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Total Oxidation of Chlorinated Hydrocarbons on A 1–x Sr x MnO 3 Perovskite‐Type Oxide Catalysts – Part II: Catalytic Activity
Author(s) -
Stephan K.,
Hackenberger M.,
Kießling D.,
Wendt G.
Publication year - 2002
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/1521-4125(200205)25:5<565::aid-ceat565>3.0.co;2-h
Subject(s) - catalysis , chloromethane , chemistry , methane , calcination , trichloroethylene , dichloromethane , inorganic chemistry , partial oxidation , anaerobic oxidation of methane , catalytic oxidation , perovskite (structure) , oxide , crystallinity , organic chemistry , solvent , crystallography
The influence of the kind of A‐site cation in A 1–x Sr x MnO 3 perovskites (A = La, Pr, Nd, Di [didymium]) on the catalytic activity in the total oxidation of methane, chloromethane, dichloromethane, and trichloroethylene has been studied. In contrast to methane, the total oxidation of chlorinated hydrocarbons (CHC) is connected with a reversible catalyst deactivation and the formation of byproducts at low reaction temperatures. For the catalysts calcined at 600 and 800 °C, resp., the catalytic activity is determined mainly by specific surface area, amount of oxide admixtures and crystallinity of the perovskite. DiMnO 3 showed the highest and PrMnO 3 catalysts the lowest catalytic activity in the total oxidation of methane and CHC. Partial substitution of A by Sr leads to an enhancement of the catalytic activity in the total oxidation of methane, but not in the total oxidation of CHC.