Provided is a catalyst which, when used in a selective catalytic reduction reaction in which ammonia serves as the reducing agent, further improves denitration efficiency at low temperatures compared to the prior art.

The denitration catalyst comprises vanadium oxide as a main component, and has a content of a second metal, in teams of oxide, of 1-40 wt %. The second metal is at least one type of metal element selected from the group consisting of Co, W, Mo, Nb, Ce, Sn, Ni, Fe, Cu, Zn, and Mn.

In order to specify a catalytic converter, especially SCR catalytic converter, with maximum catalytic activity, this catalytic converter has at least one catalytically active component and additionally at least one porous inorganic filler component having meso- or macroporosity. The organic porous filler component has a proportion of about 5 to 50% by weight. More particularly, a diatomaceous earth or a pillared clay material is used as the porous inorganic filler component.

The present invention relates to a method for the preparation of a molecular sieve of the CHA-type as well as catalytic applications thereof.

The invention relates to a catalyst device for purifying exhaust gases containing nitrogen oxide by using selective catalytic reduction (SCR), the catalyst device comprising at least two catalytic layers, the first layer containing vanadium oxide and a mixed oxide comprising titanium oxide and silicon oxide and the second layer containing a molecular sieve containing iron, wherein the first layer is applied onto the second layer. The invention also relates to uses of the catalyst device and a method for purifying exhaust gases.

The invention relates to a catalyst containing a BEA-type zeolite which contains iron as well as 0.05 to 1 percent by weight of sodium, the weight percentage being relative to the iron-exchanged zeolite and being calculated as metallic sodium.

A catalytic converter including a catalyst, the catalyst comprising a material of olivine composition, an engine comprising this catalytic converter and an method of producing nitrogen from NOx comprising the catalytic reduction of NOx by a catalyst comprising of a material of olivine composition. In addition, the use of a material of olivine composition in a catalytic reduction of NOx and a method of manufacture of a catalytic converter comprising adding the catalyst to a wash coat, applying the catalyst containing wash coat to a substrate and annealing the coated substrate.

A vehicular exhaust filter comprising a porous substrate having an inlet face and an outlet face with the porous substrate comprising inlet channels extending from the inlet face and outlet channels extending from the outlet face is disclosed. The inlet channels and the outlet channels are separated by a plurality of filter walls having a porous structure. The vehicular exhaust filter is loaded with a refractory powder having a tapped density before loading of less than 0.10 g/cm.sup.3 and the vehicular exhaust filter has a mass loading of the refractory powder of less than 10 g/l.

The present invention pertains to a catalyst for use in the selective catalytic reduction (SCR) of nitrogen oxides comprising: • a monolithic substrate and • a coating A which comprises an oxidic metal carrier comprising an oxide of titanium and a catalytic metal oxide which comprises an oxide of vanadium wherein the mass ratio vanadium/titanium is 0.07 to 0.26.

A catalyst for the selective catalytic reduction of NOx comprises a zeolitic material which comprises (A) one or more zeolites having a GME framework structure containing YO.sub.2 and X.sub.2O.sub.3, and optionally further comprises one or more zeolites having a CHA framework structure containing YO.sub.2 and X.sub.2O.sub.3, and/or comprises, (B) one or more zeolite intergrowth phases of one or more zeolites having a GME framework structure containing YO.sub.2 and X.sub.2O.sub.3 and one or more zeolites having a CHA framework structure containing YO.sub.2 and X.sub.2O.sub.3, wherein Y is a tetravalent element, and X is a trivalent element, and the zeolitic material contains Cu and/or Fe as non-framework elements in an amount ranging from 0.1 to 15 wt. % calculated as the element and based on 100 wt. % of YO contained in the zeolitic material. Also provided are a process for its preparation, and a use in a method for the selective catalytic reduction of NOx.

JMZ-1, a zeolite having a CHA structure and containing trimethyl(cyclohexylmethyl)ammonium cations as a structure directing agent is described. A calcined zeolite, JMZ-1C, that does not contain a structure directing agent, is also described. Metal containing JMZ-1C has improved SCR activity compared to CHA-containing zeolites having the same metal loading and comparable silica:alumina ratios (SAR). Methods of preparing JMZ-1, JMZ-1C and metal containing calcined counterparts of JMZ-1C are described along with methods of using JMZ-1C and metal containing calcined counterparts of JMZ-1C in treating exhaust gases.