Selective catalytic reduction of sulfur dioxide to elemental sulfur. Quarterly technical progress report No. 2, October--December 1992
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, Washington, DC (United States)
- DOE Contract Number:
- FG22-92PC92534
- OSTI ID:
- 10142599
- Report Number(s):
- DOE/PC/92534-T1; ON: DE93010851
- Resource Relation:
- Other Information: PBD: 1992
- Country of Publication:
- United States
- Language:
- English
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Selective catalytic reduction of sulfur dioxide to elemental sulfur. Quarterly technical progress report No. 3, January--March 1993
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
CERIUM OXIDES
CATALYTIC EFFECTS
SULFUR DIOXIDE
REDUCTION
CARBON MONOXIDE
OXIDATION
SULFUR
MATERIALS RECOVERY
FLUE GAS
DESULFURIZATION
CARBON OXYSULFIDE
HYDROLYSIS
PROGRESS REPORT
WATER GAS PROCESSES
CLAUS PROCESS
REGENERATION
CHEMICAL ACTIVATION
540120
200202
010800
CHEMICALS MONITORING AND TRANSPORT
NOXIOUS GAS AND PARTICULATE EMISSIONS
WASTE MANAGEMENT