Degussa Aktiengesellschaft

Degussa - Huls Ag

Klaus Ostgathe

Egbert Lox

Rainer Domesle

Edgar Koberstein

Bernd Engler

Thomas Kreuzer

J&uuml;rgen Leyrer

Juergen Leyrer

Wilfried M&uuml;ller

A catalyst system for the treatment of exhaust gases from a diesel engine includes a first and a second catalyst reducing catalyst arranged in series in an exhaust gas treatment system. The first catalyst is located near the engine in a region of the exhaust gas treatment system in which the exhaust gas temperature reaches temperatures of more than 200&deg; C. under full engine load. The second catalyst is located further from the engine in a region of the exhaust gas treatment system in which the exhaust gas temperature reaches a maximum of 500&deg; C. under full engine load. The maximum nitrogen oxides reduction in the first catalyst takes place at a lower temperature than the maximum nitrogen oxides reduction in the second catalyst.

Catalyst system for the treatment of exhaust gases from diesel engines

A coating dispersion is shown for the production of catalysis-promoting coatings on an inert, structure-reinforcing element. The solids of the dispersion are present in various particle fractions and lead to a relatively rough coating surface with improved exchange between the exhaust gas and the catalyst surface. This results in improved heat-up behavior of the catalyst.

Coating dispersion for exhaust gas catalysts

A process for simultaneously reducing the amounts of hydrocarbons, carbon monoxide and nitrogen oxides contained in the exhaust gas from an internal combustion engine in the exhaust gas from gasoline or diesel engines with high amounts of oxygen in the exhaust gas is disclosed. A high reductive effect towards nitrogen oxides is enabled by using a homogeneous aluminum silicate as a high surface area support material for the catalytically active components.

Process for simultaneously reducing the amounts of hydrocarbons, carbon

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Hattersheim, Germany

Klaus Ostgathe