1
Meinhard Schwefer, Michael Groves, Rolf Siefert, Rainer Maurer: O of gases, and N, Method and device for reducing the NO. Unde, Connolly Bove Lodge & Hutz, December 9, 2008: US07462340 (6 worldwide citation)

The disclosure involves a method for reducing the content of NOx and N2O in gases. The method includes the conduction of a gas containing N2O and NOX over a series of two catalyst beds containing of one or more zeolites charged with iron followed by the: addition of a reduction agent for NOX between ...


2
Meinhard Schwefer, Rolf Siefert, Michael Groves: Method for reducing the nitrogen oxide concentration in gases. Uhde, Connolly Bove Lodge & Hutz, June 29, 2010: US07744839 (1 worldwide citation)

The method comprises passing an N2O- and NOx-containing gas over a sequence of two catalyst beds, adding reducing agents for NOx and for N2O between the catalyst beds in such an amount that not only NOx but also a predetermined proportion of N2O is reduced. The reaction conditions are set so that th ...


3
Meinhard Schwefer, Michael Groves, Jürgen Fuchs, Rainer Maurer, Rolf Siefert, Bernhard Hündgen: Device and method for catalytic gas phase reaction and the use thereof. UHDE, Michael W Ferrell, Ferrells PLLC, Anna L Kinney, August 18, 2015: US09108175 (1 worldwide citation)

Improved reactors for catalytic, exothermic gas-phase reactions having, viewed in the flow direction of a feed gas, an inlet zone (1), a reaction zone (2) containing at least one catalyst (4), and an outlet zone (3) for the product gas, are described. The reactors are provided in the inlet zone (1) ...


4
Meinhard Schwefer, Michael Groves, Christian Perbandt, Rolf Siefert: Process and apparatus for eliminating NOX and N2O. thyssenkrupp Industrial Solutions, Michael W Ferrell, Ferrells PLLC, Anna L Kinney, July 17, 2018: US10022669

A process for removing N2O and NOx from offgases by catalytic decomposition of N2O by means of iron-containing zeolite catalysts and catalytic reduction of the NOx by means of reducing agents, the deNOx stage connected downstream of the deN2O stage being operated at inlet temperatures of T<=400° C., ...


5
Meinhard Schwefer, Rolf Siefert, Jürgen Fuchs, Klaus Ruthardt, Michael Groves: from the nitric acid production process, and an installation suitable for same, O and NO, Method for removing N. THYSSENKRUPP UHDE, Michael W Ferrell, Ferrells PLLC, Anna L Kinney, August 22, 2017: US09738521

The invention relates to a process and apparatus for preparing nitric acid by catalytic oxidation of NH3 by means of oxygen and subsequent reaction of the NOx formed with an absorption medium in an absorption tower, which comprises a catalyst bed for N2O decomposition arranged in the process gas dow ...


6
Meinhard Schwefer, Rolf Siefert, Frank Seifert, Frank Froehlich, Wolfgang Burckhardt: O, Catalyst production method therefor and use thereof for decomposing N. UHDE, Michael W Ferrell, Ferrells PLLC, October 28, 2014: US08871673

Catalysts for the decomposition of N2O into nitrogen and oxygen in the gas phase, which comprises a porous support composed of polycrystalline or vitreous inorganic material, a cerium oxide functional layer applied thereto and a layer of oxidic cobalt-containing material applied thereto are describe ...


7
Meinhard Schwefer, Rolf Siefert, Stefan Pinnow: O, and N, Device and method for eliminating NO. ThyssenKrupp Industrial Solutions, ThyssenKrupp North America, January 19, 2016: US09238196

Disclosed herein is a device and method for lowering the content of NOX and N2O in gases. The device comprises a container having therein two reaction steps connected in series. The first step removes NOX (DeNOX stage) by reducing NOX with a nitrogen-containing reducing agent. Downstream thereof, th ...


8
Meinhard Schwefer, Michael Groves, Jürgen Fuchs, Rainer Maurer, Rolf Siefert, Bernhard Hündgen: Device and process for catalytic gas phase reactions and use thereof. UHDE, Michael W Ferrell, Ferrells PLLC, Anna L Kinney, February 23, 2016: US09266081

Improved reactors for catalytic, exothermic gas phase reactions with, as seen in the flow direction of a feed gas, which contains at least one oxidant and at least one component to be oxidized, an entry zone (1), a reaction zone (2) comprising at least one catalyst (4) and an exit zone (3) for the p ...


9
Meinhard Schwefer, Joachim Motz, Rolf Siefert: Method for reducing the content of n2o and nox in gases. Connolly Bove Lodge & Hutz, June 10, 2004: US20040109805-A1

A method of reducing the content of NOx and N2O in gases using a gaseous reducing agent which is used in the amount required for reduction of the NOx in the presence of one or more iron-laden zeolites which have no pores or channels having a width of greater than or equal to 7 ngstrm in the crystal ...


10
Meinhard Schwefer, Joachim Motz, Rolf Siefert: Method for Reducing the Content of N2O and NOx in Gases. Uhde, Connolly Bove Lodge & Hutz, February 21, 2008: US20080044331-A1

A method of reducing the content of NOx and N2O in gases using a gaseous reducing agent which is used in the amount required for reduction of the NOx in the presence of one or more iron-laden zeolites which have no pores or channels having a width of greater than or equal to 7 Ångström in the crysta ...