公开(公告)号：ZA201707086B

公开(公告)日：2021-04-28

申请号：ZA201707086

申请日：2017-10-19

Applicant: BASF CORP

Inventor： YANG XIAOFAN ,  XUE WEN-MEI ,  HOCHMUTH JOHN ,  SCHLADT MATTHEW ,  LI YUEJIN

Abstract: Described are exhaust gas treatment systems for treatment of a gasoline engine exhaust gas stream containing NOx, particulate matter, and sulfur. The exhaust gas treatment system comprises: one or more catalytic articles selected from a three-way conversion catalyst (TWC), a lean NOx trap (LNT), and an integrated LNT-TWC; a platinum-containing catalytic article downstream from the one or more catalytic articles; and one or more selective catalytic reduction (SCR) catalytic articles immediately downstream from the platinum-containing catalytic article, the one or more SCR catalytic articles including a molecular sieve. The system stabilizes the SCR catalytic article from poisoning by sulfur.