Process for the Removal of Harmful Substances from Exhaust Gases of Combustion Engines and Catalyst for Carrying Out Said Process
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United States of America Patent
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app pub date -
Dec 1, 2011
filing date -
Apr 16, 2004
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Abstract
An integrated system for treatment of exhaust gases includes a NOx-storing component, an in situ ammonia-generating component, an ammonia-storing component, and an ammonia (NH3)—SCR-component. A process for treatment of exhaust gas includes (i) storing of NOx under lean exhaust gas conditions in a NOx-storing component; (ii) in situ conversion of the stored NOx to ammonia (NH3) under rich exhaust gas conditions; (iii) storing of the ammonia (NH3) in a NH3-storing component under rich exhaust gas conditions, and (iv) reaction of NH3 with NOx under lean exhaust gas conditions. Thereby, the partial steps of storing of NOx and conversion of NH3 with NOx are carried out at least partially and/or temporarily simultaneously and/or parallelly.
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