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The purpose of this research is to determine the properties of additives (heavy hydrocarbon residues from oil or organic chemicals) which are included in coal charges to increase devolatisation of the coal and improve the quality of the coke. The various available additives have been recorded and listed according to their manufacturing processes; the material balance for their carbonisation has been drawn up. This procedure was followed with a view to increasing production of the by-products of pyrolysis and improving the quality of the coke through co-pyrolysis of additives. The results show that, if additives are used in the pyrolysis of non-coking coals, and if they are carefully chosen from the range of available hydrocarbon residues, either production of by-products with a higher added value can be increased, or the quantity of anisotropic textures in the coke can be increased and its quality thereby improved. The work gives a better understanding of the mechanisms whereby coke is consolidated by the plasticising action of the co-pyrolysis additives; it establishes accountancy criteria between the nature of the coal and that of the additive; and it measures the effect of co-pyrolysis on the nature and yield of by-products.

Additional information

Authors: CERCHAR, Cerchar, Centre de Pyrolyse de Marienau, F-57612 Forbach Cedex (FR)
Bibliographic Reference: EUR 12073 FR (1989) MF, 199 pp,. ECU 8, blow-up copy ECU 25
Availability: (2)
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