Umicore Ag & Co Kg

Barry Van Setten

Thomas Kreuzer

Egbert Lox

Paul Spurk

Jürgen Gieshoff

Marcus Pfeifer

Yvonne Demel

Liesbet Jongen

Tobias Kuhl

Roger Staab

Sebastian Dahm

Christian Haeske

Markus Pfeifer

Christian Romeis

Harald Krieg

Liesbel Jongen

Christian Häske

The present invention is directed to a special device for fast mixing and precipitation reactions of chemical substances. In particular, the present invention presents a reactor which allows an extremely fast mixing of at least two liquid streams containing highly concentrated dissolved materials from which solid metal compound particles are formed when at least two reactant streams meet, to which optionally a further stream, advantageously containing a dispersion or suspension, may be added.

In-line rotor-stator disperser and reaction process

The invention relates to a system and method for automating a system wherein an interpreter generates and executes an execution code based on instructions received in form of a tree sequence, and wherein the tree sequence comprises information of parallel operations to define the respective automation procedure. The definition of the tree sequence may be based on a standardized human and machine readable format, such as e.g. an XML document.

System and method for system automation based on interpreting a tree sequence of operations

The present invention relates to a method of removing nitrogen oxides from the exhaust gas of a lean-burn internal combustion engine by selective catalytic reduction (SCR) using ammonia. The exhaust gas is routed first over a platinum-containing pre-catalyst and then over an SCR catalyst. The ammonia needed for the selective catalytic reduction is added to the exhaust gas upstream of the pre-catalyst at an exhaust-gas temperature below 250&#xb0; C., while it is supplied to the exhaust gas between the pre-catalyst and the SCR catalyst at an exhaust gas temperature above 150&#xb0; C. By adopting this procedure, a very large temperature range for the selective catalytic reduction with high nitrogen conversion rates is obtained.

Method of removing nitrogen oxides from the exhaust gas of a lean-burn internal combustion engine and exhaust-gas purification system therefor

The present invention provides an exhaust gas treatment unit for an internal combustion engine. A first catalyst unit produces ammonia from corresponding constituents in a rich exhaust gas composition. A second catalyst unit that is located downstream of the first catalyst unit temporarily stores the ammonia produced by the first catalyst unit in the presence of a rich exhaust gas composition. In the presence of a lean exhaust gas composition, the nitrogen oxides present in the exhaust gas are subjected to a reduction reaction using the temporarily stored ammonia as reducing agent. The exhaust gas treatment unit also contains a third catalyst unit that is located between the other two catalyst units, and oxidizes the nitrogen oxides present in the exhaust gas at lean exhaust gas conditions to a such an extent that 25 to 75 vol. % of the nitrogen oxides entering the second catalyst unit consist of nitrogen dioxide.

Exhaust gas treatment units for internal combustion engines and processes for operating them

Growing community of inventors

Bad Soden-Salmuenster, Germany

Barry Van Setten