Patents by Inventor Piotr Zelenay
Piotr Zelenay 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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Patent number: 11826721Abstract: Metal nanoparticle-deposited, nitrogen-doped carbon adsorbents are disclosed, along with methods of removing sulfur compounds from a hydrocarbon feed stream using these adsorbents.Type: GrantFiled: November 23, 2021Date of Patent: November 28, 2023Assignees: CHEVRON U.S.A. INC., TRIAD NATIONAL SECURITY, LLCInventors: Bi-Zeng Zhan, Zunqing He, Hoon Taek Chung, Piotr Zelenay
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Publication number: 20220080382Abstract: Metal nanoparticle-deposited, nitrogen-doped carbon adsorbents are disclosed, along with methods of removing sulfur compounds from a hydrocarbon feed stream using these adsorbents.Type: ApplicationFiled: November 23, 2021Publication date: March 17, 2022Inventors: Bi-Zeng ZHAN, Zunqing HE, Hoon Taek CHUNG, Piotr ZELENAY
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Publication number: 20190262798Abstract: Metal nanoparticle-deposited, nitrogen-doped carbon adsorbents are disclosed, along with methods of removing sulfur compounds from a hydrocarbon feed stream using these adsorbents.Type: ApplicationFiled: February 26, 2019Publication date: August 29, 2019Inventors: Bi-Zeng ZHAN, Zunqing HE, Hoon Taek CHUNG, Piotr ZELENAY
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Patent number: 9979026Abstract: A catalyst for oxygen reduction reaction (ORR) for a fuel cell was prepared by pyrolyzing a mixture of polyaniline, cyanamide, carbon black, and a non-precious metal salt under an inert atmosphere. The pyrolyzed product was treated to remove acid soluble components and then pyrolyzed again. The resulting powder was used to prepare a cathode for a membrane electrode assembly that was used in a fuel cell. When iron(III) chloride was used as the salt, the resulting catalyst was porous with a web-shaped structure. It displayed a maximum power density of 0.79 W/cm at 0.4 V in H2/O2 at 1.0 bar back pressure.Type: GrantFiled: September 30, 2013Date of Patent: May 22, 2018Assignee: Los Alamos National Security, LLCInventors: Hoon Taek Chung, Piotr Zelenay
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Publication number: 20170098829Abstract: A method of producing a catalyst suitable for use in a membrane electrode assembly involves providing a mixture comprising a polyaniline precursor and a catalyst support; adding to said mixture an oxidant and a compound comprising a transition metal; agitating said mixture sufficiently to result in polyaniline polymerization; drying the mixture; heating the dried mixture in an inert atmosphere at a temperature of from about 400° C. to about 1000° C.; leaching the mixture with an acid solution; heating the resulting mixture in an inert atmosphere at a temperature of from about 400° C. to about 1000° C. The second heating improves the performance of the catalyst.Type: ApplicationFiled: October 11, 2016Publication date: April 6, 2017Inventors: Piotr Zelenay, Gang Wu
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Publication number: 20160351915Abstract: A catalyst for oxygen reduction reaction (ORR) for a fuel cell was prepared by pyrolyzing a mixture of polyaniline, cyanamide, carbon black, and a non-precious metal salt under an inert atmosphere. The pyrolyzed product was treated to remove acid soluble components and then pyrolyzed again. The resulting powder was used to prepare a cathode for a membrane electrode assembly that was used in a fuel cell. When iron(III) chloride was used as the salt, the resulting catalyst was porous with a web-shaped structure. It displayed a maximum power density of 0.79 W/cm at 0.4 V in H2/O2 at 1.0 bar back pressure.Type: ApplicationFiled: September 30, 2013Publication date: December 1, 2016Applicant: Los Alamos National Security, LLCInventors: Hoon Taek CHUNG, Piotr ZELENAY
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Patent number: 9334575Abstract: A composition for oxidizing dimethyl ether includes an alloy supported on carbon, the alloy being of platinum, ruthenium, and palladium. A process for oxidizing dimethyl ether involves exposing dimethyl ether to a carbon-supported alloy of platinum, ruthenium, and palladium under conditions sufficient to electrochemically oxidize the dimethyl ether.Type: GrantFiled: March 15, 2013Date of Patent: May 10, 2016Assignee: Los Alamos National Security, LLCInventors: Piotr Zelenay, Gang Wu, Christina M. Johnston, Qing Li
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Patent number: 9216900Abstract: A method for synthesizing nitrogen-doped carbon tubes involves preparing a solution of cyanamide and a suitable transition metal-containing salt in a solvent, evaporating the solvent to form a solid, and pyrolyzing the solid under an inert atmosphere under conditions suitable for the production of nitrogen-doped carbon tubes from the solid. Pyrolyzing for a shorter period of time followed by rapid cooling resulted in a tubes with a narrower average diameter.Type: GrantFiled: August 29, 2011Date of Patent: December 22, 2015Assignee: Los Alamos National Security, LLCInventors: Hoon Taek Chung, Piotr Zelenay
