A new technique is described for quantitative measurement of the conditions of reactant concentration at ignition in mixtures of carbon monoxide and oxygen. A thin film of carbon covering the surface of a quartz reaction vessel reacted with oxygen to form carbon monoxide and small quantities of wate
A photoelectric study of the low pressure explosion limit of the wet carbon monoxide-oxygen reaction
β Scribed by J.W. Linnett; B.G. Reuben; T.F. Wheatley
- Publisher
- Elsevier Science
- Year
- 1968
- Tongue
- English
- Weight
- 634 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0010-2180
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β¦ Synopsis
The so.called low pressure glow and explosion limits of the water-cataiysed reaction between carbon monoxide and oxygen have been studied using a photomultiplier to obtain light intensity/time graphs. The results show no sign of a glow limit, and little discontinuity at the explosion limit. The effects of mixture composition, changes of surface, vessel packing, addition of inert gases and replacement of protium by deuterium oxide have been investigated. It is suggested that the reaction involves degenerate chain branching and the formation of a semi-stable intermediate, and that diffusion of radicals to the walls is not the most important step in chain termination.
O + CO--, CO~
π SIMILAR VOLUMES
Previous studies by Buckler and Norrish of the second limit of CO and 0 2 mixtures containing small amounts (0.25-10%) of Hz have been used to obtain the velocity constant of the reaction (33) 0 + CO + M = COz + M Theseestimatesofks3=3.9 X lo8 and 3.5 X I081iter2mole-zsec-1(M =H2) at500"and 560Β°C.
Conditions leading to an explosive reaction of carbon monoxide and oxygen in the presence of small amounts of water have been examined at temperatures of 973 and 1048 K. Carbon monoxide and water were formed in the presence of oxygen by reaction with a thin film of carbon deposited on a quartz vesse
The reaction of highly crystalline graphite flakes at 02 pressures between 0.1-6.4 MPa and temperatures between 733-842 K is followed. The global activation energy for the reaction is 204 ? 4 kJ/ mole and is independent of carbon bumoff and O2 pressure. The order of the reaction decreases from 0.83