Characterization of the heavy products of coal pyrolysis

Abstract

In order to obtain information about the production mechanism of large molecules in coal pyrolysis, a subbituminous and two bituminous coals were heated at 500° C for 30s under vacuum. The heavy products were dissolved in tetrahydrofuran (THF) and analysed by ^1H n.m.r. spectroscopy and gel-permeation chromatography in an atmospheric-pressure column. Parallel GPC, ^1H n.m.r. and ^(13)C n.m.r. studies were conducted with THF extracts of the same coals. The results are combined with elemental analysis data to obtain structural parameters of the extracts and pyrolysates.

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