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Patent number: 9169140Abstract: Catalyst comprising graphitic carbon and methods of making thereof; said graphitic carbon comprising a metal species, a nitrogen-containing species and a sulfur containing species. A catalyst for oxygen reduction reaction for an alkaline fuel cell was prepared by heating a mixture of cyanamide, carbon black, and a salt selected from an iron sulfate salt and an iron acetate salt at a temperature of from about 700° C. to about 1100° C. under an inert atmosphere. Afterward, the mixture was treated with sulfuric acid at elevated temperature to remove acid soluble components, and the resultant mixture was heated again under an inert atmosphere at the same temperature as the first heat treatment step.Type: GrantFiled: September 21, 2011Date of Patent: October 27, 2015Assignee: Los Alamos National Security, LLCInventors: Hoon Taek Chung, Piotr Zelenay
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Patent number: 8906575Abstract: An electrochemical cell assembly that is expected to prevent or at least minimize electrode contamination includes one or more getters that trap a component or components leached from a first electrode and prevents or at least minimizes them from contaminating a second electrode.Type: GrantFiled: March 5, 2012Date of Patent: December 9, 2014Assignee: Los Alamos National Security, LLCInventors: Yu Seung Kim, Piotr Zelenay, Christina Johnston
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Patent number: 8709295Abstract: A Fe—Co hybrid catalyst for oxygen reaction reduction was prepared by a two part process. The first part involves reacting an ethyleneamine with a cobalt-containing precursor to form a cobalt-containing complex, combining the cobalt-containing complex with an electroconductive carbon supporting material, heating the cobalt-containing complex and carbon supporting material under conditions suitable to convert the cobalt-containing complex and carbon supporting material into a cobalt-containing catalyst support. The second part of the process involves polymerizing an aniline in the presence of said cobalt-containing catalyst support and an iron-containing compound under conditions suitable to form a supported, cobalt-containing, iron-bound polyaniline species, and subjecting said supported, cobalt-containing, iron bound polyaniline species to conditions suitable for producing a Fe—Co hybrid catalyst.Type: GrantFiled: April 26, 2011Date of Patent: April 29, 2014Assignee: Los Alamos National Security, LLCInventors: Piotr Zelenay, Gang Wu
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Publication number: 20140045098Abstract: A catalyst for oxygen reduction reaction (ORR) for a fuel cell was prepared by pyrolyzing a mixture of polyaniline, cyanamide, carbon black, and a non-precious metal salt under an inert atmosphere. The pyrolyzed product was treated to remove acid soluble components and then pyrolyzed again. The resulting powder was used to prepare a cathode for a membrane electrode assembly that was used in a fuel cell. When iron(III) chloride was used as the salt, the resulting catalyst was porous with a web-shaped structure. It displayed a maximum power density of 0.79 W/cm at 0.4 V in H2/O2 at 1.0 bar back pressure.Type: ApplicationFiled: September 30, 2013Publication date: February 13, 2014Applicant: Los Alamos National Security, LLCInventors: Hoon Taek CHUNG, Piotr ZELENAY
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Publication number: 20140024521Abstract: A Fe—Co hybrid catalyst for oxygen reaction reduction was prepared by a two part process. The first part involves reacting an ethyleneamine with a cobalt-containing precursor to form a cobalt-containing complex, combining the cobalt-containing complex with an electroconductive carbon supporting material, heating the cobalt-containing complex and carbon supporting material under conditions suitable to convert the cobalt-containing complex and carbon supporting material into a cobalt-containing catalyst support. The second part of the process involves polymerizing an aniline in the presence of said cobalt-containing catalyst support and an iron-containing compound conditions suitable to form a supported, cobalt-containing, iron-bound polyaniline species, and subjecting said supported, cobalt-containing, iron bound polyaniline species to conditions suitable for producing a Fe—Co hybrid catalyst.Type: ApplicationFiled: September 19, 2013Publication date: January 23, 2014Applicant: LOS ALAMOS NATIONAL SECURITY, LLCInventors: Piotr Zelenay, Gang Wu
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Patent number: 8518608Abstract: A process for preparing a durable non-precious metal oxygen reduction electrocatalyst involves heat treatment of a ball-milled mixture of polyaniline and multiwalled carbon nanotubes in the presence of a Fe species. The catalyst is more durable than catalysts that use carbon black supports. Performance degradation was minimal or absent after 500 hours of operation at constant cell voltage of 0.40 V.Type: GrantFiled: May 11, 2011Date of Patent: August 27, 2013Assignee: Los Alamos National Security, LLCInventors: Gang Wu, Piotr Zelenay
