Exxon catalytic coal gasification process predevelopment program. Monthly report, December, 1977
Solids analyses for all FBG yield periods have been completed. The off-line material balance computer program has been used to reconcile the data from 11 of the 18 FBG yield periods. Bench scale fixed bed gasification studies indicated that KOH is equivalent to K/sub 2/CO/sub 3/ as a gasification catalyst. However, K/sub 2/S shows lower catalytic activity than K/sub 2/CO/sub 3/. Also, Wyodak coal catalyzed with either KOH or K/sub 2/CO/sub 3/ shows the same reactivity as Illinois coal impregnated with these catalysts. Work continued on the Catalytic Coal Gasification Commercial Plant Study Design. Process bases and heat and material balances have been completed. Current efforts are directed toward calculation of investment, operating and product gas costs. A screening study was made of alternative methods of producing makeup KOH by electrolysis of KCl. This study showed that KOH could be produced in diaphragm cells or membrane cells at significantly lower cost than the current price of purchased KOH. Another screening study showed that the cost of potassium recovered by calcium hydroxide digestion is about 68% of the cost of purchased KOH. Further work will be required to better define the relative costs of recovered vs. manufactured KOH. Studies to evaluate alternative acid gas removal processes were completed. An evaluation of conventional acid gas scrubbing techniques indicated that selective heavy glycol scrubbing is the preferred process for a catalytic gasification plant, closely followed by non-selective hot potassium carbonate scrubbing. An evaluation of cryogenic fractionation for acid gas removal showed that this technique cannot be carried out without CO/sub 2/ freezing out in the fractionator.
- Research Organization:
- Exxon Research and Engineering Co., Baytown, TX (USA)
- DOE Contract Number:
- EX-76-C-01-2369
- OSTI ID:
- 6575665
- Report Number(s):
- FE-2369-23
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CATALYSTS
COMPARATIVE EVALUATIONS
MANUFACTURING
RECOVERY
COAL GASIFICATION PLANTS
DESIGN
EXXON GASIFICATION PROCESS
FUEL GAS
PURIFICATION
BENCH-SCALE EXPERIMENTS
CARBON DIOXIDE
COAL GASIFICATION
HYDROGEN SULFIDES
POTASSIUM CARBONATES
POTASSIUM HYDROXIDES
SCRUBBERS
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CARBONATES
CHALCOGENIDES
ENERGY SOURCES
EQUIPMENT
FLUIDS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROGEN COMPOUNDS
HYDROXIDES
INDUSTRIAL PLANTS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
POTASSIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification