Liquefaction reactivity of low-rank coals: (Task 3.4). Final technical report, April 1, 1987-March 31, 1988 including the quarterly technical progress report, January-March 1988.

摘要

A series of second-stage liquefaction reactions were carried out in micro reactors to determine the effect of temperature, reaction, and hydrogen pressure yields and compositions of products. These reactions were carried out with the methylene chloride-soluble fraction and methylene chloride-insoluble fractions form the low- severity liquefaction of Wyodak coal and Big Brown lignite. Reactions were run in tetralin and tetralin/phenanthrene with sulfide Co-Moly catalyst. The products were separated into methylene chloride insolubles, pentane insolubles, light oils distillate, heavy oil distillate, and vacuum bottoms. Products were analyzed with (sup 13)C NMR, photoacoustic FTIR, GC/FIR/MS, and molecular weights were determined with low-angle laser light scattering photometry. Conversions of pentane insolubles to pentane solubles and yields of distillate both increased with temperature, reaction time, and hydrogen pressure, with a maximum of 92% conversion obtained at 450(degree)C, 400 psi, and hydrogen. These conditions also gave the highest yield of distillate. Chemical compositions and yield data have been obtained for the products of these reactions which will allow further studies to be carried out to track the oxygen functional groups during the liquefaction. 3 refs., 1 tab. (ERA citation 15:033877)