Abstract
Low-rank bituminous coal and its blends with 2.5 wt% of coke dust and with a mixture of 2.5 wt% of coke dust and 0.25 wt% of pyrite were pyrolysed in a quartz reactor taking 20–25 g samples. In the presence of the additives some changes were observed in the yields of solid, liquid and gaseous products of pyrolysis in the 350–450 °C range. The additives also influenced the mesophase composition. The formation of substances soluble in dimethylformamide but insoluble in hexane and chloroform (α-fraction) was shifted to higher temperatures of pyrolysis by the additives. This effect resulted in increases in coke strength and anisotropy.
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