物理化学学报 >> 1988, Vol. 4 >> Issue (03): 262-266.doi: 10.3866/PKU.WHXB19880308

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CO氢化合成乙醇反应的过渡应答研究——改性Rh/Al2O3催化剂的吸附特性

陆云; 刘旦初; 郑绳安   

  1. 复旦大学化学系
  • 收稿日期:1986-10-11 修回日期:1987-04-28 发布日期:1988-06-15
  • 通讯作者: 刘旦初

STUDIED ON THE SYNTHESIS OF ETHANOL FROM CO HYDROGENATION WITH THE TRANSIENT RESPONSE TECHNIQUE——ADSORPTIVE CHARACTERISTICS OF H2 AND CO ON THE MODIFIED Rh/Al2O3 CATALYSTS

Lu Yun; Liu Danchu*; Zheng Shengan   

  1. Department of Chemistry; University of Fudan; Shanahai
  • Received:1986-10-11 Revised:1987-04-28 Published:1988-06-15
  • Contact: Liu Danchu

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摘要： 本文以四极质谱作为过渡应答测量中的分析手段, 连续快速跟踪和分析被测物种, 测量了H_2和CO在改性Rh/Al_2O_3催化剂上的吸附和脱附性能。结果发现, 507 K时H_2或CO的吸附中存在着部份不可逆吸附。CO和H_2吸附在相同的活性位上, 存在竞争吸附。CO的吸附作用略强於H_2。钾元素的改性使催化剂对H_2或CO的吸附量均减少, 然而相对于H_2而言, CO的吸附作用更强了。

Abstract: Quadrupole mass spectrometer was used in the transient response technique as an analytical tool. With this technique the adsorptive characteristics of H_2 and CO on the modified Rh/Al_2O_3 catalysts were studied. It is found that a small amount of H_2 or CO was adsorbed irreversibly on the fresh surface of catalysts at 507 K; H_2 and CO are adsorbed on the same surface sites and CO adsorption is somewhat stronger than H_2 adsorption Addition of the potassium salt reduces the amount of adsorption of H_2 or CO, but enhances the difference of adsorption strength between CO and H_2.