X-Ray study of Low-Temperature Coke

Abstract

Low temperature coke of Ube coal carbonized in a Koppers vertical oven was studied microscopically as well as by the X-ray diffraction.At 750°C the reaction with steam on the coke proceeded uniformly in the porous matter, without changing its app-arent volume.The dimension of the graphite crystallites as determined with X-rays did not decreased sensibly after this treatment.On heat-treating the coke at 1, 300°C, it has been found that the growth of crystallites was almost suspended, while in the coke not treated with steam a growth from 10Aring;to 15Åwas observed in the direction vertical to the basal plane of graphite crystals.