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    Nitrogen Oxide Oxidation Activity of Pseudo-Brookite Compositions as Zero-PGM Catalysts for Diesel Oxidation Applications
    1.
    发明申请
    Nitrogen Oxide Oxidation Activity of Pseudo-Brookite Compositions as Zero-PGM Catalysts for Diesel Oxidation Applications 审中-公开

    公开(公告)号：US20180290128A1

    公开(公告)日：2018-10-11

    申请号：US15765225

    申请日：2016-09-30

    申请人： CLEAN DIESEL TECHNOLOGIES, INC.

    发明人： Zahra Nazarpoor ,  Stephen J. Golden

    IPC分类号： B01J23/83 ,  B01J6/00

    摘要： Zero-PGM (ZPGM) catalyst materials including pseudo-brookite compositions for use in diesel oxidation catalyst (DOC) applications are disclosed. The disclosed doped pseudo-brookite compositions include A-site partially doped pseudo-brookite compositions, such as, Sr-doped and Ce-doped pseudo-brookite compositions, as well as B-site partially doped pseudo-brookite compositions, such as, Fe-doped, Co-doped Ni-doped, and Ti-doped pseudo-brookite compositions. The disclosed doped pseudo-brookite compositions, including calcination at various temperatures, are subjected to a DOC standard light-off (LO) test methodology to assess/verify catalyst activity as well as to determine the effect of the use of a dopant in an A-site cation or a B-site cation within a pseudo-brookite composition. The disclosed doped pseudo-brookite compositions exhibit higher NO oxidation catalyst activities when compared to bulk powder pseudo-brookite, thereby indicating improved thermal stability and catalyst activity when using a dopant in an A-site cation or in a B-site cation within a pseudo-brookite composition.

    Highly active and thermally stable coated gasoline particulate filters
    8.
    发明授权
    Highly active and thermally stable coated gasoline particulate filters 有权

    公开(公告)号：US10265684B2

    公开(公告)日：2019-04-23

    申请号：US15586394

    申请日：2017-05-04

    申请人： Clean Diesel Technologies, Inc.

    发明人： Randal L. Hatfield

    IPC分类号： B01J23/89 ,  B01J35/00 ,  B01J35/04 ,  B01J21/16 ,  B01J37/02 ,  F01N3/10 ,  F01N3/035 ,  B01D53/94 ,  F01N3/022

    摘要： Coated gasoline particulate filters (cGPFs) that are produced according to varied material compositions and catalyst configurations are disclosed. The cGPFs include Fe—Ce (rich)-activated Rh compositions that provide greater catalytic functionality. These cGPFs are incorporated within engine systems as components of TWC systems for controlling and reducing engine exhaust emissions. The conversion performance of these TWC systems is assessed and compared employing worldwide harmonized light duty test cycle (WLTC) protocol within a gasoline fueled internal combustion engine. These TWC systems exhibit a significant catalytic performance when compared with the catalytic performance of a PGM-based Original Equipment Manufacturer (OEM) catalyst employed in TWC applications. Further, TWC catalysts are produced including Fe-activated Rh layers comprising dopant elements. The catalytic performance of the TWC catalysts is evaluated by performing light-off and standard isothermal oxygen storage capacity oscillating tests. The TWC catalysts exhibit improved catalytic performance and significant oxygen storage capacity.