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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

    Applicant: CLEAN DIESEL TECHNOLOGIES, INC.

    Inventor： Zahra Nazarpoor ,  Stephen J. Golden

    IPC: B01J23/83 ,  B01J6/00

    Abstract: 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.

    Optimization of Zero-PGM washcoat and overcoat loadings on metallic substrate
    4.
    发明授权
    Optimization of Zero-PGM washcoat and overcoat loadings on metallic substrate 有权
    金属基底上的零PGM修补基面涂层和外涂层负载的优化

    公开(公告)号：US09545626B2

    公开(公告)日：2017-01-17

    申请号：US13941015

    申请日：2013-07-12

    Applicant: Clean Diesel Technologies, Inc.

    Inventor： Zahra Nazarpoor ,  Sen Kitazumi ,  Johnny T. Ngo

    IPC: B01J23/72 ,  B01J37/02 ,  B01J23/50 ,  B01J23/83 ,  B01D53/94

    CPC classification number: B01J37/0244 ,  B01D53/944 ,  B01D2255/104 ,  B01D2255/2065 ,  B01D2255/20707 ,  B01D2255/20715 ,  B01D2255/20761 ,  B01D2255/65 ,  B01D2255/9022 ,  B01D2255/908 ,  B01J23/50 ,  B01J23/72 ,  B01J23/83

    Abstract: The present disclosure refers to a plurality of process employed for optimization of Zero-PGM washcoat and overcoat loadings on metallic substrates. According to an embodiment a substantial increase in conversion of HC and CO may be achieved by optimizing the total washcoat and overcoat loadings of the catalyst. According to another embodiment, the present disclosure may provide solutions to determine the optimum total washcoat and overcoat loadings for minimizing washcoat adhesion loss. As a result, may increase the conversion of HC and CO from discharge of exhaust gases from internal combustion engines, optimizing performance of Zero-PGM catalyst systems.

    Abstract translation: 本公开涉及用于在金属基材上优化零PGM修补基面涂层和外涂层负载的多种方法。 根据一个实施方案，可以通过优化催化剂的总修补基面涂层和外涂层负载量来实现HC和CO的转化率的显着增加。 根据另一个实施方案，本公开可提供用于确定用于最小化洗涂层粘附损失的最佳总修补基面涂层和外涂层负载量的解决方案。 因此，可能会增加HC和CO从内燃机废气排放中的转化，从而优化Zero-PGM催化剂体系的性能。

    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

    Applicant: Clean Diesel Technologies, Inc.

    Inventor： Randal L. Hatfield

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

    Abstract: 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.

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