Temperature-programmed combustion studies of coal and maceral group concentrates

Temperature-programmed combustion profiles of coals and their maceral group concentrates were obtained by thermogravimetric analysis in air at a heating rate of 15 K min −1. The maceral group concentrates were prepared by density separation of demineralized, micronized coal samples. Particle size ha...

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Bibliographic Details
Published in:Fuel (Guildford) 1997-10, Vol.76 (13), p.1249-1255
Main Authors: Milligan, Jimmy B., Thomas, K.Mark, Crelling, John C.
Format: Article
Language:English
Subjects:
Applied sciences
coal macerals
combustion
Combustion of solid fuels
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Theoretical studies. Data and constants. Metering
thermal analysis
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Summary:Temperature-programmed combustion profiles of coals and their maceral group concentrates were obtained by thermogravimetric analysis in air at a heating rate of 15 K min −1. The maceral group concentrates were prepared by density separation of demineralized, micronized coal samples. Particle size had a significant effect on combustion profiles, with increased complexity in terms of the number of peaks observed for micronized coal compared with larger size fractions. Analysis of the combustion profiles of macerals and reconstructed whole coals indicated that in some cases maceral interactions can occur, especially in the presence of liptinite. It was also found that the reactivity of a coal cannot be predicted from the reactivities of its maceral components.
ISSN:0016-2361
1873-7153
DOI:10.1016/S0016-2361(96)00236-0