Basf Corporation

Basf Se Corporation

Ruediger Wolff

Stanley Allen Roth

Yuejin Li

Torsten Neubauer

Gerd Grubert

Alfred Helmut Punke

Torsten W Müller-Stach

Kenneth Edwin Voss

Marcus Hilgendorff

Attilio Siani

Edgar Viktor Huennekes

Jan Martin Becker

Kevin David Beard

Petra Cordes

Torsten Müller-Stach

Alfred Punke

An SCR catalyst for treating diesel exhaust gas has: a flow-through substrate with an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end and a plurality of passages defined by internal walls of the flow through substrate extending therethrough; a first coating disposed on the internal wall surface of the substrate, the surface defining the interface between the internal walls and passages, the first coating extending over 40 to 100% of the substrate axial length, the first coating having an 8-membered ring pore zeolitic material with copper and/or iron; a second coating extending over 20 to 100% of the substrate axial length, the second coating having a first oxidic material with titania, wherein at least 75 wt. % of the second coating is titania, calculated as TiO, and 0 to 0.01 wt. % of the second coating is vanadium oxides, calculated as VO.

SCR catalyst for the treatment of an exhaust gas of a diesel engine

Described is a catalyzed soot filter wherein the inlet coating of the filter comprises an oxidation catalyst comprising platinum (Pt) and optionally palladium (Pd), wherein the outlet coating of the filter comprises an oxidation catalyst comprising Pd and optionally Pt, wherein the Pt concentration in the outlet coating is lower than the Pt concentration in the inlet coating and wherein the weight ratio of Pt:Pd in the outlet coating is in the range of from 0:1 to 2:1; and wherein the inlet coating and the outlet coating are present on the wall flow substrate at a coating loading ratio in the range of from 0.5 to 1.5, calculated as ratio of the loading of the inlet coating (in g/inch(g/(2.54 cm))):loading of the outlet coating (in g/inch(g/(2.54 cm))). Systems include such catalyzed soot filters, methods of diesel engine exhaust gas treatment and methods of manufacturing catalyzed soot filters are also described.

Catalyzed soot filter

Disclosed is a catalyzed soot filter with layered design wherein the first coating of the filter comprises an oxidation catalyst comprising platinum (Pt) and optionally palladium (Pd), wherein the second coating of the filter comprises an oxidation catalyst comprising Pd and optionally Pt, wherein the Pt concentration in the second coating is lower than the Pt concentration in the first coating, and wherein the weight ratio of Pt:Pd in the second coating is in the range of from 1:1 to 0:1; and wherein the first coating and the second coating are present on the wall flow substrate at a coating loading ratio in the range of from 0.25 to 3, calculated as ratio of the loading of the first coating (in g/inch(g/(2.54 cm))): loading of the second coating (in g/inch(g/(2.54 cm))).

Catalyzed soot filter with layered design

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Nienburg, Germany

Ruediger Wolff