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化学学报
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化学学报 ›› 1993, Vol. 51 ›› Issue (5): 475-480. 上一篇    下一篇

研究论文

膜催化研究 I: 在钯/陶瓷复合膜反应器中催化甲醇直接脱氢制甲醛

吴惊涛;邓景发   

  1. 复旦大学化学系
  • 发布日期:1993-05-15

Study on membrane catalysis pt. 1: Production of formaldehyde by catalytic dehydrogenation of methanol in a palladium/ceramic membrane reactor

WU JINGTAO;DENG JINGFA   

  • Published:1993-05-15

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本文用化学镀方法制备了对氢具有高选择性和高透过率的钯/陶瓷复合膜, 并将此复合膜装于特制的膜反应器中, 考察了该反应器对甲醇催化脱氢制甲醛反应的促进作用。作为对比, 在常规反应器中也进行了上述反应。发现在623～773K温度范围内, 甲醇的转化率和甲醛的产率均有很大的提高。在低原料空速下(反应进程为热力学平均控制), 产物甲醛的产率可提高20%以上; 在中等原料空速下(反应进程为动力学控制), 甲醛的产率可提高10～15%。

关键词: 催化, 甲醇, 反应器, 甲醛, 脱氢, 陶瓷, 钯, 化学镀, 复合薄膜

A Pa/ceramic composite membrane of high H selectivity and permeability was prepared by electroless plating and used in a reactor to catalyze dehydrogenation of MeOH to manufacture HCHO. Compared with the reaction in a convenient reactor, the conversion of MeOH and the yield of HCHO increased at 623-773 K due to selective removal of H from the reaction system. At low feed rate, the conversion of MeOH was limited by thermodn. equilibrium, and the HCHO yield increased by ?0%; at intermediate feed rate, the MeOH conversion was limited by the reaction rate, and the HCHO yield increased by 10-15%.

Key words: CATALYSIS, METHANOL, REACTORS, FORMALDEHYDE, DEHYDROGENATION, CERAMICS, PALLADIUM, CHEMICAL PLATING, LAMINATED FILMS

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