Integrated Two Stage Liquefaction: Extract Recycle to First Stage. Quarterly Technical Progress Report, January 1-March 31, 1981

摘要

This program combines a research study on Catalytic Expanded Bed Hydroprocessing of Coal Extracts (Task 1) and the operation of an Integrated Two-Stage Liquefaction process development unit (Task 2). The Task 1 baseline run closely reproduced earlier results obtained with New Brunswick process development units, when operated at similar reaction conditions. However, a two-to three-fold increase in the internal recycle rate increased extract conversion by as much as 20%. The integrated operation of Task 2 continued with equilibrated solvent. Three Short Contact Time (SCT) runs resulted in conversions of 89.7 to 93.8 percent of the moisture, ash-free (MAF) coal feed. The deasher recovered 74 to 83% of the extract from the SCT product. The second charge of LC-Fining catalyst has accumulated an age of almost 400 pounds of 850 exp 0 F+ feed per pound of catalyst. Conversion activity has held constant, while some decline has been detected in denitrogenation activity. Product quality remains high, with less than 0.2% nitrogen in the C sub 5 -850 exp 0 F product. The chemical hydrogen consumption in the LC-Fining reaction constitutes about 90% of the overall hydrogen consumption of the Integrated PDU.