Title: Initial stage of coal hydrogenation in the presence of catalysts
Abstract: The initial stage of coal hydrogenation, where the reactivity was greatly affected by the chemical structure characteristics of the coal and the conversion per unit of hydrogen consumed was high, was studied. Several catalysts were studied and reactivity in an entrained-flow hydrogenation reactor and the chemical structure of the products were determined. Clear Creek, Utah, coal was hydrogenated; products were separated by stepwise extraction using hexane, toluene, and pyridine. Determination of C, H, and N for each product was carried out by a micro method using a Perkin--Elmer 240 CHN Analyzer. Results indicated that at least 20% of the coal used, converted noncatalytically into liquid and gas. ZnCl/sub 2/ was a very active catalyst in the initial stage of hydrogenation. It was concluded that a continuous distribution existed in the structural units of coal. The units taking part in the noncatalytic reaction up to about 20% conversion were characterized by higher H/C ratio, lower O, N, S/C ratio, higher content of aliphatic hydrogen (H..cap alpha.. + H/sub 0/), lower fa and 1-2 aromatic rings. In the catalytic reaction (greater than 20% conversion), the units taking part in the reaction were characterized by lower H/C ratio, higher content of Ha, highermore » fa and larger number of aromatic rings. 5 figures, 2 tables.« less
Publication Year: 1979
Publication Date: 1979-01-01
Language: en
Type: article
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Cited By Count: 1
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