公开(公告)号：EP3157672A4

公开(公告)日：2018-04-04

申请号：EP15809019

申请日：2015-06-17

Applicant: BASF CORP

Inventor： TRUKHAN NATALIA ,  MUELLER ULRICH ,  BREEN MICHAEL ,  SLAWSKI BARBARA ,  FU QI ,  MOHANAN JAYA L ,  KRAUS MARTIN W ,  MOINI AHMAD ,  YANG XIAOFAN ,  HOCHMUTH JOHN K

IPC: B01J29/06 ,  B01J29/064 ,  F01N3/20

CPC classification number: B01J37/0215 ,  B01D53/9418 ,  B01D53/9436 ,  B01D2251/2062 ,  B01D2251/2067 ,  B01D2255/104 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/20707 ,  B01D2255/20715 ,  B01D2255/20723 ,  B01D2255/2073 ,  B01D2255/20738 ,  B01D2255/20746 ,  B01D2255/20753 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/911 ,  B01J29/763 ,  B01J29/89 ,  B01J35/0006 ,  B01J35/002 ,  B01J35/023 ,  B01J35/04 ,  B01J37/0246 ,  B01J2229/183 ,  B01J2229/186

Abstract: Described is a selective catalytic reduction catalyst comprising a zeolitic framework material of silicon and aluminum atoms, wherein a fraction of the silicon atoms are isomorphously substituted with a tetravalent metal. The catalyst can include a promoter metal such that the catalyst effectively promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H20 selectively over a temperature range of 150 to 650 °C. In another aspect, described is a selective catalytic reduction composite comprising an SCR catalyst material and an ammonia storage material comprising a transition metal having an oxidation state of IV. The SCR catalyst material promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H20 selectively over a temperature range of 150 °C to 600 °C, and the SCR catalyst material is effective to store ammonia at temperatures of 400 °C and above. A method for selectively reducing nitrogen oxides, and a method for simultaneously selectively reducing nitrogen oxide and storing ammonia are also described. Additionally, an exhaust gas treatment system is also described.