Steam gasification reaction of coal char is a very important reaction in both theoretical aspects and industrial applications. It is generally accepted that surface oxygen complexes on carbon substrate function as intermediate in gasification reaction and that such surface complexes are formed only at active sites. Temperature-programmed desorption (TPD) technique is very useful in yielding information on surface oxygen complexes. By using TPD technique, this paper intends to clarify the nature of surface complexes on coal char after H//2O gasification or after O//2 chemisorption. In addition, the gasification reactivity was discussed in relation to TPD patterns of H//2O-gasified char or O//2-chemisorbed char. The effect of coal type and the mineral matter in coal on TPD pattern was also investigated.
|Number of pages||7|
|Journal||ACS Division of Fuel Chemistry, Preprints|
|Publication status||Published - 1987 Jan 1|
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