Patent ID: 9561469
Date: 2017-02-07
CPC Classifications: B01D,B01J,F01N,G06F,Y02C

Claim:
1. A method for reducing N 2 O emissions in an exhaust gas comprising contacting an exhaust gas containing NH 3 and an inlet NO concentration with an SCR catalyst composition containing small pore zeolite having an SAR of about 3 to about 15 and having about 1 - 5 wt. % of an exchanged transition metal to produce a purified gas containing an outlet NO concentration and an outlet N 2 O concentration, a. wherein the inlet NO concentration and outlet NO concentration have a relative ratio of > about 4, b. wherein the inlet NO concentration and outlet N c. wherein the small pore zeolite has a framework selected from AD, AFT, and AFX.