LNT AND SCR CATALYSTS FOR COMBINED LNT-SCR APPLICATIONS
The current invention refers to the LNT and the SCR catalysts designed for combined 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-% of lanthanum is replaced by calcium and/ or strontiu...
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Main Authors | , , , |
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Format | Patent |
Language | English |
Published |
23.08.2012
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Subjects | |
Online Access | Get full text |
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Summary: | The current invention refers to the LNT and the SCR catalysts designed for combined 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-% of lanthanum is replaced by calcium and/ or strontium, and up to 66 mol-% of cerium is replaced by zirconium and/or praseodymium, further combined with Pt-Pd or Pt-Pd-Rh precious metal components. SCR catalysts are Cu/zeolite modified by citrate treatment or Cu-Ce, Mn-Ce or Co-Ce/modified zeolite. |
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Bibliography: | Application Number: US201213358708 |