Oxidative methods of removing sulfur and cyanide from coke-oven gas and prospects for their utilization
The experimental investigation on oxidative ammonia removal of hydrogen sulfide and hydrogen cyanide from a coke-oven gas typical of plants in the East showed that not less than 95% purification of the gas is achieved when using a catalyst of the quinone group at the normally recommended concentrations. The efficiency of the absorption apparatus should be not below 3 to 4 theoretical stages. The degree of purification is regulated by the specific irrigation depending on the temperature. At temperatures not exceeding 30/sup 0/C a specific irrigation rate of 12 l/m/sup 3/ is sufficient, while at 40/sup 0/C it should be increased to 40 l/m/sup 3/. The principal product of the reaction is ammonium thiocyanate. The consumption of hydrogen sulfide for its formation is determined by the hydrogen cyanide concentration in the gas. The residual hydrogen sulfide is oxidized to sulfur, thiosulfate and sulfate. For eastern plants a system of combined removal of hydrogen sulfide and hydrogen cyanide should be used. The prospects for using the oxidative method are related to the utilization of the resulting salts. Possible utilization methods are decomposition of the salts by one of the methods used in other countries, separation of commercial products such as thiocyanate from the salts, and use of the salts in the coking process. All these examples require special development, especially since the problem of utilization of the salts should also be solved to eliminate wastes in cyclic gas purification methods.
- OSTI ID:
- 5730655
- Journal Information:
- Coke Chem. USSR (Engl. Transl.); (United States), Journal Name: Coke Chem. USSR (Engl. Transl.); (United States) Vol. 4; ISSN COKCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010401* -- Coal & Coal Products-- Carbonization-- (-1987)
010404 -- Coal
Lignite
& Peat-- Gasification
AMMONIA
ANTITHYROID DRUGS
CARBONIC ACID DERIVATIVES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GAS
CYANIDES
DATA
DRUGS
EXPERIMENTAL DATA
FLUIDS
GASES
HORMONE ANTAGONISTS
HYDRIDES
HYDROCYANIC ACID
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
INORGANIC ACIDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
PURIFICATION
REMOVAL
SCRUBBING
SULFIDES
SULFUR COMPOUNDS
THIOCYANATES