Two-stage, close coupled catalytic liquefaction of coal. Tenth quarterly report, 1 January 1991--31 March 1991
The first calendar quarter of 1991 was a productive period with two bench-scale studies, microautoclave support studies, mini-Process Development Unit (PDU) preparations, and process modelling. Several catalyst presulfiding agents and CO{sub 2} effects upon liquefaction were evaluated in microautoclave scale tests. Dimethyl disulfide will be used for the PDU scale-up based on the results of these tests and prior data. Carbon dioxide appears to enhance coal conversion; however, gas and water yields are increased indicating possible water gas shift-hydrocarbon synthesis reactions. In the bench-scale studies, the rejuvenation of spent catalyst with acid and carbon burn-off produced catalytic activity akin to fresh and catalyst in a 12 day evaluation. A 14 day study of the addition of high concentrations of CO{sub 2} to a sub-bituminous coal liquefaction system demonstrated the occurrence of water gas shift hydrocarbon synthesis reactions and conversely higher coal conversions and distillate yields with high hydrogen consumptions. Preparations for a PDU Demonstration Run on Black Thunder Mine coal are underway. The British Coal Filtration Process will be used for solid separation. The results of microautoclave scale tests on Illinois, Ohio and Black Thunder Mine coals were reviewed and statistically analyzed to provide a sound basis for kinetic interpretation.
- Research Organization:
- Hydrocarbon Research, Inc., Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-88PC88818
- OSTI ID:
- 10112532
- Report Number(s):
- DOE/PC/88818--10; ON: DE92004520
- Country of Publication:
- United States
- Language:
- English
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