Patents by Inventor Yvonne Demel
Yvonne Demel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11298692Abstract: The invention relates to a catalyst containing a BEA-type zeolite which contains iron as well as 0.05 to 1 percent by weight of sodium, the weight percentage being relative to the iron-exchanged zeolite and being calculated as metallic sodium.Type: GrantFiled: September 21, 2018Date of Patent: April 12, 2022Assignee: Umicore AG & Co. KGInventors: Fei Wen, Nicola Soeger, Yvonne Demel
-
Publication number: 20210362139Abstract: The invention relates to a catalyst containing a BEA-type zeolite which contains iron as well as 0.05 to 1 percent by weight of sodium, the weight percentage being relative to the iron-exchanged zeolite and being calculated as metallic sodium.Type: ApplicationFiled: September 21, 2018Publication date: November 25, 2021Inventors: Fei Wen, Nicola Soeger, Yvonne Demel
-
Patent number: 10022704Abstract: The invention relates to a catalyst comprising at least two catalytically active layers, A and B, wherein A contains a carrier oxide and components A1 and A2, and B contains a carrier oxide and components B1, B2, and B3, wherein A1, A2, and B1 to B3 are defined as disclosed in claim 1. The proportion of component A1 in layer A is thereby greater than the proportion of component B1 in layer B, wherein the proportion of layer A with respect to the total weight of layers A and B, is greater than the proportion of layer B. The invention further relates to a method for reducing nitrogen oxides in exhaust gases of lean-burn internal combustion engines and to an exhaust gas cleaning system.Type: GrantFiled: November 19, 2014Date of Patent: July 17, 2018Assignee: UMICORE AG & CO. KGInventors: Stephan Malmberg, Nicola Soeger, Yvonne Demel, Gerald Jeske
-
Publication number: 20160288094Abstract: The invention relates to a catalyst comprising at least two catalytically active layers, A and B, wherein A contains a carrier oxide and components A1 and A2, and B contains a carrier oxide and components B1, B2, and B3, wherein A1, A2, and B1 to B3 are defined as disclosed in claim 1. The proportion of component A1 in layer A is thereby greater than the proportion of component B1 in layer B, wherein the proportion of layer A with respect to the total weight of layers A and B, is greater than the proportion of layer B. The invention further relates to a method for reducing nitrogen oxides in exhaust gases of lean-burn internal combustion engines and to an exhaust gas cleaning system.Type: ApplicationFiled: November 19, 2014Publication date: October 6, 2016Applicant: UMICORE AG & CO. KGInventors: Stephan MALMBERG, Nicola SOEGER, Yvonne DEMEL, Gerald JESKE
-
Patent number: 9346026Abstract: The present invention is directed to an apparatus for mixing gaseous mixture components. The present invention likewise relates to a correspondingly applied method and to the use of an apparatus according to the invention for mixing components of the exhaust gas of internal combustion engines with a reducing agent and to a correspondingly designed reactor.Type: GrantFiled: April 16, 2013Date of Patent: May 24, 2016Assignee: UMICORE AG & CO. KGInventors: Yvonne Demel, Roland Kramarek, Anke Schuler
-
Publication number: 20130286770Abstract: The present invention is directed to an apparatus for mixing gaseous mixture components. The present invention likewise relates to a correspondingly applied method and to the use of an apparatus according to the invention for mixing components of the exhaust gas of internal combustion engines with a reducing agent and to a correspondingly designed reactor.Type: ApplicationFiled: April 16, 2013Publication date: October 31, 2013Applicant: UMICORE AG & CO. KGInventors: Yvonne DEMEL, Roland KRAMAREK, Anke SCHULER
-
Patent number: 7977275Abstract: The invention proposes a particulate filter having a catalytic coating which contains two catalysts arranged one behind the other. The first catalyst is located in the gas inlet region of the filter and contains a palladium/platinum catalyst. The second catalyst is arranged downstream of the first catalyst and preferably contains platinum alone as catalytically active component. The combination of these two catalysts provides the coated filter with a good ageing stability and resistance to sulphur poisoning.Type: GrantFiled: August 13, 2005Date of Patent: July 12, 2011Assignee: Umicore AG & Co. KGInventors: Marcus Pfeifer, Markus Koegel, Roger Staab, Pascal Adolph, Yvonne Demel, Tobias Kuhl, Egbert Lox, Thomas Kreuzer, Frank-Walter Schuetze
-
Patent number: 7799298Abstract: The invention relates to a catalyst arrangement for purifying the exhaust gases of internal combustion engines operated under lean conditions. It is proposed that a thinwalled, porous carrier be coated on one side with a nitrogen oxide storage catalyst and on the other side with an SCR catalyst. When the exhaust gas is passed through the catalytic coatings and the support material, a significant improvement in the nitrogen oxide conversion is achieved compared to a series arrangement of the catalysts on separate carriers. Wall flow filters have been found to be useful as thin-walled carriers.Type: GrantFiled: July 29, 2004Date of Patent: September 21, 2010Assignee: Umicore AG & Co. KGInventors: Marcus Pfeifer, Nicola Soeger, Yvonne Demel, Tobias Kuhl, Paul Christian Spurk, Jürgen Gieshoff, Egbert Lox, Thomas Kreuzer
