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The smaller molecules obtainable from coal and their significance: Part 2. High pressure extraction at 200–300 °C

✍ Scribed by M. Rahman; M. Vahrman

Publisher
Elsevier Science
Year
1971
Tongue
English
Weight
705 KB
Volume
50
Category
Article
ISSN
0016-2361

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✦ Synopsis

Exhaustive, stepwise solvent extraction of an orthohydrous and a perhydrous (cannel) coal in an autoclave at a maximum temperature of 300°C gave yields of aliphatic and aromatic hydrocarbons approximating to those found in the corresponding low temperature tars from these coals. Benzene was the main solvent and tetralin was used for the final stages. Much larger amounts of these hydrocarbons than had hitherto been suspected are present, as such, in coal, located mainly in micropores: these are the main sources of the tar hydrocarbons. There are some differences in composition between the coal and the tar hydrocarbons, due to mild cracking of the latter, and the probable destruction on carbonization of the more complex aromatic species, which, however, emerge on extraction. This work formed part of a series outlined previouslyl.

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