Sulfur removal in advanced two stage pressurized fluidized bed combustion. Technical report, 1 March--31 May 1994

Technical Report · Thu Sep 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10183093· OSTI ID:10183093

Abbasian, J; Chowdiah, P; Hill, A H; Rue, D M ^[1]

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1. Inst. of Gas Technology, Chicago, IL (United States)

The objective of this study is to obtain data on the rates of reaction between hydrogen sulfide (H{sub 2}S) and uncalcined calcium-based sorbents under operating conditions relevant to first stage (carbonizer) of Advanced Two-Stage Pressurized Fluidized-Bed Combustors (PFBC). In these systems the CO{sub 2} partial pressure in the first stage generally exceeds the equilibrium value for calcium carbonate decomposition. Therefore, removal of sulfur compounds takes place through the reaction between H{sub 2}S and calcium carbonate. To achieve this objective, the rates of reaction between hydrogen sulfide and uncalcined calcium-based sorbents will be determined by conducting tests in pressurized thermogravimetric analyzer (TGA) and high-pressure/high-temperature fluidized-bed reactor (HPTR) units. The effects of sorbent type, sorbent particle size, reactor temperature and pressure, and CO{sub 2} and H{sub 2}S partial pressures on the sulfidation reaction rate will be determined. During this quarter a series of sulfidation tests were conducted in the high-pressure/high-temperature fluidized-bed reactor (HPTR) units. The effects of sorbent type, sorbent particle size, reactor temperature and pressure, and CO{sub 2} and H{sub 2}S partial pressures on the sulfidation reaction rate will be determined. During this quarter a series of sulfidation tests were conducted in the high-pressure high-temperature thermogravimetric analyzer (HPTGA unit) using limestone and dolomite. The results suggest that half-calcined dolomite is much more reactive than uncalcined limestone. Also, temperature in the range of 800 to 950 C did not significantly affect the sulfidation reaction rates for both limestone and dolomite.

• Research Organization: Illinois State Geological Survey, Champaign, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FC22-92PC92521
• OSTI ID: 10183093
• Report Number(s): DOE/PC/92521--T176; ON: DE94018860; BR: AV0100000/AV0102000
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800
014000
BITUMINOUS COAL
CALCINATION
CARBON DIOXIDE
CHEMICAL REACTION KINETICS
COMBUSTION
DESULFURIZATION
DOLOMITE
EXPERIMENTAL DATA
FLUIDIZED-BED COMBUSTORS
HYDROGEN SULFIDES
LIMESTONE
PRESSURIZATION
PROGRESS REPORT
REMOVAL
SORBENT INJECTION PROCESSES
STAGED COMBUSTION
SULFIDATION
THERMAL GRAVIMETRIC ANALYSIS
WASTE MANAGEMENT