Elemental sulfur recovery process

Details Elemental sulfur recovery process Elemental sulfur recovery process

1991-11-12

1993-09-07

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

42324419, 4232441, 423416, C01B 1702, C01G 104

Patent

active

052426734

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.

REFERENCES:
patent: 3454355 (1969-07-01), Ryason et al.
patent: 3653833 (1972-04-01), Watson et al.
patent: 3755551 (1973-08-01), Bridwell et al.
patent: 3864459 (1975-02-01), Stiles
patent: 3978200 (1976-08-01), Bajars
patent: 4001375 (1977-01-01), Longo
patent: 4081519 (1978-03-01), Whelan
patent: 4251496 (1981-02-01), Longo et al.
patent: 4346063 (1982-08-01), Cahn et al.
patent: 4826664 (1989-05-01), Kay et al.
patent: 4857296 (1989-08-01), Brunelle et al.
Hunter, Jr. et al., "The Allied Chemical Sulfur Dioxide Reduction Process For Metallurical Emissions," Advances in Chemistry Series, No. 139, p. 48 American Chemical Society, 1975.
Kwong et al., "The Parsons FGC Process Simultaneous Removal of SO.sub.X and NO.sub.X " Presented at the 1990 Annual Meeting of AICHE, Chicago, Ill. Nov. 11-16, 1990.
Querido and Short, "Removal of Sulfur Dioxide from Stack Gases by Catalytic Reduction to Elemental Sulfur with Carbon Monoxide," Ind. Eng. Chem. Process Des. Develop., vol. 12, No. 1, p. 10, 1973.
Khalafalla et al., "Catalytic Reduction of Sulfur Dioxide on Iron-Alumina Bifunctional Catalysts,"0 Ind. Eng. Chem. Prod. Res. Develop., vol. 10, No. 2, p. 133, 1971.
Bazes et al., "Catalytic Reduction of Sulfur Dioxide with Carbon Monoxide on Cobalt Oxides," Ind. Eng. Chem., Prod. Res. Develop., vol. 14, No. 4 p. 264, 1975.
Hibbert and Campbell, "Flue Gas Desulfurization: Catalytic Removal of Sulfur Dioxide by Carbon Monoxide on Sulfided La.sub.1-x Sr.sub.x CoO.sub.3 ", Applied Catalysis, vol. 41, p. 289, 1988.
Hass et al., "Packaged Selectox UNITS--A New Approach to Sulfur Recovery," presented at 60th Annual GPA Convention, Mar. 23-25, 1991 San Antonio, Tex.
Powell et al., "Preparation of Cerium Dioxide Powders for Catalyst Supports," J. Am. Ceram. Soc., vol. 71, C-104-C-106, 1988.
Courty et al., "The Preparation of Highly Dispersed Mixed Oxides and Oxide Solid Solutions by the Pyrolysis of Amorphous Precursors," (in French), Powder Technol., vol. 7, p. 21, 1973.
Dorchak and Gangwal, "Direct Sulfur Recovery Process for Elemental Sulfur Recovery From Gas," ACS Div. Fuel Chemistry, vol. 35, No. 1, p. 207, 1990.
United States Department of Energy, Morgantown Energy Research Center, "Chemistry of Hot Gas Cleanup in Coal Gasification and Combustion," Feb. 1978.
Gilbert, "The NOXSO POC Pilot Plant Advanced Flue Gas Clean-Up Technology," 6th Annual Coal Prep'n., and Environ. Control Contractor Conference Proceedings, Aug. 1990, Pittsburgh.

Affiliated with

Also associated with

Rating

Elemental sulfur recovery process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Elemental sulfur recovery process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elemental sulfur recovery process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-485930