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Title: Removing sulfur dioxide by carbon monoxide reduction. [15 refs]

Abstract

The feasibility of removing sulfur dioxide by carbon monoxide reduction in a fixed-bed catalytic reactor was investigated by the Bureau of Mines. The reduction rate of sulfur dioxide with carbon monoxide was significantly dependent upon the iron and alumina content of the mixed catalyst. Maximum catalytic activity was obtained with about 40 percent iron-alumina mixture with a nominal gas mixture of 10 percent carbon monoxide, 5 percent sulfur dioxide, and the balance nitrogen. The synergistic effect of this catalyst mixture was explained by a dual reaction site mechanism, with both iron and alumina augmenting their specific sites at their interparticle contacts. The catalytic activity also increased with decreasing catalyst pellet size. With 0.7-mm pellets, the entire pellet appeared to be catalytically active in a 2-gram catalyst bed. The apparent activation energy of the reaction was 18.3 kcal/mole in the temperature range of 350 to 600/sup 0/C. Carbonyl sulfide (COS) was produced by the interaction of carbon monoxide and sulfur. The amount decreased with decreasing CO concentration. The ratio of COS formed per SO/sub 2/ removed reached a maximum at about 400/sup 0/C. The reaction rate appeared to be independent of SO/sub 2/ concentration in the range of 0.2 to 16more » percent. The rate, however, increased directly with the CO concentration in the range of 5 to 20 percent. The presence of CO/sub 2/ (<15 percent) had no appreciable effect on the rate. However, not over 0.5 percent oxygen could be tolerated. This method appears feasible for removing SO/sub 2/ from waste gas if the oxygen is removed prior to the catalytic SO/sub 2/ reduction process.« less

Authors:
; ;
Publication Date:
Research Org.:
Bureau of Mines, Twin Cities, MN (USA). Twin Cities Metallurgy Research Center
OSTI Identifier:
7216240
Report Number(s):
BM-RI-7483
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; ALUMINIUM OXIDES; CATALYTIC EFFECTS; FLUE GAS; DESULFURIZATION; IRON; SULFUR DIOXIDE; REDUCTION; REMOVAL; ACTIVATION ENERGY; CARBON MONOXIDE; CATALYSTS; CHEMICAL REACTION KINETICS; CHEMICAL REACTORS; FEASIBILITY STUDIES; NITROGEN; PARTICLE SIZE; SYNERGISM; ALUMINIUM COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; CRYOGENIC FLUIDS; ELEMENTS; ENERGY; FLUIDS; GASEOUS WASTES; KINETICS; METALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; SIZE; SULFUR COMPOUNDS; SULFUR OXIDES; TRANSITION ELEMENTS; WASTES; 010800* - Coal, Lignite, & Peat- Waste Management

Citation Formats

Haas, L A, McCormick, T H, and Khalafalla, S E. Removing sulfur dioxide by carbon monoxide reduction. [15 refs]. United States: N. p., 1971. Web.
Haas, L A, McCormick, T H, & Khalafalla, S E. Removing sulfur dioxide by carbon monoxide reduction. [15 refs]. United States.
Haas, L A, McCormick, T H, and Khalafalla, S E. Mon . "Removing sulfur dioxide by carbon monoxide reduction. [15 refs]". United States.
@article{osti_7216240,
title = {Removing sulfur dioxide by carbon monoxide reduction. [15 refs]},
author = {Haas, L A and McCormick, T H and Khalafalla, S E},
abstractNote = {The feasibility of removing sulfur dioxide by carbon monoxide reduction in a fixed-bed catalytic reactor was investigated by the Bureau of Mines. The reduction rate of sulfur dioxide with carbon monoxide was significantly dependent upon the iron and alumina content of the mixed catalyst. Maximum catalytic activity was obtained with about 40 percent iron-alumina mixture with a nominal gas mixture of 10 percent carbon monoxide, 5 percent sulfur dioxide, and the balance nitrogen. The synergistic effect of this catalyst mixture was explained by a dual reaction site mechanism, with both iron and alumina augmenting their specific sites at their interparticle contacts. The catalytic activity also increased with decreasing catalyst pellet size. With 0.7-mm pellets, the entire pellet appeared to be catalytically active in a 2-gram catalyst bed. The apparent activation energy of the reaction was 18.3 kcal/mole in the temperature range of 350 to 600/sup 0/C. Carbonyl sulfide (COS) was produced by the interaction of carbon monoxide and sulfur. The amount decreased with decreasing CO concentration. The ratio of COS formed per SO/sub 2/ removed reached a maximum at about 400/sup 0/C. The reaction rate appeared to be independent of SO/sub 2/ concentration in the range of 0.2 to 16 percent. The rate, however, increased directly with the CO concentration in the range of 5 to 20 percent. The presence of CO/sub 2/ (<15 percent) had no appreciable effect on the rate. However, not over 0.5 percent oxygen could be tolerated. This method appears feasible for removing SO/sub 2/ from waste gas if the oxygen is removed prior to the catalytic SO/sub 2/ reduction process.},
doi = {},
url = {https://www.osti.gov/biblio/7216240}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1971},
month = {3}
}

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