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Abstract
A method of calculating first-order Langmuir-Hinshelwood parameters from a rectifying plot is presented. This plot is based on the variation of conversion with pulse volume in a pulsed microcatalytic reactor. The method has been extended to treat the cases of (a) carrier gas participation in the kinetics, and (b) change in volume during reaction. It is possible to extend the method to other irreversible kinetic expressions as well. A non-broadening Gaussian pulse and other simplifying assumptions are made which allow an analytical solution for the instantaneous conversion in the pulse. The method is applied to calculate the values of the Langmuir-Hinshelwood parameters for the hydrogenation of propylene over unsupported molybdenum sulfide. The decrease in volume during this reaction has little effect on the estimated values of the kinetic parameters; the rectifying plot based on the equation neglecting volume change gives approximately the same results as that based on the equation accounting for volume change.