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01 SOLID FUELS Sources, Winning, Properties ## 98100001 An analysis of coal pyrolysis rate by thermogravimetry Okuo, H. et al. Nippon Enerugi Gakkaishi, 1997, 76, (9), 879-892. (In Japanese) TGA was used to study the weight loss by pyrolysis with increasing temperature under atmosphere (0.1 MPa) and reduced (lo-30 Pa) pressures of nitrogen for Japanese Miike, Akabira, Taiheiyo coals. The reduced pressure condition was employed to minimize the effects of intraparticle secondary reactions, in addition to the conventional atmosphere pressure condition. The activation energy and frequency factor obtained by analysis of the data with various heating rates assuming the first-order reaction kinetics for each coal were almost kept constant at the temperature range where the rate of weight loss was large, while the values were quite different among coals and between pressure conditions. Under the atmospheric pressure, the effects of mass transfer seemed quite remarkable.

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Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0140-6701)

Published

1998

Language

EN

Field

Engineering (Physical Sciences)