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A FIRST-DERIVATIVE METHOD TO EVALUATE THE KINETIC PARAMETERS FROM TRANSIENTS OF CATALYTIC IGNITION ON PLATINUM WIRES

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Author(s): O.M. Staicu | V. Munteanu | Domnina Razus | D. Oancea

Journal: Analele Universitatii Bucuresti : Chimie
ISSN 1220-871X

Volume: XVI;
Issue: II;
Start page: 85;
Date: 2007;
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ABSTRACT
The transient period for the catalytic combustion on isothermally heated platinum wires at high temperatures, described by a three parameter kinetic equation, can be conveniently exploited for the evaluation of the activation parameters using the first-derivative with respect to time of the chemical heat flow rate, an experimentally accessible property. The first-derivative curve has only two parameters, containing the essential information regarding the diffusion and reaction steps. The results obtained by this method agree very well with those reported from a nonlinear regression analysis of the integral equation, for the catalytic combustion of n-butane/air stoichiometric mixture.
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