浸渍法制备Pt/Al_2O_3催化剂的研究——浸渍动力学及浸渍深度的计算

CIESC Journal

浸渍法制备Pt/Al_2O_3催化剂的研究——浸渍动力学及浸渍深度的计算

王建国,张嘉郁,庞礼

北京大学化学系,北京大学化学系 ,北京大学化学系现在中国科学院环境化学研究所

出版日期:1985-03-25 发布日期:1985-03-25

Kinetics and Penetration Depth for Catalyst Preparation by Impregnation

Wang Jianguo, Zhang Jiayu and Pang Li (Department of Chemistry, Beijing University)

Online:1985-03-25 Published:1985-03-25

摘要/Abstract

摘要： 本文从Crank关于扩散-吸附过程的动力学关系式出发,得出了便于应用的动力学关系式并进而导出浸渍深度的计算公式.从所导出的关系式可以解释文献中关于浸渍深度的实验规律.由H_2PtCl_6溶液浸渍η-Al_2O_3小球的实验表明,浸渍深度的计算值与实验值是符合的.

Abstract: For a shell- or zone-progressive process of sorption, if the amount of solute in solution held in the pores of the catalyst carrier can be neglected as compared to that adsorbed, the fraction of impregnation f can be expressed as follows: where for 0.1≤f≤0.45, A =0.244+0.13M and for 0.45≤f≤0.90, A = 0.335M1.44 + 0.460 B=1.23M1.53 + 2.68 or where for 0.2≤f≤0.45, E=0.01 F=1.66 + 0.22M and for 0.45≤f≤0.90, E =(0.96M1.67 + 2.43) ×10-2 F=0. 869+0.13Mor The penetration depth l can be calculated with the following equations: or OT For the impregnation of η-A12O3 spheres with H2PtCl6 solution, the calculated values of penetration depth agree well with experimental values.

王建国,张嘉郁,庞礼. 浸渍法制备Pt/Al_2O_3催化剂的研究——浸渍动力学及浸渍深度的计算 [J]. CIESC Journal.

Wang Jianguo, Zhang Jiayu and Pang Li (Department of Chemistry, Beijing University). Kinetics and Penetration Depth for Catalyst Preparation by Impregnation[J]. .