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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 O复合氧化物催化剂的丙烷选择氧化催化性能与催化剂的金属氧物种性质相关联
The composition, structure and selectivity of catalytic oxidation of propane were investigated by X-ray diffraction (XRD), laser Raman spectroscopy (LRS), temperature programmed reduction (TPR) and micro- It is shown that scheelite-type crystal structure can be formed by Bi V Mo O composite oxide catalysts with different compositions, and the catalytic performance of selective oxidation of propane is closely related to the composition and structure of the catalyst. The introduction of Mo component inhibits the complete oxidation of propane, The acrolein selectivity increases and reaches the maximum when the atomic ratio of Mo (V + Mo) is 0.45. With the further increase of Mo content, the selectivity of propylene increases and the selectivity to acrolein decreases. The results of LRS and TPR show that the Propane Selective Oxidation Catalytic Properties of Bi V MoO Composite Oxide Catalysts with Different Compositions Associated with the Properties of Metal Oxygen Species of Catalysts