Patents by Inventor Jens Kehlet
Jens Kehlet 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).
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Publication number: 20240150918Abstract: The invention regards a method for electrochemical ammonia synthesis, comprising the steps of: —providing an electrolysis cell having a cathode, —contracting the cathode with a source of cations preferably lithium cations, a source of nitrogen a source of oxygen, and a source of protons, wherein the oxygen source provides a predefined oxygen concentration, and —subjecting the cell to a potential and current load, whereby ammonia is synthesized.Type: ApplicationFiled: February 22, 2022Publication date: May 9, 2024Inventors: Suzanne Zamany Andersen, Katja Li, Vanessa Jane Bukas, Mattia Saccoccio, Kevin Krempl, Jakob Kibsgaard, Peter Christian Kjærgaard Vesborg, Debashish Chakraborty, Jens Kehlet Nørskov, Ib Chorkendorff, Michael Statt, Jakob Bruun Pedersen, Rokas Sazinas
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Publication number: 20230086549Abstract: The invention regards a method for electrochemical ammonia synthesis, comprising the steps of: providing at least one electrolysis cell; contacting the cathode with a source of lithium cations, nitrogen, and protons; and subjecting the cathode to a continuous pulsed cathode potential, including a pulsed cathodic current load, wherein the cathode potential is pulsed between the lithium reduction potential and a less negative cathode potential, whereby ammonia is synthesized.Type: ApplicationFiled: March 5, 2021Publication date: March 23, 2023Inventors: Suzanne Zamany Andersen, Ib Chorkendorff, Debashish Chakraborty, Peter christian Kjærgaard Vesborg, Jakob Kibsgaard, Jens Kehlet Nørskov, Vanessa Jane Bukas
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Patent number: 9889403Abstract: Disclosed is a method for the selective catalytic reduction of NOx in waste/exhaust gas by using ammonia provides by heating one or more salts of formula Ma(NH3)nXz, wherein M represents one or more cations selected from alkaline earth metals and transition metals, X represents one or more anions, a represents the number of cations per salt molecule, z represents the number of anions per salt molecule, and n is a number of from 2 to 12, the one or more salts having been compressed to a bulk density above 70% of the skeleton density before use thereof.Type: GrantFiled: February 26, 2013Date of Patent: February 13, 2018Assignee: AMMINEX EMISSIONS TECHNOLOGY A/SInventors: Claus Hviid Christensen, Tue Johannessen, Ulrich Quaade, Jens Kehlet Nørskov, Rasmus Zink Sørensen
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Patent number: 8578702Abstract: A method of storing and delivering ammonia and the use of electromagnetic radiation for desorption of ammonia from a chemical complex. Solid metal ammine complexes are applied for safe and high-density storage of ammonia to be released for use as reducing agent in selective catalytic reduction of NOx in exhaust gases. The compositional formula of the metal ammine complexes is M(NH3)nXz, where M2+ represents one or more metal ions capable of binding ammonia, X represents one or more anions, n is the coordination number (from 2 to 12), and z the valency of the metal ion (and thus the total number of compensating anion charges). Ammonia is released non-thermally by photon-activation using electromagnetic irradiation of the complex bond between ammonia coordinated to the metal ion.Type: GrantFiled: February 27, 2007Date of Patent: November 12, 2013Assignee: Amminex Emissions Technology A/SInventors: Tue Johannessen, Rasmus Zink Sørensen, Claus Hviid Christensen, Ulrich Quaade, Jens Kehlet Nørskov, Henning Schmidt
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Publication number: 20130230443Abstract: Disclosed is a method for the selective catalytic reduction of NOx in waste/exhaust gas by using ammonia provides by heating one or more salts of formula Ma(NH3)nXz, wherein M represents one or more cations selected from alkaline earth metals and transition metals, X represents one or more anions, a represents the number of cations per salt molecule, z represents the number of anions per salt molecule, and n is a number of from 2 to 12, the one or more salts having been compressed to a bulk density above 70% of the skeleton density before use thereof.Type: ApplicationFiled: February 26, 2013Publication date: September 5, 2013Inventors: Claus Hviid Christensen, Tue Johannessen, Ulrich Quaade, Jens Kehlet Norskøv, Rasmus Zink Sørensen
