丙烯氨氧化Mo-Bi-Fe-P/海泡石负载型催化剂的研究

Mo-Bi-Fe-P/Sepiolite Catalyst for Ammoxidation of Propylene

以海泡石为载体 ,通过共沉淀法制备丙烯氨氧化催化剂 ,并通过 XRD和 BET对这种催化剂进行表征 .在自制的固定床反应器中评价了海泡石负载型催化剂对丙烯氨氧化反应的催化活性 .考察了温度、催化剂的孔径分布、载体对催化活性的影响和空速对反应的影响 .结果表明 ,海泡石负载的催化剂在 V(丙烯 )∶V(氨 )∶ V(空气 ) =1∶ 1 .0 5∶ 1 1 ,空速为 5 80 h- 1 ,温度为 5 3 0℃左右 ,催化剂孔径在 40～ 1 0 0 nm时 ,丙烯转化率为 98.5 % ,丙烯腈单收率为 81 .4%

The Mo Bi Fe P/sepiolite catalysts were prepared by a coprecipitation method and characterized by XRD and BET techniques. Their catalytic activities were investigated in a selfe made fixed bed reactor as function of temperature, pore size distribution of the catalysts and space velocity(GHSV) of the feed gas. The results showed that at the conditions of V (propylene)∶ V (ammonia)∶ V (air)= 1∶1 05∶11, GHSV=580 h -1 , reaction temperature ca. 530 ℃, the catalyst had pore size ranged in 40~100 nm, acrylonitrile in yield being of 81 4% and propylene conversion of 98 5% could be achieved.