Accession Number : AD0714479

Title :   Calculation of Effectiveness Factors in Porous Catalysts,

Corporate Author : ROYAL MILITARY COLL OF CANADA KINGSTON (ONTARIO) DEPT OF CHEMISTRY AND CHEMICAL ENGINEERING

Personal Author(s) : Walker,W. W. ; Mann,R. F.

Report Date : 04 OCT 1968

Pagination or Media Count : 2

Abstract : Recently the evaluation of effectiveness factor from experimental reaction rates was discussed. For the first order irreversible reaction in an isothermal spherical particle at steady state, with reaction rate controlling and using data from pairs of experiments in which only particle size is varied, and equation was suggested for data analysis. It was states that the equation could be solved by iteration to yield the value of k/De and, with this value of the ratio k/De, the Thiele numbers and effectiveness factors could be calculated without recourse to curve fitting or knowledge of De, k and surface concentrations. The iteration is not overly difficult with the accuracy of the results depending on the accuracy of the evaluation of the coth function. Mathematical tables with sufficient significant figures (usually 6) are often not readily available and solutions to the equation have therefore been completed for a wide range of parameter values with the aid of an IBM 1620 computer.

Descriptors :   (*CATALYSTS, EFFECTIVENESS), MATHEMATICAL ANALYSIS, CANADA

Subject Categories : Industrial Chemistry and Chemical Processing

Distribution Statement : APPROVED FOR PUBLIC RELEASE