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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.

Inventors:
 [1];  [2]
  1. Winchester, MA
  2. Somerville, MA
Issue Date:
Research Org.:
Arthur D Little Inc
OSTI Identifier:
868911
Patent Number(s):
5242673
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
AC22-89PC89805
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
elemental; sulfur; recovery; process; improved; catalytic; reduction; direct; various; -containing; industrial; gas; streams; provides; combined; activity; selectivity; product; carbon; monoxide; reducing; gases; reaction; dioxide; takes; catalyst; formulations; based; cerium; oxide; single-stage; conjunction; regenerators; dry; regenerative; flue; desulfurization; processes; involving; regenerator; stream; presence; catalytic process; reducing gas; process provides; gas desulfurization; cerium oxide; elemental sulfur; carbon monoxide; gas stream; gas streams; sulfur dioxide; flue gas; recovery process; reduction process; catalytic reduction; reducing gases; catalyst formulations; sulfur recovery; improved catalytic; industrial gas; direct reduction; direct recovery; sulfur product; -containing industrial; /423/

Citation Formats

Flytzani-Stephanopoulos, Maria, and Hu, Zhicheng. Elemental sulfur recovery process. United States: N. p., 1993. Web.
Flytzani-Stephanopoulos, Maria, & Hu, Zhicheng. Elemental sulfur recovery process. United States.
Flytzani-Stephanopoulos, Maria, and Hu, Zhicheng. Fri . "Elemental sulfur recovery process". United States. https://www.osti.gov/servlets/purl/868911.
@article{osti_868911,
title = {Elemental sulfur recovery process},
author = {Flytzani-Stephanopoulos, Maria and Hu, Zhicheng},
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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Works referenced in this record:

Catalytic Reduction of Sulfur Dioxide with Carbon Monoxide on Cobalt Oxides
journal, December 1975


Catalytic Reduction of Sulfur Dioxide on Iron-Alumina Bifunctional Catalysts
journal, June 1971


Removal of Sulfur Dioxide from Stack Gases by Catalytic Reduction to Elemental Sulfur with Carbon Monoxide
journal, January 1973


Preparation of Cerium Dioxide Powders for Catalyst Supports
journal, February 1988