物理化学学报 >> 1995, Vol. 11 >> Issue (06): 498-503.doi: 10.3866/PKU.WHXB19950605

研究论文 上一篇    下一篇

激光促进乙醇氧化偶联表面反应机理

康庆华,钟顺和   

  1. 天津大学化学工程系|天津 300072
  • 收稿日期:1994-06-06 修回日期:1994-07-28 发布日期:1995-06-15
  • 通讯作者: 钟顺和

Mechanism of Laser Stimulated Surface Reaction of Ethanol Oxidative Coupling to 1,4-Butanediol

Kang Qing-Hua,Zhong Shun-He   

  1. Department of Chemical Engineering,Tianjin University,Tianjin 300072
  • Received:1994-06-06 Revised:1994-07-28 Published:1995-06-15
  • Contact: Zhong Shun-He

摘要:

利用红外光谱(IR)和激光促进表面反应(LSSR)等技术,研究了沉淀法制得Cu2(PO4)(OH)表面上的乙醇氧化偶联合成1,4-丁二醇激光表面反应机理,结果表明:固体表面键激发是激光表面反应的有效激发模式; 乙醇在固体表面材料上的特定化学吸附态形式(-P=O…H-CH2CH2OH)决定了反应产物的高选择性;固体材料表面晶格氧参与反应是使标题反应能够实现的一个重要因素.

关键词: 激光促进表面反应, 乙醇氧化偶联, 1, 4-丁二醇合成, 反应机理

Abstract:

Infrared spectroscopy, XRD and pulse CO2 laser techniques have been employed to investigate the behaviors of laser stimulated surface reaction (LSSR) of ethanol oxidative coupling to 1,4-butanediol upon the surface of Cu2(PO4)(OH) which was prepared by the method of precipitation. A reaction mechanism of laser stimulated ethanol oxidative coupling on this solid surface and a model of energy transfer and relaxation in such a process are proposed on the basis of the experimental results.
In this paper, it has been shown that the LSSR is an excellent reaction technique for ethanol oxidative coupling to 1,4-butanediol. Under the conditions of atmospheric pressure and temperature of 200℃ with 1079cm-1 laser photon exciting the surface of Cu2(PO4)(OH) for 1000 times, the CH3CH2OH conversion is above 12% and the product is solely 1,4-butanediol.

Key words: Laser stimulated surface reaction, Oxidative coupling of ethanol, Synthesis of 1,4-butanediol, Reaction mechanism