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Dual-catalyst Beds to Reduce Sulfur Dioxide to Elemental Sulfur in the Presence of Water Vapor.

Authors
Khalafalla-SE; Haas-LA
Source
Sulfur Removal & Recovery from Ind Proc Adv in Chem Ser (139):15 pages
Link
NIOSHTIC No.
10009595
Abstract
Water vapor decreases the effectiveness of an iron-alumina bifunctional catalyst in reducing sulfur dioxide with carbon monoxide. This problem can be averted by enriching the iron content in the bifunctional catalyst. The water-gas-shift reaction between water vapor and carbon monoxide generates an equivalent quantity of hydrogen. A post-catalyst bed of pure alumina must be used because of the hydrogen sulfide that is generated in the reduction step with hydrogen as well as that which is produced from the hydrolytic decomposition of the carbonyl sulfide byproduct. By deliberately releasing some sulfur dioxide (equal to half of the hydrogen sulfide produced) from the first catalyst, both pollutants can be suppressed by a claus reaction on a post-catalyst.
Publication Date
19750101
Document Type
OP;
Fiscal Year
1975
NTIS Accession No.
NTIS Price
Identifying No.
OP 66-75
Issue of Publication
139
NIOSH Division
TCRC;
Source Name
Sulfur Removal & Recovery from Ind Proc., Adv. in Chem. Ser., No. 139, Am. Chem. Soc., PP.60-74
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