公开(公告)号：US20210229079A1

公开(公告)日：2021-07-29

申请号：US17206963

申请日：2021-03-19

Applicant: BASF Corporation

Inventor： Wen-Mei XUE ,  Xiaofan YANG ,  Haiyang ZHU ,  Stanley ROTH ,  Jeff YANG ,  Subramanian PRASAD ,  Ahmad MOINI

IPC: B01J29/04 ,  B01D53/94 ,  B01J23/42 ,  B01J35/04 ,  G01N21/3563

Abstract: The present disclosure relates to copper-containing molecular sieve catalysts that are highly suitable for the treatment of exhaust containing NOx pollutants. The copper-containing molecular sieve catalysts contain ion-exchanged copper as Cu+2 and Cu(OH)+1, and DRIFT spectroscopy of the catalyst exhibits perturbed T-O-T vibrational peaks corresponding to the Cu+2 and Cu(OH)+1. In spectra taken of the catalytic materials, a ratio of the Cu+2 to the Cu(OH)+1 peak integration areas preferably can be ≥1. The copper-containing molecular sieve catalysts are aging stable such that the peak integration area percentage of the Cu+2 peak (area Cu+2/(area Cu+2+area Cu(OH)+1)) increases by ≤20% upon aging at 800° C. for 16 hours in the presence of 10% H2O/air, compared to the fresh state.