Selective catalytic reduction of sulfur dioxide to elemental sulfur. Quarterly technical progress report No. 2, October--December 1992

Technical Report · Thu Dec 31 04:00:00 EST 1992

DOI:https://doi.org/10.2172/10142599· OSTI ID:10142599

Liu, Wei; Flytzani-Stephanopoulos, M; Sarofim, A F

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
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800
20 FOSSIL-FUELED POWER PLANTS
200202
54 ENVIRONMENTAL SCIENCES
540120
CARBON MONOXIDE
CARBON OXYSULFIDE
CATALYTIC EFFECTS
CERIUM OXIDES
CHEMICAL ACTIVATION
CHEMICALS MONITORING AND TRANSPORT
CLAUS PROCESS
DESULFURIZATION
FLUE GAS
HYDROLYSIS
MATERIALS RECOVERY
NOXIOUS GAS AND PARTICULATE EMISSIONS
OXIDATION
PROGRESS REPORT
REDUCTION
REGENERATION
SULFUR
SULFUR DIOXIDE
WASTE MANAGEMENT
WATER GAS PROCESSES