TPD study on SO{sub 2} gasification of coal char
- Gunma Univ., Kiryu (Japan)
Elementary sulfur can be recovered from SO{sub 2}-containing gas by a gasification reaction between carbon and SO{sub 2}. Limited studies on the reaction of coal with SO{sub 2} have been reported. Works on the mechanism of gasification of coal chars with oxygen-containing gases such as O{sub 2}, H{sub 2}O, CO{sub 2} have been carried out for a long time. Recently, many temperature-programmed desorption (TPD) studies on the surface complexes formed by the chemisorption of oxygen-containing gases on carbon have been performed, because the technique is very useful to evaluate the surface active sites in detail. We already investigated the effects of coal type, mineral matter and catalyst addition on the SO{sub 2} gasification rate of coal chars. In this study, nine coal chars derived from coals ranging from brown coal to anthracite, three demineralized coal chars and catalyst-loaded coal chars were chemisorbed with SO{sub 2}. TPD patterns of samples were obtained and the relationship between the reactivities of chars and the TPD patterns was discussed. The comparison of TPD pattern of SO{sub 2}-chemisorbed char with that of O{sub 2}-chemisorbed char was also performed.
- OSTI ID:
- 433117
- Report Number(s):
- CONF-960376--
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 1 Vol. 41; ISSN 0569-3772; ISSN ACFPAI
- Country of Publication:
- United States
- Language:
- English
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