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By S. Veprek, M. Venugopalan

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By S. Veprek, M. Venugopalan

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The coal samples were injected radially into the plasma by suspending these in a carrier gas, usually a stream of Ar using a fluidized bed. Recently a water-stabilized plasma generator combined with a jacketed vertical tube pyrolyzer was described for the high temperature pyrolysis of coal 246). The plasma jet reaction of coal invariably produced gas and finely divided soot. Tarry material was not found. With argon or hydrogen plasma jets, the main gaseous products were H2, CO and C2H2; with nitrogen plasmas HCN largely replaced C2H 2.

Possible means of increasing the limiting values are addition of more hydrogen to the coal structure be hydrogenation before pyrolysis or pyrolysis of coal in the presence of a significant partial pressure of hydrogen. The latter is the case found using Ar + H 2 mixture as the principal arc gas. In one investigation 2sl) the nature of the soot formed in the reaction of coal under plasma conditions was examined. X-ray diffraction photographs of the soot showed that some of the lines present in the photograph of the original raw samples were absent, while most of the other lines were reduced in intensity (Fig.

Possible means of increasing the limiting values are addition of more hydrogen to the coal structure be hydrogenation before pyrolysis or pyrolysis of coal in the presence of a significant partial pressure of hydrogen. The latter is the case found using Ar + H 2 mixture as the principal arc gas. In one investigation 2sl) the nature of the soot formed in the reaction of coal under plasma conditions was examined. X-ray diffraction photographs of the soot showed that some of the lines present in the photograph of the original raw samples were absent, while most of the other lines were reduced in intensity (Fig.

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