公开(公告)号：US20220143579A1

公开(公告)日：2022-05-12

申请号：US17594311

申请日：2020-04-08

Applicant: BASF Corporation

Inventor： Yu Fen HAO ,  Yuejin LI ,  Stanley A. ROTH ,  Jan Martin BECKER ,  Stefan MAURER

IPC: B01J23/42 ,  B01J21/06 ,  B01J35/10 ,  B01J29/70 ,  F01N3/20

Abstract: The invention relates to a selective ammonia oxidation catalysts comprising a platinum group metal and a support comprising TiO2 doped with 0-10% by weight of SiO2, WO3, ZrO2, Y2O3, La2O3, or a mixture thereof. The invention further comprises methods for the manufacture of the selective ammonia oxidation catalysts, and integrated catalyst systems comprising the selective ammonia oxidation catalysts for treating an exhaust gas stream.

公开(公告)号：US20210388747A1

公开(公告)日：2021-12-16

申请号：US17309116

申请日：2019-10-24

Applicant: BASF Corporation

Inventor： Wen-Mei XUE ,  Ivan PETROVIC ,  Jeff H. YANG ,  Stanley A. ROTH ,  Yuejin LI

IPC: F01N3/20 ,  B01J29/72 ,  B01J35/02 ,  B01J37/03 ,  B01J35/04 ,  B01J37/02 ,  B01J35/00

Abstract: The present disclosure provides catalyst compositions for NOx conversion and catalytic articles incorporating such catalyst compositions. Certain catalyst compositions include a zeolite with a silica-to-alumina ratio from 5 to 20 and sufficient Cu exchanged into cation sites of the zeolite such that the zeolite has a Cu/Al ratio of 0.1 to 0.5 and a CuO loading of 1 to 15 wt. %; and a copper trapping component in a concentration in the range of 1 to 20 wt. %, the copper trapping component including a plurality of particles having a particle size of about 0.5 to 20 microns. Certain catalyst compositions include, as the copper trapping component, alumina present as a plurality of alumina particles with a D90 particle size distribution in the range of 0.5 microns to 20 microns.