Selective catalytic reduction of sulfur dioxide to elemental sulfur. Quarterly technical progress report No. 4, April--June 1993
Elemental sulfur recovery from SO{sub 2}-containing gas stream is highly attractive as it produces a salable 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 plant(reaction of SO{sub 2} with H{sub 2}S over catalyst). This project will investigate a cerium oxide catalyst for the single stage selective reduction of SO{sub 2} to elemental sulfur by a reductant, such as carbon monoxide. Cerium oxide has been identified in recent work at MIT as a superior catalyst for SO{sub 2} reduction by CO to elemental sulfur because its high activity and high selectivity to sulfur over COS over a wide temperature range(400--650{degrees}C). The detailed kinetic and parametric studies of SO{sub 2} reduction planned in this work over various CeO{sub 2}-formulations will provide the necessary basis for development of a very simplified process, namely that of a single-stage elemental sulfur recovery scheme from variable concentration gas streams, The potential cost- and energy-efficiency benefits from this approach can not be overstated. A first apparent application is treatment of a 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:
- 10141958
- Report Number(s):
- DOE/PC/92534-4; ON: DE94009793; BR: AA1525050
- Resource Relation:
- Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
20 FOSSIL-FUELED POWER PLANTS
SULFUR DIOXIDE
SELECTIVE CATALYTIC REDUCTION
CERIUM OXIDES
CATALYTIC EFFECTS
SULFUR
MATERIALS RECOVERY
SPECIFICITY
CARBON MONOXIDE
REDUCING AGENTS
FOSSIL-FUEL POWER PLANTS
FLUE GAS
DESULFURIZATION
REGENERATION
PROGRESS REPORT
400201
200202
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
NOXIOUS GAS AND PARTICULATE EMISSIONS