The purpose of this study was to characterize the calcium (nature, amount of various species and state of division) in carbonaceous materials such as low-rank coal char or a model char (obtained by pyrolysis of a polymeric resin at 1273 K under an inert gas). Ca loading (~6 wt%) was performed by imp
Vanadium pentoxide as catalyst in the air gasification of chars
✍ Scribed by Carlos Moreno-Castilla; José Rivera-Utrilla; Antonio J. López-Peinado
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 503 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0016-2361
No coin nor oath required. For personal study only.
✦ Synopsis
Air-gasification at low temperatures (733-773 K) of chars from Spanish coals catalysed by V,O, has been studied and the results have been compared with those obtained previously using copper as catalyst. Under the reaction conditions, both catalysts showed high activity due to their ability to undergo redox cycles at the interface and to wet, more or less extensively, the surface of the carbon. However, samples containing copper showed the highest reactivity, in contrast to the findings of other authors at higher temperatures.
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