The reaction of Graphon with O2 has been studied at 625ยฐC in a static system, using initial O2 pressures between 25 and 750 mTorr. and samples pre-oxidized to varying degrees of burn-off between 0 and 20 per cent. The reaction temperature was low enough for secondary reactions to be neglected. A mas
High pressure studies of the carbon-oxygen reaction
โ Scribed by J.M. Ranish; P.L. Walker Jr.
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 770 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0008-6223
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โฆ Synopsis
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 to 0.5 1 as reaction temperature increases from 733 to 842 K. The results are considered on the basis of the known existence of stable and fleeting oxygen complexes on the carbon surface and the possible existence of nascent carbon active sites during carbon gasification.
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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 effe