Liquefaction of a subbituminous coal with steam and ammonia

Liquefaction of coal with a solvent mixture of steam and ammonia was investigated. Concentrations of ammonia in the solvent mixture ranged from 0 to 30 wt %. Ammonia was found to catalyze the conversion of coal. The highest conversion for a Wyodak subbituminous coal was obtained with 2.5% ammonia at...

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Veröffentlicht in:	Ind. Eng. Chem. Res.; (United States) 1987-02, Vol.26 (2), p.206-208
Hauptverfasser:	Bienkowski, Paul R, Narayan, Ramani, Greenkorn, Robert A, Chao, Kwang Chu
Format:	Artikel
Sprache:	eng
Schlagworte:	01 COAL, LIGNITE, AND PEAT 010405 - Coal, Lignite, & Peat- Hydrogenation & Liquefaction AMMONIA Applied sciences CARBONACEOUS MATERIALS CATALYSTS CATALYTIC EFFECTS CHEMICAL REACTIONS COAL COAL LIQUEFACTION COAL LIQUIDS DISPERSIONS ELEMENTS Energy ENERGY SOURCES Exact sciences and technology FLUIDS FOSSIL FUELS Fuel processing. Carbochemistry and petrochemistry FUELS HIGH TEMPERATURE HYDRIDES HYDROGEN HYDROGEN COMPOUNDS HYDROGENATION LIQUEFACTION LIQUIDS MATERIALS MEDIUM PRESSURE MIXTURES MOISTURE NITROGEN COMPOUNDS NITROGEN HYDRIDES NONMETALS QUANTITY RATIO Solid fuel processing (coal, coke, brown coal, peat, wood, etc.) SOLVENTS STEAM SUBBITUMINOUS COAL THERMOCHEMICAL PROCESSES
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Zusammenfassung:	Liquefaction of coal with a solvent mixture of steam and ammonia was investigated. Concentrations of ammonia in the solvent mixture ranged from 0 to 30 wt %. Ammonia was found to catalyze the conversion of coal. The highest conversion for a Wyodak subbituminous coal was obtained with 2.5% ammonia at 400/sup 0/C and 750 psig. This conversion was 42.5 wt %, on a moisture- and ash-free basis (MAF), representing a 39% increase over the conversion obtained with pure steam at these conditions. The coal liquid obtained is enriched in hydrogen and has low molecular weight (number-averaged (M/sub n/) = 293, weight-averaged (M/sub w/) = 338.
ISSN:	0888-5885 1520-5045
DOI:	10.1021/ie00062a006