Wyoming coal analysis

Samples Preparation. The coal liquids were derived from the catalytic liquefaction of Pittsburgh Seam bituminous and Wyoming sub-bituminous coals. The analysis of these coals is given in Table I. The coals were liquefied in a bench-scale catalytic unit using cyclone overhead product as recycle solvent to insure that the liquid products were derived from the coal and not the solvent. The product streams from... 

A discounted cash-flow analysis of the system was made using conservative financing assumptions. These included 100% equity, 12% return on investment, and a plant life of 20 years plus a construction time of five years. Strip-mined western coal was priced conservatively at 15 per ton. This is a reasonable price, for example, for coal delivered from Gillette, Wyoming by unit train to a plant serving the Chicago area (mid-1977 prices) alternatively, a mine-mouth plant site would obtain coal at lower prices, but product transportation costs would be higher. 

A delivered coal price of 12.85/tonne and a mine mouth price of 5.45/tonne were used in the analysis. Both prices are based on 1997 average coal prices in the state of Wyoming ... 

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. 

EPRI Studies. In 1987, EPRI contracted with Fluor Daniel and Destec to conduct a detailed technical and economic analysis of IGCC power generation based on 400-MW plants for both Texas lignite and Wyoming subbituminous coal (9). Central and South West Services, Houston Lighting and Power, Texas Utilities Electric Company, and the Salt River Project also participated in this analysis. 

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See also in sourсe #XX -- [ ]

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