Catalyst for elemental sulfur recovery process
Abstract
A catalytic reduction process is described for the direct recovery of elemental sulfur from various SO[sub 2]-containing industrial gas streams. The catalytic process provides high activity and selectivity, as well as stability in the reaction atmosphere, 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 a metal oxide composite catalyst having one of the following empirical formulas: [(FO[sub 2])[sub 1[minus]n](RO)[sub n]][sub 1[minus]k]M[sub k], [(FO[sub 2])[sub 1[minus]n](RO[sub 1.5])[sub n]][sub 1[minus]k]M[sub k], or [Ln[sub x]Zr[sub 1[minus]x]O[sub 2[minus]0.5x]][sub 1[minus]k]M[sub k] wherein FO[sub 2] is a fluorite-type oxide; RO represents an alkaline earth oxide; RO[sub 1.5] is a Group IIIB or rare earth oxide; Ln is a rare earth element having an atomic number from 57 to 65 or mixtures thereof; M is a transition metal or a mixture of transition metals; n is a number having a value from 0.0 to 0.35; k is a number having a value from 0.0 to about 0.5; and x is a number having a value from about 0.45 to about 0.55.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 6884348
- Patent Number(s):
- 5384301 A
- Application Number:
- PPN: US 8-097367
- Assignee:
- Massachusetts Institute of Technology, Cambridge, MA (United States)
- DOE Contract Number:
- FG22-92PC92534
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 23 Jul 1993
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; CATALYSTS; CHEMICAL COMPOSITION; GASEOUS WASTES; MATERIALS RECOVERY; SULFUR; SULFUR DIOXIDE; REDUCTION; ALKALINE EARTH METAL COMPOUNDS; FLUORINE COMPOUNDS; INDUSTRIAL WASTES; OXIDES; RARE EARTH COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; ELEMENTS; HALOGEN COMPOUNDS; MANAGEMENT; NONMETALS; OXYGEN COMPOUNDS; PROCESSING; SULFUR COMPOUNDS; SULFUR OXIDES; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; 320305* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management
Citation Formats
Flytzani-Stephanopoulos, M, and Liu, W. Catalyst for elemental sulfur recovery process. United States: N. p., 1995.
Web.
Flytzani-Stephanopoulos, M, & Liu, W. Catalyst for elemental sulfur recovery process. United States.
Flytzani-Stephanopoulos, M, and Liu, W. Tue .
"Catalyst for elemental sulfur recovery process". United States.
@article{osti_6884348,
title = {Catalyst for elemental sulfur recovery process},
author = {Flytzani-Stephanopoulos, M and Liu, W},
abstractNote = {A catalytic reduction process is described for the direct recovery of elemental sulfur from various SO[sub 2]-containing industrial gas streams. The catalytic process provides high activity and selectivity, as well as stability in the reaction atmosphere, 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 a metal oxide composite catalyst having one of the following empirical formulas: [(FO[sub 2])[sub 1[minus]n](RO)[sub n]][sub 1[minus]k]M[sub k], [(FO[sub 2])[sub 1[minus]n](RO[sub 1.5])[sub n]][sub 1[minus]k]M[sub k], or [Ln[sub x]Zr[sub 1[minus]x]O[sub 2[minus]0.5x]][sub 1[minus]k]M[sub k] wherein FO[sub 2] is a fluorite-type oxide; RO represents an alkaline earth oxide; RO[sub 1.5] is a Group IIIB or rare earth oxide; Ln is a rare earth element having an atomic number from 57 to 65 or mixtures thereof; M is a transition metal or a mixture of transition metals; n is a number having a value from 0.0 to 0.35; k is a number having a value from 0.0 to about 0.5; and x is a number having a value from about 0.45 to about 0.55.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}