高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (11): 1593.

• 研究论文 • 上一篇    下一篇

膜催化研究(Ⅲ)——无机膜反应器中乙醇脱氢制乙醛

曹昭, 邓景发   

  1. 复旦大学化学系, 上海 200433
  • 收稿日期:1993-05-06 修回日期:1993-07-04 出版日期:1993-11-24 发布日期:1993-11-24
  • 通讯作者: 邓景发
  • 作者简介:曹昭, 女, 23岁, 博士研究生.

Studies on Membrane Catalysts (Ⅲ) --Preparation of Acetaldebyde by Dehydrogenation of Ethanol in a Membrane Reactor

CAO Zhao, DENG Jing-Fa   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1993-05-06 Revised:1993-07-04 Online:1993-11-24 Published:1993-11-24

PDF (PC)

摘要： 应用Sol-gel法制备了无机氧化铝膜,其孔径大小集中分布在3～5nm间,透过率和分离系数均符合Knudsen扩散.将该膜用于乙醇脱氢制乙醛反应中,分别考察了反应温度、进料空速、内管吹扫气流对乙醇转化率及乙醛产率和选择性的影响,并与相同条件下的常规反应器中的结果作了比较.结果发现,用膜反应器后,乙醇转化率及乙醛产率均明显高于常规反应器,与相应的平衡转化率相比较,乙醛收率可提高5%～10%.

关键词: 无机膜, 膜反应器, 乙醇脱氢

Abstract: Dehydrogenation of ethanol to acetaldehyde was carried out in a membrane reactor/incorporating an inorganic alumina membrane, which was prepared by the sol-gel method.The characterization showed that the distribution of pore size was 3-5 nm, while permeability and separation factor were all in good accordance with Knudsen values.The effects of reaction temperature, space velocity, sweep ratio on the conversion of ethanol were investigated in membrane reactor and the results were compared with those obtained by using the conventional reactor.It is shown that in the membrane reactor, the yield of acetaldehyde was higher than that in the conventional reactor and furthermore, the yield of acetaldehyde was also increased by 5%-10% in comparison with that of the corresponding equilibrium conversion.It meant that the shift of the equilibrium of reaction was caused by separation hydrogen from the reaction zone.

Key words: Inorganic membrane, Membrane reactor, Dehydrogenation of ethanol

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