专利名称：LNT and SCR catalysts for combined LNT-SCR applications
发明人：Chigapov, Albert,Carberry,
Brendan,Ukropec, Robert
申请号：EP11152233.0申请日：20110126公开号：EP2481473A2公开日：20120801
专利附图：
摘要：The current invention refers to the LNT and the SCR catalysts designed forcombined LNT-SCR applications. LNT catalysts are based on proton- conducting oxides of
fluorite structure, namely Ca (Sr)-La-Ce (Zr, Pr) mixed oxides in which up to 40 mol-% oflanthanum is replaced by calcium and/ or strontium, and up to 66 mol-% of cerium isreplaced by zirconium and/or praseodymium, further combined with Pt-Pd or Pt-Pd-Rhprecious metal components. SCR catalysts are Cu/ zeolite modified by citrate treatmentor Cu-Ce, Mn-Ce or Co-Ce/modified zeolite. The invention also deals with a catalystsystem for an exhaust gas treatment system, in particular to be used as an exhaust gastreatment system for a combustion engine, comprising the LNT-catalyst according to thisinvention and the SCR-catalyst of the invention, wherein the SCR-catalyst is positioneddownstream of the LNT-catalyst.
申请人：Ford Global Technologies, LLC
地址：330 Town Center Drive, Suite 800 South Dearborn, MI 48126 US
国籍：US
代理机构：Drömer, Hans-Carsten
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