Kinetics and macrokinetics of the high-temperature reduction of potassium sulfate by hydrogen. II. Kinetic model

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

OSTI ID:7001890

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

A physical model was developed for the heterogeneous high-temperature reduction of potassium sulfate by hydrogen. A three-phase system consisting of a gas, liquid, and solid composed of spherical particles was examined. In this model, the liquid and dissolved gaseous products form a growing film on the solid surface of the sulfate particles which decreases in size over time. The major reaction steps involve the dissolution of hydrogen and desorption of water vapor and hydrogen sulfide on the external liquid gas surface, diffusion of the gaseous components in the liquidfilm, and the reaction in the film bulk and on the internal solid-liquid surface. In the proposed mathematical mode, the primary surface reaction of potassium sulfate with hydrogen is described by the Roginskii-Shul'ts equation. The analytical solution of the system of differential equations in this model satisfactorily described the reduction kinetics in the temperature range studied.

• Research Organization: Institute of High Temperatures, Academy of Sciences of the USSR, Moscow
• OSTI ID: 7001890
• 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

Related Subjects

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