【摘要】 考察了异丁烷在负载型催化剂 V2 O5/γ-Al2 O3上的脱氢行为 ,在常压下 ,反应温度 5 90℃ ,GHSV为1 0 0 0 h- 1时 ,该催化剂表现出了良好的催化性能 .用 XRD、UV-Vis、BET等手段对催化剂的结构进行了研究 .结果表明 V2 O5/γ-Al2 O3催化剂催化脱氢活性与 V2 O5的分散和状态相关联 ;载体类型 ,活性组分的担载量及载体和催化剂的焙烧温度是影响活性组分表面化学和物理状态的重要因素 .更多还原

【Abstract】 The V 2O 5/ γ Al 2O 3 for dehydrogenation of isobutane was found to have a high catalytic activity under reaction conditions of 590 ℃, GHSV=1 000 h -1 and atmospheric pressure. The structure of the catalyst was characterized by means of XRD, UV Vis and BET technique. The results indicated that the dehydrogenation behavior of the catalyst was in correlation with the dispersion and the state of vanadia on the catalyst surface. Chemical composition and physical state of vanadia on the catalyst surface are affected by the kind of support, the loading of vanadium and calcination temperature as well.更多还原