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Michael Baacke, Reinhold Beand, Bernd Engler, Akos Kiss, Peter Kleine Mollhoff, Peter Kleinschmit, Edgar Koberstein, Mustafa Siray: Method for the reduction of nitrogen oxides from waste gases using a zeolite. Degussa Aktiengesellschaft, Beveridge DeGrandi & Weilacher, May 26, 1992: US05116586 (50 worldwide citation)

A zeolite catalyst and a method for reduction of nitrogen oxides present in waste gas streams is described. The method includes mixing the waste gas containing nitrogen oxides with ammonia. At an elevated temperature, this mixture is passed over a zeolite catalyst. Preferably, the zeolite catalyst i ...


2
Sanjay B Sharma, David S Shihabi: Method for the reduction of nitrogen oxides using iron impregnated zeolites. Mobil Oil Corporation, Ronald A Bleeker, Malcolm D Keen, Gerald L Harris, May 28, 1996: US05520895 (26 worldwide citation)

There is provided a process for the treatment of exhaust gas, which process uses a specially prepared catalyst composition, for the selective catalytic reduction of NO.sub.x contained in the exhaust gas. An embodiment of the process of this invention comprises a catalytic stage to selectively cataly ...


3
Thomas E Taylor: Apparatus and method for reduction of NOx emissions from a fluid bed combustion system through staged combustion. Foster Wheeler Energy Corporation, Marvin A Naigur, John E Wilson, John J Herguth Jr, January 5, 1982: US04308810 (15 worldwide citation)

Apparatus and method for the reduction of nitrogen oxides (NOx) in the emissions of a fuel burning fluidized bed combustion system. Using a staged combustion technique, an overfire air inlet is provided in the freeboard zone above the bed. In the first stage, residual oxygen (O.sub.2) in the off-gas ...


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Uwe Benz, Berthold Keppeler, André Martin, Peter Schuerstedt, Detlef zur Megede: System and method for reducing nitrogen oxides in the exhaust of an internal combustion engine. NuCellSys, Crowell & Moring, December 26, 2006: US07152394 (1 worldwide citation)

In a system and method for the reduction of nitrogen oxides in the exhaust of an internal combustion engine, the exhaust line of the internal combustion engine contains a DeNOx catalytic converter, in which the nitrogen oxides are reduced by means of hydrogen that is produced on-board the vehicle. T ...


6
Taylor Thomas E: Reduction of nox emission from fluidised bed combustion systems. Foster Wheeler Energy, April 27, 1983: GB2107206-A (1 worldwide citation)

Apparatus and method for the reduction of nitrogen oxides (NOx) in the emissions of a fuel burning fluidized bed combustion system. Using a staged combustion technique, an overfire air inlet is provided in the freeboard zone above the bed. In the first stage, residual oxygen (O2) in the off-gas just ...


7
Method for the reduction of nitrogen oxides in combustion effluents. Babcock Hitachi, Hitachi, November 30, 1977: GB1493226-A (1 worldwide citation)

1493226 Reducing nitrogen oxides HITACHI Ltd and BABCOCK-HITACHI KK 5 July 1976 [5 July 1975] 27854/76 Heading ClA Nitrogen oxides in an O 2 -containing combustion effluent are reduced by treating the effluent with at least one primary amine, secondary amine or an amide containing the group CONHR wh ...


8
Christoph Reith, Michael Seyler: SCR catalytic converter having improved NOx conversion. UMICORE & CO KG, Smith Gambrell & Russell, July 4, 2017: US09694320

The invention relates to the possibility of improving selective catalytic reduction (SCR), which is the selective reaction of nitrogen oxides with ammonia in the exhaust gas of combustion processes on an exhaust-gas catalytic converter suitable therefor—the SCR catalytic converter. For this purpose, ...


9
Jan Brückner, Thomas Hammer: Exhaust-gas purification device and method for the reduction of nitrogen oxides from an exhaust gas of a fossil-fired power plant. SIEMENS AKTIENGESELLSCHAFT, Schmeiser Olsen & Watts, July 12, 2016: US09387436

A catalytic exhaust gas purification device and method for the reduction of nitrogen oxides from an exhaust gas of a fossil-fired power plant, having a heating gas duct along a flow direction and having a reactor chamber which is arranged in the heating gas duct is provided. In the reactor chamber t ...


10
Stephan Malmberg, Nicola Soeger, Yvonne Demel, Gerald Jeske: SCR catalyst. UMICORE & CO KG, Smith Gambrell & Russell, July 17, 2018: US10022704

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 proportio ...