Composition based on a ferrierite and its use in a gas treatment method for reducing nitrogen oxide emissions

The invention concerns catalytic compositions comprising a zeolite and methods for reducing nitrogen oxides (NOx) using said catalytic compositions. The inventive catalytic compositions comprise a ferrierite type zeolite (FER), which has been subjected to an ion-exchange with a rare earth selected among cerium, praseodymium, samarium, terbium,...

Zeolite catalysts and their use in selective catalytic reduction of NOx

The invention is directed to catalyst compositions comprising a zeolite, as well as to processes for the reduction of nitrogen oxides (NOx) employing these catalyst compositions. The catalyst compositions of the invention comprise a zeolite of the ferrierite type (FER), which zeolite is ion exchanged with Ce, in particular Ce-H-FER and are very...

Structured reactor packing and method of manufacturing same

The invention comprises a method of manufacturing a catalyst element consisting of parallel rods of catalyst-containing material, which material has been provided around a rod-shaped support through pressing in a die. The invention further relates to structured catalyst packings consisting of elements manufactured according to this method....

Process for treating nitrogen oxide-containing gas using a cerium zeolite

The invention relates to a process for treating nitrogen oxide-containing gas substantially having a temperature in the range of 300-560 DEG C, for instance exhaust gases of gas engines or off-gases of power plants, in which the gas is passed over a cerium-containing zeolite catalyst in the presence of substantially an excess of a NH-containing...

Process and apparatus for burning solid fuel

Abstract of NL 9301828 (A) Described is a process for burning solid fuel, in which nitrogen in the form of NH3 is released from said fuel, for example by gasification, said NH3 being excluded from the combustion process but being admixed, together with CO likewise released, to the gases released in the combustion process proper. This ensures, by...

Catalyst system of the structured type

The invention relates to a catalyst system of the structured type, in which a structured support is covered with a layer of molecular sieve crystals and/or modifications thereof. These crystals have substantially the same orientation relative to the support surface. The invention further relates to a reactor in which this catalyst system is...