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    System and Process for Efficient SCR at High NO2 to NOx Ratios
    5.
    发明申请
    System and Process for Efficient SCR at High NO2 to NOx Ratios 有权

    公开(公告)号：US20210180791A1

    公开(公告)日：2021-06-17

    申请号：US16709954

    申请日：2019-12-11

    Applicant: Umicore AG & Co. KG

    Inventor： Kim Hougaard Pedersen ,  Wayne S. Jones ,  David Taylor

    IPC: F23R3/40 ,  B01D53/86 ,  B01D53/90

    Abstract: Disclosed herein is a system for the removal of volatile organic compounds, carbon monoxide and nitrogen oxides from off-gas even at high NO2 to NOx ratios, wherein the amount of NO2 within NOx is higher than or equal to 50 mol-%, comprising a source of ammonia, means for introducing ammonia into a catalytic article having an SCR functionality; a catalytic article having both an oxidation and an SCR functionality, the catalytic article comprising a catalyst substrate and a catalyst composition comprising at least one platinum group metal and/or at least one platinum group metal oxide, at least one oxide of titanium and at least one oxide of vanadium, wherein the washcoat is located in and/or on the walls of the catalyst substrate: means for measuring the amount of NOx and/or the ammonia slip between the outlet end of the catalytic article and the stack or at the stack, at least one carbon monoxide source, and means for introducing carbon monoxide into the catalytic article. Optionally, an SCR catalytic article can be placed upstream of downstream of the cata-lytic article having both an oxidation and an SCR functionality. Also disclosed is a method for the removal of volatile organic compounds, carbon monoxide and nitrogen oxides from off-gas introducing carbon monoxide in order to keep the amount of NOx and/or the ammonia slip between the outlet end of the catalytic article and the stack or at the stack at predetermined values. The method makes use of the system according to the invention. The system and the method can be used for the cleaning of flue gas.

    Combustion turbine and heat recovery system combination with SCR reactor assembly, and methods of assembling and using the same
    6.
    发明授权
    Combustion turbine and heat recovery system combination with SCR reactor assembly, and methods of assembling and using the same 有权

    公开(公告)号：US11635010B1

    公开(公告)日：2023-04-25

    申请号：US17494434

    申请日：2021-10-05

    Applicant: Umicore AG & Co. KG

    Inventor： Joseph Craig Sharp ,  Wayne Spencer Jones ,  Kim Hougaard Pedersen

    IPC: F01N3/20 ,  B01D53/94

    Abstract: An apparatus for reducing emissions that has a combustion turbine that feeds exhaust into a heat recovery steam generator (or HRSG) casing in which is positioned an emission reduction system featuring, in gas flow sequence, a first reducing reductant injector (RRI1), as in an ammonia injection grid, for providing reducing reductant, preferably ammonia, into turbine exhaust travelling within the HRSG, followed by a first SCR reactor positioned downstream of the first RRI1, followed by one of either (i) a turbulence generator (TG) as in a static mixer, or (ii) a second RRI2 as in a second ammonia injection grid, or (iii) an RRI2 with integrated TG supported on injectors of RRI2, then followed by a second SCR reactor. The emission reduction system preferably is free of a separate body oxidation catalyst or a separate body ammonia slip catalyst in an effort to utilize a limited volume within the HRSG. Methods of assembling and operating the ERS or T-H combination with ERS are also featured.

    System and process for efficient SCR at high NO2 to NOx ratios
    7.
    发明授权
    System and process for efficient SCR at high NO2 to NOx ratios 有权

    公开(公告)号：US11378278B2

    公开(公告)日：2022-07-05

    申请号：US16709954

    申请日：2019-12-11

    Applicant: Umicore AG & Co. KG

    Inventor： Kim Hougaard Pedersen ,  Wayne S. Jones ,  David Taylor

    IPC: B01D53/86 ,  B01D53/90 ,  F23R3/40

    Abstract: Disclosed herein are methods and systems for the removal of volatile organic compounds, carbon monoxide and nitrogen oxides from off-gas, which systems comprise a source of ammonia, means for introducing ammonia into a catalytic article having an SCR functionality; a catalytic article having both an oxidation and an SCR functionality, the catalytic article comprising a catalyst substrate and a catalyst composition comprising at least one platinum group metal and/or at least one platinum group metal oxide, at least one oxide of titanium and at least one oxide of vanadium, wherein the washcoat is located in and/or on the walls of the catalyst substrate: means for measuring the amount of NOx and/or the ammonia slip between the outlet end of the catalytic article and the stack or at the stack, at least one carbon monoxide source, and means for introducing carbon monoxide into the catalytic article.

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