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Effect of oxidation on the chemical nature and distribution of low-temperature pyrolysis products from bituminous coal

✍ Scribed by Edward Furimsky; J.Anthony MacPhee; Liviu Vancea; Lynn A. Ciavaglia; Biswanath N. Nandi

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 793 KB
Volume: 62
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(83)90001-7

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✦ Synopsis

Two bituminous coals, a high volatile Eastern Canadian and a medium volatile Western Canadian, were used to investigate the effect of oxidation on yieldsand chemical composition of gases, liquids and chars produced during coal pyrolysis. Pyrolysis experiments were performed at 500°C using the Fischer assay method. Mild oxidation of coals resulted in a decrease of liquid hydrocarbon yields. Further coal oxidation increased the proportion of aromatic carbon in liquid products as determined by n.m.r., and also increased the content of oxygen in liquid products. The content of oxygen in chars was markedly lower than in corresponding coals. An attempt is made to explain reactions occurring during oxidation and subsequent pyrolysis of coal on the basis of differences in chemical composition of gases, liquids and chars.

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