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- W4242833568 abstract "Research highlights are listed. Studies on the extraction of coal with tetralin show that high volatile bituminous coal is converted to oil and benzene and pyridine solubles in less than 2 minutes. The products show systematic changes in hydroaromatic and aliphatic structures as the reaction proceeds. The presence of aromatic ring structures increases with reaction time. The molecular weight of liquid products decreases with reaction time. Mild hydropyrolysis appears to be a very interesting technique for upgrading coal-derived liquids to a lighter liquid. Hydrogen consumption in this process is low. Zinc chloride impregnated on coal was found to have hydrogen exchange properties of a Bronsted acid. A coal sample without ZnCl/sub 2/ has similar exchange properties, but the rate is much less. The acidic oil fraction obtained by catalytic hydrogenation of coal was separated by gel permeation chromatography and gradient elution liquid chromatography. Function group content was found to be independent of molecular size. Gradient elution chromatography was effective in separating molecules on the basis of functional groups." @default.
- W4242833568 created "2022-05-12" @default.
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- W4242833568 date "1978-04-01" @default.
- W4242833568 modified "2023-09-30" @default.
- W4242833568 title "Applied research and evaluation of process concepts for liquefaction and gasification of western coals. Quarterly progress report, July--September 1977" @default.
- W4242833568 doi "https://doi.org/10.2172/6581445" @default.
- W4242833568 hasPublicationYear "1978" @default.
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