✦ LIBER ✦

Effect of small concentrations of co on rate of gasification of spectroscopic graphite in o2

✍ Scribed by J.M. Ranish; P.L. Walker Jr.

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 622 KB
Volume: 24
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(86)90103-x

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✦ Synopsis

The influence of CO on the steady state gasification rate of a spectroscopically pure graphite powder with ultra high purity O? was studied at 840 l?r 3 K for CO levels up to about 3000 ppm. The behavior of low reactivity samples differed from that of high reactivity samples. The gasification rate of low reactivity samples, distinguished as those having higher CO/CO2 product ratios and lower gasification rates with no added CO, was inhibited by CO beyond that expected from simple dilution. The gasification of high reactivity samples was inhibited for CO additions under about I00 ppm. For higher CO additions, the gasification rate of high reactivity samples was unaffected or slightly enhanced. The difference in behavior is thought to be due to different, trace amounts of impurities (catalysts) present and the inability of these trace levels of catalysts to dissipate effectively the heat of CO oxidation. Accessible catalysts are thought to originate, more or less, from dust particles and impurities within the graphite.

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