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Uncatalyzed and wall‐catalyzed forward water–gas shift reaction kinetics
Author(s) -
Bustamante F.,
Enick R. M.,
Killmeyer R. P.,
Howard B. H.,
Rothenberger K. S.,
Cugini A. V.,
Morreale B. D.,
Ciocco M. V.
Publication year - 2005
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.10396
Subject(s) - catalysis , reaction rate , chemistry , reaction rate constant , palladium , quartz , rate equation , plug flow , microreactor , water gas shift reaction , inconel , chemical reaction engineering , reaction mechanism , alloy , thermodynamics , hydrogen , chemical kinetics , kinetics , analytical chemistry (journal) , materials science , metallurgy , chromatography , organic chemistry , physics , quantum mechanics
The kinetics of the high‐temperature (1070–1134 K), low‐ and high‐pressure gas‐phase forward water–gas shift reaction (fWGSR) were evaluated in an empty quartz reactor and a quartz reactor packed with quartz particles. The power‐law expression for the reaction rate was consistent with the Bradford mechanism and was invariant with respect to pressure. The experimental rate constant was lower than that published by Graven and Long, and slightly higher than estimates obtained using the reaction rate expression derived from the Bradford mechanism in conjunction with values of reaction rate constants obtained from the GRI database. Similar experiments conducted using a reactor composed of Inconel® 600, a representative reactor shell material, exhibited substantially enhanced rates of reaction. A simple power‐law rate expression was incorporated into a surface‐catalyzed plug flow reactor (PFR) model to correlate the results between 600 and 900 K. Palladium and palladium–copper alloy surfaces, representative of hydrogen membranes, were also shown to enhance the fWGSR rate, but not as much as the Inconel® 600 surfaces. © 2005 American Institute of Chemical Engineers AIChE J, 2005