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Abstract

Systematic investigations were based on coal lithotypes of low and high ash content and variable ash composition, chosen as typical of the Rhineland lignite field. Samples covered the range of average quality coals expected to be used in prototype and demonstration plants, and of typical coals rich in alkalis, iron (including iron pyrites), alkaline earths, clays and silicic acid. On a scale model, the behaviour of the samples during gasification was observed, ash accommulations being prevented by adapting the flow conditions to the characteristics peculiar to the coal type. The process was further developed for operation at 25 bar. During testing, the mineral constituents of the coal used were investigated, as were the solid by-products and agglomerates resulting from faults in operation. Comparison was drawn with the scale-model results. Changes in the mineral composition and agglomeration behaviour of the lignite were observed during coking in an oven and were compared with the gasification results.

Additional information

Authors: BELLIN A ET AL., Deutscher Braunkohlen-Industrie-Verein EV, Köln (DE)
Bibliographic Reference: EUR 14921 DE (1994) 278 pp., MF, ECU 12
Availability: (2)
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