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Kinetics of simultaneous oxidation of CO‐CH 4 over Pd‐K promoted NiCo 2 O 4 /γ‐Al 2 O 3 catalyst
Author(s) -
Trivedi Suverna,
Prasad Ram
Publication year - 2018
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23081
Subject(s) - catalysis , kinetics , chemistry , spinel , chemical kinetics , atmospheric temperature range , activation energy , redox , catalytic oxidation , analytical chemistry (journal) , thermodynamics , inorganic chemistry , materials science , chromatography , organic chemistry , metallurgy , physics , quantum mechanics
An optimum formulation of 0.1 %Pd‐2 %K40 %NiCo 2 O 4 /Al 2 O 3 spinel catalyst was found for the total oxidation of CO‐CH 4 mixture at the lowest temperature of 330 °C, which has never been reported before. No reaction kinetics have been reported for simultaneous catalytic oxidation of CO‐CH 4 mixture in the literature. In this paper, intrinsic kinetics for oxidation of CO‐CH 4 mixture over the spinel catalyst were presented. The experimental data were collected in a plug flow differential reactor at steady state in the kinetic controlled regime under the following reaction conditions: catalyst weight 0.1–0.5 g, flow rate of CO and CH 4 1.5 mL/min each in air with total flow of 100 mL/min, temperature range 318–333 K, and reactant conversion < 15 %. The experimental data collected in the regime free from heat and mass transfer limitations were fitted adequately by the power law rate model. The orders of the simultaneous oxidation reactions were found to be 1.05 and 1.12 with respect to CO and CH 4 in the mixture respectively. The apparent activation energies for CO and CH 4 oxidation were 54.6 and 26.11 kJ/mol respectively.