EFFECTIVE DIFFUSIVITIES FROM DYNAMIC DIFFUSION CELL - THE GENERAL MOMENTS ANALYSIS

被引：5

作者：

ARNOST, D ^{[1
]}

SCHNEIDER, P ^{[1
]}

机构：

[1] CZECHOSLOVAK ACAD SCI,INST CHEM PROC FUNDAMENTALS,CS-16502 PRAGUE 6,CZECH REPUBLIC

来源：

CHEMICAL ENGINEERING SCIENCE | 1994年 / 49卷 / 03期

关键词：

D O I：

10.1016/0009-2509(94)87010-1

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Expressions for the first absolute moment, mu'(1), and the second central moment, mu(2), of the impulse response of the dynamic version of the Wicke-Kallenbach diffusion cell were derived for the general case of bidisperse porous medium and adsorbable tracer gas. The significance of individual terms in these expressions is discussed. All previously published results issue from the general expressions as special cases. The use of adsorbable tracers is suggested as a means of increasing the confidence of effective diffusion coefficients evaluated from experimental cell responses.

引用

页码：393 / 399

页数：7

共 14 条

[1] EVALUATION OF BIDISPERSE TRANSPORT-PROPERTIES OF A REFORMING CATALYST USING A DIFFUSION CELL .1. THEORETICAL DEVELOPMENT [J].

BISWAS, J ;

DO, DD ;

GREENFIELD, PF ;

SMITH, JM .

APPLIED CATALYSIS, 1987, 32 (1-2) :217-234

[2] EVALUATION OF BIDISPERSE DIFFUSIVITIES AND TORTUOSITY FACTORS IN POROUS CATALYSTS USING BATCH AND CONTINUOUS ADSORBERS - A THEORETICAL-STUDY [J].

BISWAS, J ;

DO, DD ;

GREENFIELD, PF ;

SMITH, JM .

APPLIED CATALYSIS, 1986, 22 (01) :97-113

[3] DYNAMIC-RESPONSE OF A SINGLE CATALYST PELLET [J].

BURGHARDT, A ;

SMITH, JM .

CHEMICAL ENGINEERING SCIENCE, 1979, 34 (02) :267-273

[4] DIFFUSION-COEFFICIENTS IN BIDISPERSE POROUS STRUCTURES [J].

BURGHARDT, A ;

ROGUT, J ;

GOTKOWSKA, J .

CHEMICAL ENGINEERING SCIENCE, 1988, 43 (09) :2463-2476

[5] DYNAMIC ANALYSIS OF ADSORPTION ON BIDISPERSE POROUS CATALYSTS [J].

DOGU, G ;

ERCAN, C .

CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 1983, 61 (05) :660-664

[6] RATE PARAMETERS FROM DYNAMIC EXPERIMENTS WITH SINGLE CATALYST PELLETS [J].

DOGU, G ;

SMITH, JM .

CHEMICAL ENGINEERING SCIENCE, 1976, 31 (02) :123-135

[7] DYNAMIC METHOD FOR CATALYST DIFFUSIVITIES [J].

DOGU, G ;

SMITH, JM .

AICHE JOURNAL, 1975, 21 (01) :58-61

[8]

DOGU G, 1987, AICHE J, V33, P322

[9] DIFFUSIVITIES IN CATALYST PELLETS WITH BIDISPERSE PORES [J].

HASHIMOTO, N ;

MOFFAT, AJ ;

SMITH, JM .

AICHE JOURNAL, 1976, 22 (05) :944-945

[10] THE EXPERIMENTAL EVALUATION OF CATALYST EFFECTIVE DIFFUSIVITY [J].

HAYNES, HW .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1988, 30 (04) :563-627

← 1 2 →