Rate-determining stage in NOSCR with propane on low-exchanged Cu-ZSM-5 catalyst

The kinetics of the NO SCR with propane has been studied on a low-exchanged Cu-ZSM-5 catalyst. The study of the kinetics of individual reaction stages (2-nitrosopropane isomerization to acetone oxime and reaction of adsorbed acetone oxime with gaseous NO) has shown that the NO reaction with acetone oxime is the rate-determining stage in the whole chain of transformations l eading to the formation of molecular nitrogen in the low-temperature region below 300 C-degrees. The kinetic analysis of the reaction has revealed tha t at the temperatures above 300(degrees)C propane plays a more important ro le.