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Publication number: 20130048919Abstract: A method for synthesizing nitrogen-doped carbon tubes involves preparing a solution of cyanamide and a suitable transition metal-containing salt in a solvent, evaporating the solvent to form a solid, and pyrolyzing the solid under an inert atmosphere under conditions suitable for the production of nitrogen-doped carbon tubes from the solid. Pyrolyzing for a shorter period of time followed by rapid cooling resulted in a tubes with a narrower average diameter.Type: ApplicationFiled: August 29, 2011Publication date: February 28, 2013Applicant: Los Alamos National Security, LLCInventors: Hoon Taek Chung, Piotr Zelenay
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Publication number: 20120225370Abstract: An electrochemical cell assembly that is expected to prevent or at least minimize electrode contamination includes one or more getters that trap a component or components leached from a first electrode and prevents or at least minimizes them from contaminating a second electrode.Type: ApplicationFiled: March 5, 2012Publication date: September 6, 2012Applicant: LOS ALAMOS NATIONAL SECURITY, LLCInventors: Yu Seung Kim, Piotr Zelenay, Christina Johnston
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Publication number: 20120088187Abstract: A method of producing a catalyst suitable for use in a membrane electrode assembly involves providing a mixture comprising a polyaniline precursor and a catalyst support; adding to said mixture an oxidant and a compound comprising a transition metal; agitating said mixture sufficiently to result in polyaniline polymerization; drying the mixture; heating the dried mixture in an inert atmosphere at a temperature of from about 400° C. to about 1000° C.; leaching the mixture with an acid solution; heating the resulting mixture in an inert atmosphere at a temperature of from about 400° C. to about 1000° C. The second heating improves the performance of the catalyst.Type: ApplicationFiled: October 6, 2011Publication date: April 12, 2012Applicant: LOS ALAMOS NATIONAL SECURITY, LLCInventors: Gang Wu, Piotr Zelenay
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Publication number: 20120070764Abstract: Catalyst comprising graphitic carbon and methods of making thereof; said graphitic carbon comprising a metal species, a nitrogen-containing species and a sulfur containing species. A catalyst for oxygen reduction reaction for an alkaline fuel cell was prepared by heating a mixture of cyanamide, carbon black, and a salt selected from an iron sulfate salt and an iron acetate salt at a temperature of from about 700° C. to about 1100° C. under an inert atmosphere. Afterward, the mixture was treated with sulfuric acid at elevated temperature to remove acid soluble components, and the resultant mixture was heated again under an inert atmosphere at the same temperature as the first heat treatment step.Type: ApplicationFiled: September 21, 2011Publication date: March 22, 2012Applicant: LOS ALAMOS NATIONAL SECURITY, LLCInventors: Hoon Taek Chung, Piotr Zelenay
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Publication number: 20110281204Abstract: A process for preparing a durable non-precious metal oxygen reduction electrocatalyst involves heat treatment of a ball-milled mixture of polyaniline and multiwalled carbon nanotubes in the presence of a Fe species. The catalyst is more durable than catalysts that use carbon black supports. Performance degradation was minimal or absent after 500 hours of operation at constant cell voltage of 0.40 V.Type: ApplicationFiled: May 11, 2011Publication date: November 17, 2011Applicant: Los Alamos National Security, LLCInventors: Gang Wu, Piotr Zelenay
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Publication number: 20110260119Abstract: A Fe—Co hybrid catalyst for oxygen reaction reduction was prepared by a two part process. The first part involves reacting an ethyleneamine with a cobalt-containing precursor to form a cobalt-containing complex, combining the cobalt-containing complex with an electroconductive carbon supporting material, heating the cobalt-containing complex and carbon supporting material under conditions suitable to convert the cobalt-containing complex and carbon supporting material into a cobalt-containing catalyst support. The second part of the process involves polymerizing an aniline in the presence of said cobalt-containing catalyst support and an iron-containing compound under conditions suitable to form a supported, cobalt-containing, iron-bound polyaniline species, and subjecting said supported, cobalt-containing, iron bound polyaniline species to conditions suitable for producing a Fe—Co hybrid catalyst.Type: ApplicationFiled: April 26, 2011Publication date: October 27, 2011Applicant: Los Alamos National Security, LLCInventors: Piotr Zelenay, Gang Wu