Wyoming coal pyrolysis

Figure 7. FT-IR monitor of Wyoming coal pyrolysis under 500 psig H2 at various temperatures.

The effect of hydrogen on coal pyrolysis can further be illustrated by Figure 4, where we compared derivative thermograms of Wyoming coal pyrolyzed at 200 psig of N2 and 200 psig of H2 at the same heating rates (20 C/min). The secondary hydropyrolysis peak... 

In the present study we investigated pyrolysis of various ranks of coals under different gaseous environments. Low-rank coals such as Wyoming subbituminous coal and North Dakota lignite were pyrolyzed and their results were compared with Kentucky and Illinois bituninous coals. 

The effect of additives on the asphaltene from the Catalytic Incorporated (Cat. Inc.) coal liquid product was studied. Asphaltene is defined as the pentane insoluble but benzene soluble part of the coal liquid. The fractionation procedure has been described in detail elsewhere(l) and is shown schematically in Figure 1. Some work was also done with A240 petroleum pitch. Elemental analysis for the Wyoming sub-bituminous coal. Cat. Inc. coal liquid product, and Cat. Inc. asphaltene and A240 petroleum pitch are shown in Table I. Measured amounts of the additive compounds to be studied were added to the Cat. Inc. asphaltene and petroleum pitch. The samples were pyrolyzed and the pyrolysis residues examined by cross polarized light microscopy. Elemental analyses of the residues were done. 

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