Selective catalytic reduction of sulfur dioxide to elemental sulfur
Elemental sulfur recovery from SO[sub 2]-containing gas streams is highly attractive as it produces a saleable. Product and no waste to dispose of. However, commercially available schemes are complex and involve multi-stage reactors, such as, most notably in the Resox (reduction of SO[sub 2] with coke) and Claus plants(reaction of SO[sub 2] with H[sub 2]S over catalyst). This project win investigate a cerium oxide catalyst for the single-stage selective reduction SO[sub 2] to elemental sulfur by a reductant, such as carbon monoxide. Cerium oxide has been identified as a superior catalyst for SO[sub 2] reduction by CO to elemental sulfur because of its high activity and high selectivity to sulfur over COS over a wide temperature range(400--650C). Kinetic and parametric studies of SO[sub 2] reduction planned over various CeO[sub 2]-formulations will provide the necessary basis for development of a simplified process, a single-stage elemental sulfur recovery scheme from variable concentration gas streams. A first apparent application is treatment of regenerator off-gases in power plants using regenerative flue gas desulfurization. Such a simple catalytic converter may offer the long-sought Claus-alternative'' for coal-fired power plant applications.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-92PC92534
- OSTI ID:
- 6666173
- Report Number(s):
- DOE/PC/92534-T1; ON: DE93010851
- Country of Publication:
- United States
- Language:
- English
Similar Records
Selective catalytic reduction of sulfur dioxide to elemental sulfur. Quarterly technical progress report No. 3, January--March 1993
Selective catalytic reduction of sulfur dioxide to elemental sulfur. Quarterly technical progress report No. 10, October 1994--December 1994
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
CARBON MONOXIDE
OXIDATION
CARBON OXYSULFIDE
HYDROLYSIS
CERIUM OXIDES
CATALYTIC EFFECTS
FLUE GAS
DESULFURIZATION
SULFUR
MATERIALS RECOVERY
SULFUR DIOXIDE
REDUCTION
CHEMICAL ACTIVATION
CLAUS PROCESS
PROGRESS REPORT
REGENERATION
WATER GAS PROCESSES
CARBON COMPOUNDS
CARBON OXIDES
CERIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
DOCUMENT TYPES
ELEMENTS
GASEOUS WASTES
LYSIS
MANAGEMENT
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RARE EARTH COMPOUNDS
SOLVOLYSIS
SULFUR COMPOUNDS
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management