-
Publication number: 20100166628Abstract: In exhaust gas purification units for decreasing nitrogen oxides in lean-burn exhaust gas of internal combustion engines by selective catalytic reduction by means of ammonia, introduction of excess ammonia leads to undesirable emissions of unused ammonia. These emissions can be decreased by means of ammonia barrier catalysts. In the ideal case, ammonia is oxidized to nitrogen and water by these catalysts. These require additional space in the exhaust gas purification unit which may have to be taken away from the space provided for the SCR main catalyst. In addition, the use of such ammonia barrier catalysts can result in overoxidation of the ammonia to nitrogen oxides. To overcome these disadvantages, a catalyst containing two superposed layers is proposed for the removal of nitrogen-containing pollutant gases from diesel exhaust gas. The lower layer contains an oxidation catalyst and the upper layer can store at least 20 milliliters of ammonia per gram of catalyst material.Type: ApplicationFiled: February 15, 2007Publication date: July 1, 2010Inventors: Nicola Soeger, Wolfgang Schneider, Yvonne Demel, Lothar Mussmann, Ralf Sesselmann, Thomas Kreuzer
-
Publication number: 20090137386Abstract: The invention proposes a particulate filter having a catalytic coating which contains two catalysts arranged one behind the other. The first catalyst is located in the gas inlet region of the filter and contains a palladium/platinum catalyst. The second catalyst is arranged downstream of the first catalyst and preferably contains platinum alone as catalytically active component. The combination of these two catalysts provides the coated filter with a good ageing stability and resistance to sulphur poisoning.Type: ApplicationFiled: August 13, 2005Publication date: May 28, 2009Applicant: UMICORE AG & CO. KGInventors: Marcus Pfeifer, Markus Koegel, Roger Staab, Pascal Adolph, Yvonne Demel, Tobias Kuhl, Egbert Lox, Thomas Kreuzer, Frank-Walter Schuetze
-
Patent number: 7431895Abstract: An exhaust gas treatment unit for the selective catalytic reduction of nitrogen oxides under lean exhaust gas conditions which contains at least one catalyst with catalytically active components for selective catalytic reduction (SCR components). The exhaust gas treatment unit is characterised in that the catalyst also contains, in addition to SCR components, at least one storage component for nitrogen oxides (NOx components).Type: GrantFiled: November 6, 2001Date of Patent: October 7, 2008Assignee: Umicore AG & Co. KGInventors: Marcus Pfeifer, Paul Spurk, Jürgen Gieshoff, Yvonne Demel, Egbert Lox, Thomas Kreuzer
-
Patent number: 7313911Abstract: 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° C., while it is supplied to the exhaust gas between the pre-catalyst and the SCR catalyst at an exhaust gas temperature above 150° C. By adopting this procedure, a very large temperature range for the selective catalytic reduction with high nitrogen conversion rates is obtained.Type: GrantFiled: February 26, 2004Date of Patent: January 1, 2008Assignee: Umicore AG & Co. KGInventors: Markus Pfeifer, Barry Van Setten, Paul Spurk, Yvonne Demel, Tobias Kuhl, Jürgen Gieshoff, Egbert Lox, Thomas Kreuzer
-
Publication number: 20070110650Abstract: The invention relates to a catalyst arrangement for purifying the exhaust gases of internal combustion engines operated under lean conditions. It is proposed that a thinwalled, porous carrier be coated on one side with a nitrogen oxide storage catalyst and on the other side with an SCR catalyst. When the exhaust gas is passed through the catalytic coatings and the support material, a significant improvement in the nitrogen oxide conversion is achieved compared to a series arrangement of the catalysts on separate carriers. Wall flow filters have been found to be useful as thin-walled carriers.Type: ApplicationFiled: July 29, 2004Publication date: May 17, 2007Applicant: Umicore AG & CO. KGInventors: Marcus Pfeifer, Nicola Soeger, Yvonne Demel, Tobias Kuhl, Paul Spurk, Jurgen Gieshoff, Egbert Lox, Thomas Kreuzer
-
Publication number: 20070051096Abstract: 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° C., while it is supplied to the exhaust gas between the pre-catalyst and the SCR catalyst at an exhaust gas temperature above 150° C. By adopting this procedure, a very large temperature range for the selective catalytic reduction with high nitrogen conversion rates is obtained.Type: ApplicationFiled: February 26, 2004Publication date: March 8, 2007Applicant: UMICORE AG CO. KGInventors: Markus Pfeifer, Barry Van Setten, Paul Spurk, Yvonne Demel, Tobias Kuhl, Jurgen Gieshoff, Egbert Lox, Thomas Kreuzer
-
