公开(公告)号：US11724248B2

公开(公告)日：2023-08-15

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 ,  G01N21/35

CPC classification number: B01J29/044 ,  B01D53/9418 ,  B01D53/9468 ,  B01J23/42 ,  B01J35/04 ,  G01N21/3563 ,  B01D2255/102 ,  B01D2255/20761 ,  B01D2255/9022 ,  B01D2255/9155 ,  G01N2021/3595

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.

公开(公告)号：US20170333883A1

公开(公告)日：2017-11-23

申请号：US15522440

申请日：2015-10-30

Applicant: BASF Corporation

Inventor： Jaya L. Mohanan ,  Jeff Yang ,  Patrick Burk ,  Kenneth E. Voss

IPC: B01J29/76 ,  B01J29/80 ,  B01D53/94

Abstract: Described are compositions and catalytic articles comprising both a first molecular sieve promoted with copper and a second molecular sieve promoted with iron, the first and second molecular sieves having a d6r unit and the first molecular sieves having cubic shaped crystals with an average crystal size of about 0.5 to about 2 microns. The weight ratio of the copper-promoted molecular sieve to the iron-promoted molecular sieve can be about 1:1 to about 4:1. The catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

公开(公告)号：US10792648B2

公开(公告)日：2020-10-06

申请号：US15522440

申请日：2015-10-30

Applicant: BASF Corporation

Inventor： Jaya L. Mohanan ,  Jeff Yang ,  Patrick Burk ,  Kenneth E. Voss

IPC: B01J29/06 ,  B01J29/76 ,  B01D53/94 ,  B01J29/80 ,  B01D53/86 ,  B01J37/02 ,  B01J35/00 ,  C01B39/48 ,  B01J35/04 ,  B01J29/87 ,  B01J29/86 ,  B01J29/83 ,  B01J29/85 ,  B01J29/84 ,  B01J29/89

Abstract: Described are compositions and catalytic articles comprising both a first molecular sieve promoted with copper and a second molecular sieve promoted with iron, the first and second molecular sieves having a d6r unit and the first molecular sieves having cubic shaped crystals with an average crystal size of about 0.5 to about 2 microns. The weight ratio of the copper-promoted molecular sieve to the iron-promoted molecular sieve can be about 1:1 to about 4:1. The catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.