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Gasification of coals treated with non-aqueous solvents. 1. Liquid ammonia treatment of a bituminous coal

โœ Scribed by Minoru Matida; Yoshiyuki Nishiyama; Yasukatsu Tamai

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
403 KB
Volume
56
Category
Article
ISSN
0016-2361

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โœฆ Synopsis

A Japanese bituminous coal was treated with liquid ammonia at temperatures up to 120ยฐC.

Extract was separated from the treated coal by washing with benzene-ethanol mixture.

The amount of extract was about 2% in a single treatment at 120ยฐC and some additional extract was obtained by successive treatments. Particles of the residue had cracks and showed an increase in surface area. The ammonia-treated coal was found highly reactive toward gasification with hydrogen at high temperature when catalysed by nickel.

๐Ÿ“œ SIMILAR VOLUMES

Gasification of coals treated with non-a
Gasification of coals treated with non-aqueous solvents. 2. Effect of liquid-ammonia treatment on gasification with hydrogen
โœ Yoshiyuki Nishiyama; Yasukatsu Tamai ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 375 KB

Japanese bituminous coals, treated with liquid ammonia and impregnated with nickel, were gasified with hydrogen at ambient pressure. The rates of gasification of the treated coals were larger than those of untreated ones by 2 to 8 times at 1273 K. A repeated treatment with liquid ammonia enhanced th

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The swelling behaviour of a single coal particle was examined photographically under rapid heating up to 870 K in an atmosphere of nitrogen or hydrogen, to test how treatment with liquid ammonia affected the swelling property of a Japanese bituminous coal. It was found that the treated particle bega

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Nickel-catalysed steam gasification was examined for two Japanese and three German coals which had been pretreated with liquid ammonia. Reaction temperatures range from 923 to 1123 K. The greatest enhancement in reactivity by ammonia treatment and 1 wt % nickel loading was observed for Leopold coal.