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α-甲基苯乙烯在三相浆化反应器中加氢的动态研究表明,催化剂还原温度对吸附平衡常数、吸附和表面反应速率系数有明显的影响。实验在全混浆化反应器中进行,温度为22℃,38℃和50℃,当还原温度从250℃增加到510℃时,PdCl_2还原为 Pd 的 Pd 分散度减小,从而使平衡吸附,吸附和表面反应速率系数均减小。吸附热和表面反应活化能分别为15.9和41.8KJ/mol,且不随还原温度而变。对于三个不同还原温度,其金属分散度的相对大小可从平衡吸附系数计算,发现其结果与 Boitiaux 等的实验结果一致。
The dynamic study on the hydrogenation of α-methylstyrene in the three-phase slurrying reactor shows that the temperature of the catalyst has a significant effect on the adsorption equilibrium constant, adsorption and surface reaction rate coefficient. The experiment was carried out in a full slurry reactor at 22 ℃, 38 ℃ and 50 ℃. When the reduction temperature was increased from 250 ℃ to 510 ℃, the Pd dispersion of PdCl_2 reduced to Pd decreased so that equilibrium adsorption, Both adsorption and surface reaction rate coefficients decreased. The heat of adsorption and the surface activation energy are 15.9 and 41.8 KJ / mol, respectively, and do not change with the reduction temperature. For three different reduction temperature, the relative size of the metal dispersion can be calculated from the equilibrium adsorption coefficient and found that the results are consistent with the experimental results of Boitiaux et al.