Mineral Matter Effects in Coal Liquefaction. 1. Autoclave Screening Study

摘要

Several high-volatile bituminous coals were hydroliquefied, in a one-liter autoclave, at a temperature of 430 exp 0 C, initial (cold) H sub 2 pressure of 1000 psig, and residence time of 30 min. All experiments were carried out in creosote oil as the solvent, at a solvent: coal ratio of 2.3: 1. The feed coals ranged in mineral content from 21 percent to 5 percent, and in sulfur content from over 6 percent to under 1 percent. The coals had similar maceral distributions, and most were vitrinite-rich (greater than 85 percent). Conversions, calculated by an ash balance on the acetone-washed residues, varied from 62 to 94 percent. The liquid products were assessed in terms of sulfur content and (Brookfield) viscosity. The sulfur contents ranged from 0.43 to 0.69 percent; the viscosities (at 60 exp 0 C) varied from 75 to 761 cps. A good correlation was found between the mineral content of the feed coal and the extent of organic sulfur removal and product viscosity. The highest conversions were found for the coals having the highest mineral contents. (ERA citation 02:057925)