用X射线衍射 (XRD)、激光拉曼光谱 (LRS)、程序升温还原 (TPR)和微型反应测试等手段研究了Bi V Mo O复合氧化物催化剂组成、结构与丙烷选择性氧化催化性能 .结果表明不同组成的Bi V Mo O复合氧化物催化剂可形成白钨矿型晶体结构 ,丙烷...用X射线衍射 (XRD)、激光拉曼光谱 (LRS)、程序升温还原 (TPR)和微型反应测试等手段研究了Bi V Mo O复合氧化物催化剂组成、结构与丙烷选择性氧化催化性能 .结果表明不同组成的Bi V Mo O复合氧化物催化剂可形成白钨矿型晶体结构 ,丙烷选择氧化催化性能与催化剂组成和结构密切相关 .Mo组分的引入使催化剂的丙烷完全氧化催化性能受到抑制 ,丙烯醛选择性增加且在Mo (V +Mo)原子比为 0 .45时达极大值 .随Mo含量进一步增加 ,催化剂的丙烯选择性增加而丙烯醛选择性下降 .LRS和TPR结果表明 ,不同组成的Bi V Mo展开更多
The effects of the available zoon above the catalyst bed on the performance of the catalyst were investigated. It has been suggested that propylene is an intermediate species in the reaction of propane to acrolein,and...The effects of the available zoon above the catalyst bed on the performance of the catalyst were investigated. It has been suggested that propylene is an intermediate species in the reaction of propane to acrolein,and a two-step reaction scheme is proposed,the first step is oxidative dehydrogenation of propane to propylene in the gas phase then followed by the second step,the selective oxidation of propylene to acrolein on the surface of the catalyst. The performance of the catalyst depends on both the oxidative dehydrogenation of propane to propylene in the gas phase and the selective oxidation of propylene to acrolein on the catalyst surface. The thermal cracking,homogeneous oxidative dehydrogenation and heterogeneous catalytic dehydrogenation of propane as well as the selective catalytic oxidation of propane to acrolein over BiMoO based mixed oxides catalysts were studied. Under the optimum reaction conditions of propane dehydrogenation and selective oxidation of propylene,the selectivity and the yield of acrolein approached to 45mol% and 14mol%,respectively under about 30mol% propane conversion.展开更多
基金国家重点基础研究发展规划项目 (No .G19990 2 2 40 0 )南京大学分析测试基金资助课题
文摘用X射线衍射 (XRD)、激光拉曼光谱 (LRS)、程序升温还原 (TPR)和微型反应测试等手段研究了Bi V Mo O复合氧化物催化剂组成、结构与丙烷选择性氧化催化性能 .结果表明不同组成的Bi V Mo O复合氧化物催化剂可形成白钨矿型晶体结构 ,丙烷选择氧化催化性能与催化剂组成和结构密切相关 .Mo组分的引入使催化剂的丙烷完全氧化催化性能受到抑制 ,丙烯醛选择性增加且在Mo (V +Mo)原子比为 0 .45时达极大值 .随Mo含量进一步增加 ,催化剂的丙烯选择性增加而丙烯醛选择性下降 .LRS和TPR结果表明 ,不同组成的Bi V Mo
文摘The effects of the available zoon above the catalyst bed on the performance of the catalyst were investigated. It has been suggested that propylene is an intermediate species in the reaction of propane to acrolein,and a two-step reaction scheme is proposed,the first step is oxidative dehydrogenation of propane to propylene in the gas phase then followed by the second step,the selective oxidation of propylene to acrolein on the surface of the catalyst. The performance of the catalyst depends on both the oxidative dehydrogenation of propane to propylene in the gas phase and the selective oxidation of propylene to acrolein on the catalyst surface. The thermal cracking,homogeneous oxidative dehydrogenation and heterogeneous catalytic dehydrogenation of propane as well as the selective catalytic oxidation of propane to acrolein over BiMoO based mixed oxides catalysts were studied. Under the optimum reaction conditions of propane dehydrogenation and selective oxidation of propylene,the selectivity and the yield of acrolein approached to 45mol% and 14mol%,respectively under about 30mol% propane conversion.
