| 陈明树,翁维正.负载型钒基催化剂上丙烷的临氧活化转化[J].分子催化,2000,(1):6-10 |
| 负载型钒基催化剂上丙烷的临氧活化转化 |
| Propane Activation and Conversion over Supported Vanadia-Base Catalysts in the Presence of Oxygen |
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| DOI： |
| 中文关键词: 钒氧化物 丙烷 氧化还原 催化剂 临氧活化转化 |
| 英文关键词:Vanadia,Propane,TPSR,TRIR,Redox property,Acidity |
| 基金项目:国家科技部攀登预选资助项目!(No.95-Yu-36)，高等学校博士学科点专项科研基金资助课题 |
| 陈明树 翁维正 |
| 厦门大学化学系物理化学研究所固体表面物理化学国家重点实验室!厦门361005 |
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| 中文摘要: |
| 用ＴＰＳＲ（程序升湿表面反应）－ＴＲ（ＦＴ）ＩＲ技术，研究临氧条件下丙烷负载型钒基催化剂上的活化和转化，并与催化剂的可不原性和表面酸性相关联，丙烷氧化脱氢生成丙烯与深度氧化生成ＣＯｘ的起始反应温度相同；而裂解产物Ｃ２Ｈ４和ＣＨ４的生成温度比丙烷氧化脱氢生成丙烯的高得多，可能主要源于丙烷的高温气相裂解，催化剂的表面酸性位和强的可还原性，有利于丙烷中Ｃ－Ｈ键的活化和临氧转化，降低起以攻提高丙烷转化率， |
| 英文摘要: |
| Propane activation and conversion over supported vanadia base catalysts in the presence of oxygen were studied by Temperature Programmed Surface Reaction Time resolved Infrared Spectroscopy (TPSR TRIR). Oxidative dehydrogenation of propane to propene and deep oxidation of propane to CO x appeared to take place at the same temperature, while products C 2H 4 and CH 4 may be produced mainly from gas phase cracking of propane at high temperature. Strong reducibility and surface acidity are favorable to activate the second C-H bond in propane molecule, and result in the lowering of ignition temperature of propane oxidative dehydrogenation and increasing of the propane conversion. The adsorption of propene on acid sites leads to its total oxidation. |
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