Ammonia generation system for NOx emission control

    公开(公告)号:US11181028B2

    公开(公告)日:2021-11-23

    申请号:US16500270

    申请日:2018-04-03

    申请人: BASF CORPORATION

    发明人: Shiang Sung

    IPC分类号: F01N3/20 F01N13/00 F01N9/00

    摘要: The invention provides an emission control system for treatment of an exhaust gas stream of an engine, including an engine producing an exhaust gas stream; an SCR catalyst unit downstream from the engine and in fluid communication with the exhaust gas stream; and an ammonia generation system comprising a reservoir containing ammonium hydroxide and an ammonia injector, wherein the reservoir is in fluid communication with the ammonia injector and the ammonia injector is in fluid communication with the exhaust gas stream upstream of the SCR catalyst unit. A method of treating an exhaust gas stream of an engine is also provided, including the steps of heating ammonium hydroxide to produce gaseous ammonia and transferring the gaseous ammonia through an ammonia injector into the exhaust gas stream such that the gaseous ammonia disperses within the exhaust gas stream upstream of a SCR catalyst unit.

    SELECTIVE CATALYTIC REDUCTION ARTICLES AND SYSTEMS

    公开(公告)号:US20210229079A1

    公开(公告)日:2021-07-29

    申请号:US17206963

    申请日:2021-03-19

    申请人: BASF Corporation

    摘要: 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.

    ADVANCED NOX REDUCTION CATALYSTS
    58.
    发明申请

    公开(公告)号:US20210178380A1

    公开(公告)日:2021-06-17

    申请号:US17270125

    申请日:2019-07-30

    申请人: BASF CORPORATION

    发明人: Yuejin Li

    摘要: A selective catalytic reduction (SCR) catalyst composition effective in the abatement of nitrogen oxides (NOx) is provided. The SCR catalyst composition significantly increases the conversion of NOx relative to a Cu-chabazite reference catalyst composition at any temperature, and especially at low temperatures. A catalyst article, an exhaust gas treatment system, and a method of treating an exhaust gas stream, each including the SCR catalyst composition of the invention, are also provided. The SCR catalyst composition is particularly useful for treatment of exhaust from a lean-burn engine.

    PROCESS FOR PREPARATION OF AMINO ALCOHOLS

    公开(公告)号:US20210155575A1

    公开(公告)日:2021-05-27

    申请号:US17257080

    申请日:2019-07-02

    IPC分类号: C07C213/00

    摘要: A process for the preparation of amino alcohols includes condensing a compound of Formula (II), a stereoisomer, a tautomer, or a salt thereof with a compound of Formula (IIIa) or Formula (IIIb), a stereoisomer, a tautomer, or a salt thereof to form a condensation product; hydroxylating or acyloxylating the condensation product in the presence of an oxidant to obtain a hydroxylation or acyloxylation product; and subjecting the hydroxylation or acyloxylation product to one or more subsequent reactions comprising a hydrolysis reaction, alcohol deprotection, an amino lysis reaction, or a combination of two or more thereof to obtain an amino alcohol of Formula (I).