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Filtration in coal liquefaction: 1. Influence of coal type

✍ Scribed by James W. Clarke; Terry D. Rantell

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
645 KB
Volume
64
Category
Article
ISSN
0016-2361

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✦ Synopsis

Commercial solvent extraction systems for coal must be able to process coals with various properties. In this study the influence of coal type upon the extraction yield of coal and the filtration of extraction products has been investigated. All the coals used gave high extraction yields in hydrogenated solvent but resultant products exhibited considerable differences in rates of filtration. This variation in filtration rates is dependent upon particle size, concentration and composition of the residual solids. No simple relation was found to relate coal type with filtration rate.

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A series of experiments has been carried out to study the effects of filtration conditions upon the rate of filtration of non-hydrogenated coal digests. The results show the dependence of cake resistivity on both the filtration temperature and pressure. Filter cakes were found to be compressible, re