Oxidation of sulfur by oxygen in presence of hydrogen chloride
It is believed that sulfur trioxide is formed first during the combustion of sulfur, because the change of Gibbs energy during its formation has a larger negative value than its change during formation of sulfur dioxide. Subsequently the SO/sub 3/ decomposes under the influence of high temperature, or interacts with sulfur to form sulfur dioxide. In order to prevent these undesirable processes it was recommended to cool the combustion gases or to introduce a substance binding sulfur trioxide into the reaction mixture, thereby preventing its interaction with sulfur. Hydrochloric acid, which can form chlorosulfonic acid with sulfur trioxide, was used for this purpose. We accordingly examined the thermodynamics and studied the kinetics of sulfur oxidation by oxygen in presence of HCl in wide ranges of temperature, component concentrations, and reaction time. The influence of HCl on the yield of sulfur trioxide during oxidation of sulfur by oxygen is not determined by simple interaction of SO/sub 3/ with HCl, but involves formation of CL/sub 2/, which oxidizes the SO/sub 2/ formed to sulfonyl chloride at the stage of cooling of the reaction mixture; the sulfonyl chloride is then hydrolyzed by water to H/sub 2/SO/sub 4/ and HCl. In order to raise the SO/sub 3/ yield, oxidation of sulfur in presence of HCl must be conducted in presence of a catalyst active in the reaction of CL/sub 2/ formation.
- OSTI ID:
- 5829260
- Journal Information:
- J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 61:6; ISSN JAPUA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACTIVATION ENERGY
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORIDES
CHLORINE
CHLORINE COMPOUNDS
COMBUSTION
COMBUSTION KINETICS
COPPER CHLORIDES
COPPER COMPOUNDS
COPPER HALIDES
DECOMPOSITION
ELEMENTS
ENERGY
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROLYSIS
INORGANIC ACIDS
KINETICS
LYSIS
NONMETALS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
REACTION KINETICS
SOLVOLYSIS
SULFUR
SULFUR COMPOUNDS
SULFUR OXIDES
SULFUR TRIOXIDE
SULFURIC ACID
THERMOCHEMICAL PROCESSES
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
YIELDS