results showed that the AA and HAc only formed over the catalyst samples with n (P)/n (V) > 1.0. The proper n(P)/n(V) is about 1.1, with which the catalyst samples have the best catalytic performance and maximum reversible oxygen storage capacity. It was also found that the ratio of n(AA)/n(HAc) increased with the increasing of both the reaction temperature and the n(P)/n(V) in the catalyst. The XRD results indicated that the title reaction is sensitive to the crystal structure and the active phase is (VO)(2)P2O7.

关 键 词：氧化钒 氧化磷 丙烷 丙烯酸 乙酸 晶格氧 选择氧化 钒磷混合氧化物 催化性能 催化剂 

分 类 号：O643.3[理学—物理化学]