Influence of Impurities on Sulfur Removal from Coke-Oven Gas

The extraction of hydrogen sulfide from coke-oven gas by means of alkaline aqueous solutions occurs in the presence of several acidic components, which dissolve to form acids with different degrees of dissociation. The relation between the acidic components of the gas depends on the batch compositio...

Full description

Saved in:
Bibliographic Details
Published in:Coke and chemistry (New York, N.Y.) N.Y.), 2020-07, Vol.63 (7), p.332-343
Main Authors: Bannikov, L. P., Ovchinnikova, S. A., Suprun, V. V., Nesterenko, S. V.
Format: Article
Language:English
Subjects:
Aqueous solutions
Arsenic ions
Carbon dioxide
Chemistry
Chemistry and Materials Science
Coke oven gas
Coke ovens
Coking
Contaminants
Hydrogen cyanide
Hydrogen sulfide
Industrial Chemistry/Chemical Engineering
Oxidation
Selectivity
Sulfur
Sulfur content
Sulfur removal
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The extraction of hydrogen sulfide from coke-oven gas by means of alkaline aqueous solutions occurs in the presence of several acidic components, which dissolve to form acids with different degrees of dissociation. The relation between the acidic components of the gas depends on the batch composition and the corresponding coking conditions. The ratio H 2 S/CO 2 decreases on coking coal with low sulfur content and elevated calcium content and with an elevated content of gas coal. There is little scope for slowing the CO 2 absorption. The selectivity of H 2 S capture increases somewhat with increase in content of ballast salts. A general analysis of ballast-salt formation is proposed for circulatory and oxidative methods of sulfur removal. The influence of ballast salts on the activity of the absorbent solution in arsenic–soda sulfur removal is not critical. That may be explained in terms of As 5+ /As 3+ conversion. The oxidation of hydrogen cyanide by strong acids produces compounds that cannot be regenerated; recommendations are made for slowing that process. The influence of organic contaminants on the removal of sulfur from coke-oven gas is considered.
ISSN:1068-364X
1934-8398
DOI:10.3103/S1068364X20070030