Solvent Tailoring in Coal Liquefaction Based on Critical Properties of Physical Solvating Agents and Hydrogen Donors, August 1, 1980-July 31, 1981

摘要

Solvent properties are very important factors in the liquefaction process. The solvent serves a three-fold purpose. It acts as a solvent for indan. The compound 1,4-DHN appears to be significantly more active than the 1,2 isomer in the presence of coal. The order of decreasing reactivity for the model H-donor species is THQ approx. = 1,4-DHN approx. = 9,10-DHA > 9,10-DHP > 1,2-DHN approx. = THA/sub c/ > IND. Table 7 presents the data for conversion of coal to cresol/THF solubles in the presence of several model donor species. The order of reactivity corresponds approximately to that of Table 6. The g of H transferred per g of maf coal (total), when multiplied by 100, gives the amount of H transferred on a wt % of maf coal feed basis, and varies from a low of 0.049 for indan to a high of 0.661 for 9,10-DHA. The amount of coal conversion is seen to correlate fairly well with the amount of H transferred as a percent of maf coal feed. Some significant conclusions are outlined; for a blank reaction without coal, the decreasing order of reactivity of hydroaromatics is 1,4-DHN > 9,10-DHA > 1,2-DHN > IND > 9,10-DHP = TET > THQ > THA/sub c/ > OHA; the decreasing reactivity of hydroaromatics in the presence of coal is THQ > 1,4-DHN > 9,10-DHA > 9,10-DHP > 1,2-DHN > THA/sub c/ > TET > IND; with respect to coal conversion, the order of decreasing effectiveness of the hydroaromatics tested is 9,10-DHA > THQ > 1,4-DHN > 1,2-DHN > 9,10-DHP > THA/sub c/ > OHA > TET > IND; and the amount of coal liquefaction is directly proportional to the amount of hydrogen transferred for several different hydroaromatic species. (ERA citation 09:001756)