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Pore structural effects in catalytic gasification of coal chars
Author(s) -
Ballal Girish,
Amundson N. R.,
Zygourakis Kyriacos
Publication year - 1988
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690340310
Subject(s) - char , catalysis , potassium carbonate , chemistry , chemical engineering , carbon dioxide , coal , carbon fibers , water vapor , dispersion (optics) , reactivity (psychology) , reaction rate , water gas shift reaction , inorganic chemistry , organic chemistry , materials science , composite material , medicine , physics , alternative medicine , optics , pathology , composite number , engineering
The effect of pore structure on the gasification of two chars impregnated with potassium carbonate catalyst is investigated. Well‐characterized char samples were reacted with carbon dioxide, water vapor, and oxygen. The effects of catalyst on the magnitude of the gasification rate as well as on the entire rate vs. conversion pattern are reported. Reactivity and structural data are analyzed to obtain a meaningful comparison of the gasification behavior for all char‐gas pairs. Initial intraparticle catalyst dispersion was strongly influenced by the pore structure of the chars. During gasification with carbon dioxide and water, the catalyst appeared to redistribute itself in accordance to the accepted reaction mechanism, leading to superior catalytic activity. The reported measurements indicate that both the pore structure of the chars and the chemistry of a particular reaction are key factors in determining the overall catalytic performance.