Method of NOx abatement in high temperature lean NOx catalyst systems

摘要

A method of NOx abatement comprising the steps of generating a gas stream containing hydrocarbons and NOx, maintaining the temperature of the gas stream within the range of about 150 C. to about 550 C., maintaining the residence time of said hydrocarbons upstream of a NOx abatement catalyst so as to reduce the rate of hydrocarbon oxidation, and contacting the gas stream with said NOx abatement catalyst.