Elemental sulfur recovery process

Patent · Tue Sep 07 04:00:00 EDT 1993

OSTI ID:5351441

Flytzani-Stephanopoulos, M; Zhicheng, Hu

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
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
CATALYTIC EFFECTS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
MANAGEMENT
MATERIALS RECOVERY
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RARE EARTH COMPOUNDS
REDUCTION
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES