Development of Disposable Sorbents for Chloride Removal from High-Temperature Coal-Derived Gases

Technical Report · Tue Dec 31 00:00:00 EST 1996

DOI:https://doi.org/10.2172/421952· OSTI ID:421952

Krishnan, G N; Canizales, A ^[1]; Gupta, R ^[2]; Ayala, R ^[3]

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1. SRI International, Menlo Park, CA (United States)
2. Research Triangle Inst., Research Triangle Park, NC (United States)
3. General Electric Co., Schenectady, NY (United States). Corporate Research and Development Center

The integrated coal-gasification combined-cycle approach is an efficient process for producing electric power from coal by gasification, followed by high-temperature removal of gaseous impurities, then electricity generation by gas turbines. Alternatively, molten carbonate fuel cells (MCFC) may be used instead of gas turbine generators. The coal gas must be treated to remove impurities such as hydrogen chloride (HCl), a reactive, corrosive, and toxic gas, which is produced during gasification from chloride species in the coal. HCl vapor must be removed to meet environmental regulations, to protect power generation equipments such as fuel cells or gas turbines, and to minimize deterioration of hot coal gas desulfurization sorbents. The objectives of this study are to: (1) investigate methods to fabricate reactive sorbent pellets or granules that are capable of reducing HCl vapor in high-temperature coal gas streams to less than 1 ppm in the temperature range 400{degrees}C to 650{degrees}C and the pressure range 1 to 20 atm; (2) testing their suitability in bench-scale fixed- or fluidized-bed reactors; (3) testing a superior sorbent in a circulating fluidized- bed reactor using a gas stream from an operating coal gasifier; and (4) updating the economics of high temperature HCl removal.

• Research Organization: USDOE Morgantown Energy Technology Center (METC), WV (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
• DOE Contract Number: AC21-93MC30005
• OSTI ID: 421952
• Report Number(s): DOE/MC/30005-97/C0748; CONF-960757-38; ON: DE97051045
• Resource Relation: Conference: Advanced coal-fired power systems review meeting, Morgantown, WV (United States), 16-18 Jul 1996; Other Information: PBD: [1996]
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
40 CHEMISTRY
HYDROCHLORIC ACID
ABSORPTION
COAL GAS
DECHLORINATION
NAHCOLITE
SORPTIVE PROPERTIES
HOT GAS CLEANUP
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
FUEL CELLS
PELLETS
TEMPERATURE RANGE 0400-1000 K
BENCH-SCALE EXPERIMENTS
MINERALS
SODIUM CARBONATES
EXPERIMENTAL DATA