Kinetic studies of trichloroethylene catalytic combustion over Cr/ZSM-5/PSSF composite

摘要

The Cr modified ZSM-5 zeolite catalysts deposited on paper-like sintered stainless steel fibers (Cr/ZSM-5/PSSF) were synthesized via the papermaking/sintering technology, secondary growth process as well as metallic organic chemical vapor deposition method. Catalytic reaction kinetics analysis of trichloroethylene (TCE) over the fixed-bed reactor based on Cr modified ZSM-5 composite were performed using the Mars-van Krevelen and power-rate law kinetic model. The analysis results indicate that the Mars-van Krevelen kinetic model could fit well the catalytic kinetic data. The catalytic reaction for TCE combustion over Cr/ZSM-5/PSSF composite is the interaction between the oxygen-rich centers and TCE molecule based on the oxidation-reduction mechanism. The reaction activation energy for the surface oxidation is 64.57 kJ/mol and that of surface reduction reaction is 122.25 kJ/mol.

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