Provided is a catalytic article comprising (a) a flow through honeycomb substrate having channel walls; (b) a first NH3-SCR catalyst composition coated on and/or within the channel walls in a first zone; and (c) a second NH3-SCR catalyst composition coated on and/or within the channel walls in a second zone, provided that the first zone is upstream of the second zone and the first and second zones are adjacent or at least partially overlap; and wherein the first NH3-SCR catalyst comprises a first copper loaded molecular sieve having a copper to aluminum atomic ratio of about 0.1 to 0.375 and the second NH3-SCR catalyst comprises a second copper loaded molecular sieve having a copper-to-aluminum atomic ratio of about 0.3 to about 0.6.
申请公布号
EP3142773(A2)
申请公布日期
2017.03.22
申请号
EP20150727760
申请日期
2015.05.15
申请人
Johnson Matthey Public Limited Company
发明人
GAST, Jane;SONNTAG, Olivier;GENSCHOW, Tim;SMEDLER, Gudmund;WALKER, Andrew Peter;LARSSON, Mikael;MARKATOU, Penelope;ZHANG, Lingzhi