Patent number: 7005116Abstract: A process for reducing the nitrogen oxides present in a lean exhaust gas from an internal combustion engine by selective catalytic reduction on a reduction catalyst using ammonia, wherein a fraction of the nitrogen monoxide present in the exhaust gas is oxidized to nitrogen dioxide before the exhaust gas, together with ammonia, is passed over the reduction catalyst. The reduction catalyst contains a zeolite exchanged with transition metals and oxidation of the nitrogen monoxide is performed in such a way that the exhaust gas contains 30 to 70 vol. % of nitrogen dioxide before contact with the reduction catalyst.Type: GrantFiled: January 18, 2005Date of Patent: February 28, 2006Assignee: Umicore AG & Co. KGInventors: Adolf Schäfer-Sindlinger, Marcus Pfeifer, Paul Spurk, Yvonne Demel, Thomas Kreuzer, Egbert Lox
-
Publication number: 20050196333Abstract: A process for reducing the nitrogen oxides present in a lean exhaust gas from an internal combustion engine by selective catalytic reduction on a reduction catalyst using ammonia, wherein a fraction of the nitrogen monoxide present in the exhaust gas is oxidized to nitrogen dioxide before the exhaust gas, together with ammonia, is passed over the reduction catalyst. The reduction catalyst contains a zeolite exchanged with transition metals and oxidation of the nitrogen monoxide is performed in such a way that the exhaust gas contains 30 to 70 vol. % of nitrogen dioxide before contact with the reduction catalyst.Type: ApplicationFiled: January 18, 2005Publication date: September 8, 2005Applicant: Umicore AG & Co., KGInventors: Adolf Schafer-Sindlinger, Marcus Pfeifer, Paul Spurk, Yvonne Demel, Thomas Kreuzer, Egbert Lox
-
Patent number: 6843971Abstract: A process for reducing the nitrogen oxides present in a lean exhaust gas from an internal combustion engine by selective catalytic reduction on a reduction catalyst using ammonia, wherein a fraction of the nitrogen monoxide present in the exhaust gas is oxidized to nitrogen dioxide before the exhaust gas, together with ammonia, is passed over the reduction catalyst. The reduction catalyst contains a zeolite exchanged with transition metals and oxidation of the nitrogen monoxide is performed in such a way that the exhaust gas contains 30 to 70 vol. % of nitrogen dioxide before contact with the reduction catalyst.Type: GrantFiled: April 20, 2001Date of Patent: January 18, 2005Assignee: UMICORE AG & Co. KGInventors: Adolf Schäfer-Sindlinger, Marcus Pfeifer, Paul Spurk, Yvonne Demel, Thomas Kreuzer, Egbert Lox
-
Publication number: 20040209769Abstract: The invention provides a redox catalyst for the selective reduction of the nitrogen oxides present in exhaust gas from diesel engines using ammonia. The reduction catalyst contains a catalytically active material which is based on the solid acid system TiO2/WO3/MoO3V2O5/SiO2/SO3 and an oxidation catalyst based on the platinum group metals platinum and palladium. The reduction catalyst is present in the form of a cylindrical honeycomb catalyst with an inlet and an outlet end face. The oxidation catalyst is applied to a section of the reduction catalyst adjacent to the outlet end face. The redox catalyst is characterised in that the catalytically active material in the reduction catalyst is used as support material for the platinum group metals in the oxidation catalyst.Type: ApplicationFiled: June 14, 2004Publication date: October 21, 2004Inventors: Yvonne Demel, Thomas Kreuzer, Egbert Lox, Adolf Schafer-Sindlinger, Paul Spurk, Hans Van Den Tillaart
-
Patent number: 6713031Abstract: A structured catalyst for selective reduction of nitrogen oxides with ammonia using an ammonia-supplying compound. The catalyst is preferably used for exhaust gas treatment of diesel vehicles powered by diesel motors. The catalyst is characterized by the fact that it contains a reduction catalyst for selective reduction of nitrogen oxides with ammonia and a hydrolysis catalyst for the hydrolysis of urea, where the hydrolysis catalyst is applied in the form of a coating onto the reduction catalyst. By this arrangement of the two catalytic functions in one catalyst the exhaust gas system can be made very compactly and space saving. Moreover, advantageous synergistic effects result from the direct contact of the hydrolysis catalyst and the reduction catalyst.Type: GrantFiled: May 9, 2001Date of Patent: March 30, 2004Assignee: DMC2 Degussa Metal Catalysts Cerdec AGInventors: Michael Harris, Jürgen Leyrer, Yvonne Demel, Egbert Lox, Thomas Kreuzer
-
Publication number: 20020054844Abstract: An exhaust gas treatment unit for the selective catalytic reduction of nitrogen oxides under lean exhaust gas conditions which contains at least one catalyst with catalytically active components for selective catalytic reduction (SCR components). The exhaust gas treatment unit is characterised in that the catalyst also contains, in addition to SCR components, at least one storage component for nitrogen oxides (NOx components).Type: ApplicationFiled: November 6, 2001Publication date: May 9, 2002Inventors: Marcus Pfeifer, Paul Spurk, Jurgen Gieshoff, Yvonne Demel, Egbert Lox, Thomas Kreuzer