Elemental sulfur recovery process
An improved catalytic reduction process for the direct recovery of elemental sulfur from various SO[sub 2]-containing industrial gas streams. The catalytic process provides combined high activity and selectivity for the reduction of SO[sub 2] to elemental sulfur product with carbon monoxide or other reducing gases. The reaction of sulfur dioxide and reducing gas takes place over certain catalyst formulations based on cerium oxide. The process is a single-stage, catalytic sulfur recovery process in conjunction with regenerators, such as those used in dry, regenerative flue gas desulfurization or other processes, involving direct reduction of the SO[sub 2] in the regenerator off gas stream to elemental sulfur in the presence of a catalyst. 4 figures.
- Research Organization:
- Arthur D Little Inc
- DOE Contract Number:
- AC22-89PC89805
- Assignee:
- Massachusetts Inst. of Tech., Cambridge, MA (United States)
- Patent Number(s):
- US 5242673; A
- Application Number:
- PPN: US 7-791491
- OSTI ID:
- 5351441
- Resource Relation:
- Patent File Date: 12 Nov 1991
- 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
Related Subjects
01 COAL, LIGNITE, AND PEAT
CERIUM OXIDES
CATALYTIC EFFECTS
SULFUR
MATERIALS RECOVERY
SULFUR DIOXIDE
REDUCTION
EXHAUST GASES
CERIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
GASEOUS WASTES
GASES
MANAGEMENT
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RARE EARTH COMPOUNDS
SULFUR COMPOUNDS
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010800 - Coal
Lignite
& Peat- Waste Management