Characterization and Suitability of Superclean Coals for Hydroliquefaction Feedstocks: 4TH Quarterly Technical Progress Report Ending June 30, 1988.

摘要

The objective of the research is to evaluate the effect of superclean coals as produced from various domestic coals using MTU's flotation technology on direct coal liquefaction. The micronized and successively clean coals range from 1.0% to 20% in ash content and contain various sulfur concentrations. They are to be assessed as coal conversion feedstocks. Thus, the proposed project will evaluate the effects of ash, sulfur, and ultrafineness of coal feed on the hydroliquefaction process. The process development unit (PDU) was completed and clean coals were successfully produced at a 500 lbs per hour rate. The Pittsburgh 8 and Lower Kittanning coals were used as the feed. Five samples having ash contents of 3%, 10%, 17%, 30%, and 43% were prepared from the PDU demonstration runs using Pittsburgh 8, and they were analyzed for composition and other physical properties. These five coals have been tested for hydroliquefaction under the same operating conditions. The ultimate analyses of the liquid products showed that the low-ash coal yielded the most liquid. The iron content displayed a positive effect on the liquid yield. 1 ref., 10 figs., 4 tabs. (ERA citation 13:044557)