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Patent number: 7964163Abstract: A solid ammonia storage and delivery material comprising an ammonia absorbing/desorbing solid material, said storage and delivery material having been compacted to a density above 50% of the theoretic skeleton density provides a solid ammonia storage material which is easy to produce and handle and has a very high density of stored ammonia which is readily released under controlled conditions even though the porosity of the material is very low, and which storage material is safe for storage and transport of ammonia without special safety measures.Type: GrantFiled: October 13, 2009Date of Patent: June 21, 2011Assignee: Amminex A/SInventors: Tue Johannessen, Christensen Claus Hviid, Norskov Jens Kehlet, Sorensen Rasmus Zink, Quaade Ulrich
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Publication number: 20110060174Abstract: Provided is a catalyst including a mixture of metal A selected from Fe, Co and Ni, and metal B selected from Zn and Ga, and a support material, where the two metals are present in an intermetallic composition; A method for the manufacture of the catalyst; and the use of the catalyst for the selective hydrogenation of acetylene to ethylene in a gas mixture including acetylenic impurities and hydrogen, and one or more of ethylene and carbon monoxide. The catalyst has a high selectivity and is based an easily available metal compounds.Type: ApplicationFiled: January 7, 2009Publication date: March 10, 2011Applicant: DANMARKS TEKNISKE UNIVERSITET - DTUInventors: Felix Studt, Jens Kehlet Nørskov, Claus Hviid Christensen, Rasmus Zink Sørensen, Frank Abild-Pedersen, Thomas Bligaard
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Publication number: 20100293927Abstract: Solid metal ammine complexes are applied for safe and high-density storage of ammonia to be released for use as reducing agent in selective catalytic reduction of NOx in exhaust gases. The compositional formula of the metal ammine complexes is M(NH3)nXz, where MZ+ represents one or more metal ions capable of binding ammonia, X represents one or more anions, n is the coordination number (from 2 to 12), and z the valency of the metal ion (and thus the total number of compensating anion charges). Ammonia is released by generating a reduced gas-phase pressure of ammonia inside the container, which is below the equilibrium desorption pressure of ammonia at the operating temperature of the storage material thus enabling the unit to be operated is a safe manner with lower operating temperature and pressure.Type: ApplicationFiled: June 29, 2006Publication date: November 25, 2010Inventors: Tue Johannessen, Rasmus Zink Sorensen, Claus Hviid Christensen, Ulrich Quaade, Jens Kehlet Norskov
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Publication number: 20100024403Abstract: A solid ammonia storage and delivery material comprising an ammonia absorbing/desorbing solid material, said storage and delivery material having been compacted to a density above 50% of the theoretic skeleton density provides a solid ammonia storage material which is easy to produce and handle and has a very high density of stored ammonia which is readily released under controlled conditions even though the porosity of the material is very low, and which storage material is safe for storage and transport of ammonia without special safety measures.Type: ApplicationFiled: October 13, 2009Publication date: February 4, 2010Applicant: Amminex A/SInventors: Tue Johannessen, Claus Hviid Christensen, Jens Kehlet Norskov, Ulrich Quaade, Rasmus Zink Sorensen
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Publication number: 20090313976Abstract: A method of storing and delivering ammonia and the use of electromagnetic radiation for desorption of ammonia from a chemical complex. Solid metal ammine complexes are applied for safe and high-density storage of ammonia to be released for use as reducing agent in selective catalytic reduction of NOx in exhaust gases. The compositional formula of the metal ammine complexes is M(NH3)nXz, where M2+ represents one or more metal ions capable of binding ammonia, X represents one or more anions, n is the coordination number (from 2 to 12), and z the valency of the metal ion (and thus the total number of compensating anion charges).Type: ApplicationFiled: February 27, 2002Publication date: December 24, 2009Applicant: Amminex A/SInventors: Tue Johannessen, Rasmus Zink Sørensen, Claus Hviid Christensen, Ulrich Quaade, Jens Kehlet Nørskov, Henning Schmidt
