Study on pyrolyzing process of coking coals
Abstract：Different ranks coking coals were heated to different temperatures by simulating coking process, and the heated residues were studied by making use of HD-type polarizing microscope and IR spectrum. The results indicate that the vitrinite of coal begin to break firstly, then soften and melt in pyrolyzing process. The vitrinite of the same co- king coal change differently, furthermore, the degrees of breaking and softening owe different for vitrinite of different rank coals. When coal is heated to solidifying temperature, its pyrolyzing products show the optical characteristics of coke. As the temperature rises, the optical textures change sequentially. Molecular structure of organic matter of 1/3 coking coal and fatty coal as this test samples change similarly in the process of pyrolysis.
Keywords：coking coalspyrolysismicrostructuremolecular structurecoke optical texture
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 323-327 )