TRANSPORT CHARACTERISTICS OF BIDISPERSE POROUS ALPHA-ALUMINAS

被引：27

作者：

VALUS, J

SCHNEIDER, P

机构：

[1] Czechoslovak Acad of Sciences, Inst, of Chemical Process Fundamentals,, Prague, Czech, Czechoslovak Acad of Sciences, Inst of Chemical Process Fundamentals, Prague, Czech

来源：

APPLIED CATALYSIS | 1985年 / 16卷 / 03期

关键词：

CATALYSIS;

D O I：

10.1016/S0166-9834(00)84397-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of porous alpha -alumina samples with intentionally varied pore size distributions was used for verification of the appropriateness of the mean transport pore model (MTPM) for bidisperse porous structures. Model parameters r and psi were determined by combining experimental results for permeation of four simple gases and counter-current diffusion of four simple gas pairs. MTPM correlates the experimental data quite satisfactorily. The mean transport pore radius, r, runs in parallel with the mean radius of macropores, indicating the predominant role of these pores in mass transport. Large anisotropy of pellet surfaces was demonstrated by comparing parameters psi , corresponding to pellet flat circular faces and cylindrical surfaces.

引用

页码：329 / 341

页数：13

共 13 条

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