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Title: Elemental sulfur recovery process

Abstract

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.

Inventors:
;
Issue Date:
Research Org.:
Arthur D Little Inc
OSTI Identifier:
5351441
Patent Number(s):
5242673 A
Application Number:
PPN: US 7-791491
Assignee:
Massachusetts Inst. of Tech., Cambridge, MA (United States)
DOE Contract Number:  
AC22-89PC89805
Resource Type:
Patent
Resource Relation:
Patent File Date: 12 Nov 1991
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 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

Citation Formats

Flytzani-Stephanopoulos, M, and Zhicheng, Hu. Elemental sulfur recovery process. United States: N. p., 1993. Web.
Flytzani-Stephanopoulos, M, & Zhicheng, Hu. Elemental sulfur recovery process. United States.
Flytzani-Stephanopoulos, M, and Zhicheng, Hu. Tue . "Elemental sulfur recovery process". United States.
@article{osti_5351441,
title = {Elemental sulfur recovery process},
author = {Flytzani-Stephanopoulos, M and Zhicheng, Hu},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {9}
}