Kinetics and macrokinetics of the high-temperature reduction of potassium sulfate by hydrogen. I. Experimental results and reaction mechanism

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · Kinet. Catal. (Engl. Transl.); (United States)

OSTI ID:7001896

Ibragimov, V A; Mostinskii, I L; Rozovskii, A Ya; Zyryanov, S I

A study was carried out on the kinetics of the heterogeneous reduction of potassium sulfate (50 micro mean particle size) by hydrogen at 1033-1073/sup 0/K in a quartz flow reactor at atmospheric pressure. Measurements were carried out for the temperatures of the gas flow and sample and the condensed phase and exit gases were subjected to chemical analysis. The reduction products are liquid potassium sulfide, potassium polysulfides, and potassium hydroxide and gaeous water and hydrogen sulfide. Two mechanistic variants were proposed for the reduction of potassium sulfate by hydrogen. The initial product above 1033 /sup 0/K is potassium sulfide while potassium sulfide, which is formed from the sulfate below 1033/sup 0/K, is bound in the K/sub 2/SO/sub 4/ /SUP ./ 3K/sub 2/S complex such that the major primary product becomes potassium disulfide K/sub 2/S/sub 2/. Hydrogen sulfide is formed as a result of the reaction of K/sub 2/S with H/sub 2/O and K/sub 2/S/sub 2/ with H/sub 2/.

• Research Organization: Institute of High Temperature, Academy of Sciences of the USSR, Moscow
• OSTI ID: 7001896
• Journal Information: Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 26:6; ISSN KICAA
• Country of Publication: United States
• Language: English

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500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORBENTS
AIR POLLUTION ABATEMENT
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
GASES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXIDES
KINETICS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
POTASSIUM SULFATES
POTASSIUM SULFIDES
POWER PLANTS
REACTION KINETICS
REDUCTION
REGENERATION
SULFATES
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
VAPORS
WATER VAPOR
YIELDS