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- W118932870 abstract "Coal liquefaction was studied in a stirred autoclave using zinc chloride catalyst in a cyclohexane solvent medium. Three different coals were investigated: SRC-I, Wyodak subbituminous coal, and Illinois number 6 bituminous coal. Studies on the effect of reaction time indicate that the solubility of Wyodak coal increased linearly up to 2 hours, while the solubility of SRC-I was nearly constant after 1 hour. Increasing reaction temperature from 250/sup 0/C to 400/sup 0/C was found to linearly increase the yield of soluble products. Hydrogen pressure had a lesser effect on the yield, but the presence of gaseous hydrogen was necessary to produce a high cyclohexane solubility. Studies with co-catalysts indicated that Zn metal, NiS, and AlCl/sub 3/ in combination with zinc chloride were all incapable of increasing the yield of oil like products. In contrast, Ni metal acted more favorably and increased yields were obtained using Ni/ZnCl/sub 2/ catalyst mixtures. Methanol, ethanol, and isopropanol additives in the presence of zinc chloride increased the solubility of coal in cyclohexane. Further studies revealed that pre-impregnation of the catalyst into the coal from methanol solution was unnecessary and that catalyst to coal contacting did not limit the rate of reaction. Studies on the effectmore » of solvent volume indicated that increasing the solvent/coal ratio had no effect on the reaction yield. Finally, the use of benzene as the extracting solvent resulted in higher yields of extractable products, exhibiting lower H/C and H/sub al//H/sub ar/ ratios compared to cyclohexane extracts.« less" @default.
- W118932870 created "2016-06-24" @default.
- W118932870 creator A5032828106 @default.
- W118932870 date "2013-03-04" @default.
- W118932870 modified "2023-09-26" @default.
- W118932870 title "COAL LIQUEFACTION USING ZINC CHLORIDE CATALYST IN AN EXTRACTING SOLVENT MEDIUM - eScholarship" @default.
- W118932870 hasPublicationYear "2013" @default.
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