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A UK bituminous coal was co-processed with five different petroleum residues and with hydro-treated feedstocks, in a simulation of the British Coal Corporation's two-stage liquid solvent extraction process. One-stage co-processing in the presence of catalyst and hydrogen gas was also investigated. The feedstocks and products were analysed by standard and new analytical procedures, including simulated distillation by supercritical fluid chromatography, determination of the functionality of nitrogen and sulphur and assessment of the contributions of coal and petroleum to the products by stable-isotope mass spectrometry and size-exclusion chromatography. In low severity co-processing the best yields were found to be associated with the content of n-pentane insoluble (asphaltene) aromatics in the solvent. Single-stage co-processing gave improved yields. Progressive changes in the composition of the solvent during recycling were identified. There were no changes in the distribution of nitrogen among different functional groups during co-processing, but the formation of new sulphur groups was observed.

Additional information

Authors: BARTLE K D, University of Leeds, Leeds (GB);TAYLOR N, University of Leeds, Leeds (GB)
Bibliographic Reference: EUR 13168 EN (1991) 55 pp., FS, ECU 6.25
Availability: (2)
ISBN: ISBN 92-826-2220-7
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