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The kinetics and the mechanism of the oxidation of carbon monoxide in the presence of hydrogen
Author(s) -
Arustamyan A. M.,
Shakhnazaryan I. K.,
Philipossyan A. G.,
Nalbandyan A. B.
Publication year - 1980
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550120106
Subject(s) - chemistry , carbon monoxide , kinetics , hydrogen , torr , reaction mechanism , reaction rate constant , chemical kinetics , analytical chemistry (journal) , thermodynamics , catalysis , organic chemistry , physics , quantum mechanics
The kinetics of the slow oxidation of CO in the presence of H 2 have been studied above the second explosion limit for the mixture 2CO + O 2 + X % H 2 at the temperature range of 530–570°C, pressures from 300 to 530 torr, and hydrogen contents of 1.1, 2.8, and 5.7%. The second explosion limit has been experimentally determined for the mixture of 2CO + O 2 containing 1.0, 3.0, and 5.7% H 2 . On the basis of the oxidation scheme of CO in the presence of H 2 , which includes the accepted mechanism of oxidation of hydrogen supplemented by the reactions in which CO takes part, the second explosion limit and the profiles of the slow reaction are calculated by computer methods. The agreement found between experimental and calculated values allows one to conclude that the scheme under consideration rather completely described the slow reaction above the second limit and the occurrence of the second explosion limit in the mixture CO–O 2 –H 2 . The rate constant for the reaction HO 2 + CO → OH + CO 2 was calculated from the experimental data and was found to agree with previous determinations.