Siemens Aktiengesellschaft

Thomas Berthold

Hermann Boedinger

Christa Grabmaier

Gabriele Preu

A method for introducing at least one gaseous reducing agent for a nitrogen oxide into a gas mixture, and a device for carrying out the method. Thermal energy is supplied to a body made from a starting material of the reducing agent, so as to form the reducing agent. The starting material used is urea. The reducing agent formed is ammonia. This method is used in particular to reduce nitrogen oxides in the exhaust gas from internal-combustion engines.

Method and device for introducing a gaseous reducing agent of a nitrogen oxide into a gas mixture

The invention proposes that a casting mold be provided with a lining for the manufacture of a crystal body. The lining is removed from the casting mold together with the crystal body that has solidified in the lining and the lining serves as a protective cap for the crystal body. Additional functional layers for the protective cap or the scintillator plate can be integrated into the lining.

Method of manufacturing large crystal bodies

A multi-shelled melt container is disclosed for liquefying and crystallizing substances which comprises at least an inner shell and a bearing shell. While the inner shell--which has a thin wall in comparison to the wall of the bearing shell--consists of an inert material with respect to the melt, the bearing shell serves exclusively to fixate and support the inner shell and is correspondingly constructed in a mechanically stable fashion. The device can also comprise means to pump the melt over into a collection vessel.

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Munich, Germany

Thomas Berthold