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Publication number: 20090280047Abstract: A solid ammonia storage and delivery material A solid ammonia storage material comprising: an ammonia absorbing salt, wherein the ammonia absorbing salt is an ionic salt of the general formula: Ma(NH3)nXz, wherein M is one or more cations selected from alkaline earth metals, and/or one or more transition metals, such as Mn, Fe, Co, Ni, Cu, and/or Zn, X is one or more anions, a is the number of cations per salt molecule, z is the number of anions per salt molecule, and ri is the coordination number of 2 to 12, wherein M is Mg provides a safe, light-weight and cheap compact storage for ammonia to be used in the automotive industry.Type: ApplicationFiled: August 3, 2005Publication date: November 12, 2009Inventors: Claus Hviid Christensen, Tue Johannessen, Ulrich Quaade, Jens Kehlet, Rasmus Zink
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Publication number: 20090246567Abstract: Process for suppressing the formation of solid carbon in a fuel cell comprising contacting a hydrocarbon feedstock with a promoted nickel-comprising anode, the promoter including gold or silver in an amount of 0.001 to 30% by weight calculated on the amount of nickel in the anode.Type: ApplicationFiled: June 10, 2004Publication date: October 1, 2009Inventors: Jens Henrik Hyldtoft, Flemming Besenbacher, Jens Kehlet Norskov, Bjerne Steffen Clausen, Ronnie Vang, Christian Gert Lundtorp Olsen, Ebbe Kruse Vestergaard
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Publication number: 20090123361Abstract: A solid ammonia storage and delivery material comprising an ammonia absorbing/desorbing solid material, said storage and delivery material having been compacted to a density above 50% of the theoretic skeleton density provides a solid ammonia storage material which is easy to produce and handle and has a very high density of stored ammonia which is readily released under controlled conditions even though the porosity of the material is very low, and which storage material is safe for storage and transport of ammonia without special safety measures.Type: ApplicationFiled: February 3, 2006Publication date: May 14, 2009Applicant: Amminex A/SInventors: Tue Johannessen, Claus Hviid Christensen, Jens Kehlet Norskov, Ulrich Quaade, Rasmus Zink Sorensen
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Patent number: 6663998Abstract: Catalyst materials having a surface comprising a composition Mx/Pty/Sub; wherein M is selected from the group of elements Fe, Co, Rh and Ir; or wherein M represents two different elements selected from the group comprising Fe, Co, Rh, Ir, Ni, Pd, Cu, Ag, Au and Sn; and wherein Sub represents a substrate material selected from Ru and Os; the respective components being present within specific ranges, display improved properties for use in anodes for low-temperature fuel cell anodes for PEMFC fuel cells and direct methanol fuel cells.Type: GrantFiled: April 5, 2001Date of Patent: December 16, 2003Assignee: The Technical University of Denmark (DTU)Inventors: Jens Kehlet Nørskov, Ping Liu
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Publication number: 20020146614Abstract: Catalyst materials having a surface comprising a composition Mx/Pty/Sub; wherein M is selected from the group of elements Fe, Co, Rh and Ir; or wherein M represents two different elements selected from the group comprising Fe, Co, Rh, Ir, Ni, Pd, Cu, Ag, Au and Sn; and wherein Sub represents a substrate material selected from Ru and Os; the respective components being present within specific ranges, display improved properties for use in anodes for low-temperature fuel cell anodes for PEMFC fuel cells and direct methanol fuel cells.Type: ApplicationFiled: April 5, 2001Publication date: October 10, 2002Inventors: Jens Kehlet Norskov, Ping Liu
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Patent number: 5997835Abstract: Process for catalytical steam reforming a carbonaceous feedstock without any carbon formation, wherein the feedstock is contacted with a nickel catalyst further including gold in an amount of 0.01 to 30% by weight calculated on the amount of nickel in the catalyst.Type: GrantFiled: June 10, 1998Date of Patent: December 7, 1999Assignee: Haldor Topsoe A/SInventors: Jens Hyldtoft, Jens Kehlet N.o slashed.rskov, Bjerne Steffen Clausen