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.

公开(公告)号：US20190015781A1

公开(公告)日：2019-01-17

申请号：US16068418

申请日：2017-01-05

Applicant: BASF Corporation

Inventor： Xinyi WEI ,  Xiaoming XU ,  Stanley ROTH

IPC: B01D53/94 ,  B01J23/42 ,  B01J35/00 ,  B01J35/04 ,  F01N3/10

Abstract: The present invention relates to diesel oxidation catalyst compositions and catalyst articles, wherein the compositions and articles include a plurality of platinum group nanoparticles substantially in fully reduced form, wherein the nanoparticles have an average particle size of about 1 to about 10 nm and at least about 90% of the nanoparticles have a particle size of +/− about 2 nm of the average particle size. Such compositions can further include a refractory metal oxide material, wherein the nanoparticles and refractory metal oxide material can be combined within the same coating on a substrate or can be applied sequentially on a substrate. The nanoparticles can advantageously be substantially free of halides, alkali metals, alkaline earth metals, sulfur compounds, and boron compounds. Methods of preparing and using such compositions and catalyst articles (e.g., for the treatment of diesel exhaust gas streams) are also provided herein.

公开(公告)号：US20180318805A1

公开(公告)日：2018-11-08

申请号：US15773705

申请日：2016-11-03

Applicant: BASF Corporation

Inventor： Oleg ILINICH ,  Stanley ROTH

IPC: B01J23/89 ,  B01J37/02 ,  B01J37/04 ,  B01J35/04 ,  F01N3/10 ,  F01N13/00 ,  F01N3/28 ,  B01D53/94

Abstract: A diesel oxidation catalyst composition is provided, the composition including at least one platinum group metal impregnated onto a porous refractory oxide material in particulate form and at least one base metal oxide impregnated onto a porous refractory oxide material in particulate form, wherein the porous refractory oxide material impregnated with at least one platinum group metal and the porous refractory oxide material impregnated with at least one base metal oxide are in the form of a mixture or wherein the at least one platinum group metal and the at least one base metal oxide are impregnated on the same porous refractory oxide material. The diesel oxidation catalyst provides synergistic enhancement of carbon monoxide oxidation as well as relatively unimpaired hydrocarbon oxidation. Methods of making and using the catalyst composition are also provided, as well as emission treatment systems comprising a catalyst article coated with the catalyst composition.