Gasification of residual materials from coal liquefaction. Quarterly report, July--September 1978
A Type III Extended Pilot Plant Evaluation of SRC-II vacuum flash drum bottoms from the liquefaction of Kentucky No. 9/14 coal was successfully completed. A total of 31 tons of the SRC-II residue, prepared at the Ft. Lewis, Washington pilot plant, were gasified during eight pilot plant runs at 350 psig. The runs lasted from 8.0 to 14.8 hours each and a total of 78 hours of on-stream time was accumulated. The SRC-II residue contained over 27 (wt) percent ash. The residue throughput, the steam/residue ratio and the oxygen/residue ratio were varied to determine the optimum operating conditions. The steam/residue ratio controlled the gasifier temperature at a given oxygen and residue rate but had little effect on conversion. The gasifier temperature varied between 2500/sup 0/F and 2650/sup 0/F, the conversion of carbon to syngas varied between 97.3 percent and 99.5 percent. The cold gas efficiency varied between 80 and 83 percent. No major operating problems were experienced during any key phase of operation which included melting the residue, pumping molten residue to the gasifier, gasification, syngas quenching and scrubbing, slag removal and char recovery. An atmosphere of nitrogen gas was maintained above the molten residue to minimize oxidation and polymerization. The molten residue was pumped to the gasifier undiluted at an average temperature of 515/sup 0/F. No evidence of significant refractory damage or serious burner tip erosion was observed. It is concluded that the SRC-II vacuum flash drum bottoms from the liquefaction of Kentucky 9/14 coal may be efficiently gasified in a Texaco gasifier.
- Research Organization:
- Texaco, Inc., Montebello, CA (USA). Montebello Research Lab.
- DOE Contract Number:
- EX-76-C-01-2247
- OSTI ID:
- 6447622
- Report Number(s):
- FE-2247-19
- Country of Publication:
- United States
- Language:
- English
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RESIDUES
GASIFICATION
SRC-II PROCESS
TEXACO GASIFICATION PROCESS
CHEMICAL COMPOSITION
COAL LIQUEFACTION PLANTS
PHYSICAL PROPERTIES
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COAL LIQUEFACTION
INDUSTRIAL PLANTS
LIQUEFACTION
THERMOCHEMICAL PROCESSES
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