✦ LIBER ✦

Influence of K and Ca additives in combination on swelling, plastic and devolatilization properties of coal at elevated pressure

✍ Scribed by M.Rashid Khan; Robert G. Jenkins

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 608 KB
Volume: 68
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(89)90251-2

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✦ Synopsis

An approach has been developed to reduce the swelling and caking behaviour of coals, using K and Ca additives applied in combination. However, the exact mechanisms of the increased activity of the additives in combination are not completely understood. It is known that Ca loses activity with time by the loss in dispersion. This study shows that K additives form various compounds by the interaction with coal minerals. It is proposed that when K and Ca additives are applied in combination, the activity of the combined system is optimized by the formation of a relatively more stable complex, which reduces the swelling of coal even under very high severity conditions (2.9 MPa hydrogen, 5 K min-').

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