Patents by Inventor Cem E. Celik
Cem E. Celik 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: 11850553Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers. Alternatively, the pre-purification systems and methods employ a hopcalite catalyst layer and a noble metal catalyst layer separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layer.Type: GrantFiled: January 29, 2021Date of Patent: December 26, 2023Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Ralph J. Mancini, Cem E. Celik, Matthias Grahl, Arthur C. Selover, Sesha Hari Vemuri, Helko Schneider
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Patent number: 11826703Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers.Type: GrantFiled: October 4, 2022Date of Patent: November 28, 2023Assignee: Praxair Technology, Inc.Inventors: Ralph J. Mancini, Cem E. Celik, Matthias Grahl, Arthur C. Selover, Sesha Hari Vemuri, Helko Schneider
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Publication number: 20230285898Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers. The separate layers of hopcalite catalyst preferably have different volumes and/or different average particle sizes of the hopcalite materials.Type: ApplicationFiled: May 22, 2023Publication date: September 14, 2023Inventors: Ralph J. Mancini, Cem E. Celik, Arthur C. Selover, Sesha Hari Vemuri, Thomas A. McNamara, Matthias Grahl, Helko Schneider
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Publication number: 20230249130Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers.Type: ApplicationFiled: April 21, 2023Publication date: August 10, 2023Inventors: Ralph J. Mancini, Cem E. Celik, Matthias Grahl, Arthur C. Selover, Sesha Hari Vemuri, Helko Schneider
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Patent number: 11666861Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers.Type: GrantFiled: June 29, 2021Date of Patent: June 6, 2023Inventors: Ralph J. Mancini, Cem E. Celik, Matthias Grahl, Arthur C. Selover, Sesha Hari Vemuri, Helko Schneider
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Patent number: 11619442Abstract: A system and method of regenerating a pre-purification vessel is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit that uses an oxygen-enriched purge gas stream for regeneration of the pre-purification unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the water, carbon dioxide and other impurities from a feed air stream, optionally including hydrogen and carbon monoxide impurities. The method of regenerating a pre-purification vessel preferably involves regenerating the pre-purification vessel with an oxygen-enriched purge gas after depressurization of the vessel and thereafter partially repressurizing the pre-purification vessel with an auxiliary purge gas thereby diluting the oxygen concentration of the gases contained in the pre-purification vessel and optionally depressurizing the partially repressurized vessel.Type: GrantFiled: April 19, 2021Date of Patent: April 4, 2023Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: James R. Handley, Richard C. Cyganovich, Cem E. Celik, Brian S. Powell, Devang Ashok Dasani
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Publication number: 20230042248Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers.Type: ApplicationFiled: October 4, 2022Publication date: February 9, 2023Inventors: Ralph J. Mancini, Cem E. Celik, Matthias Grahl, Arthur C. Selover, Sesha Hari Vemuri, Helko Schneider
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Publication number: 20220333860Abstract: A system and method of regenerating a pre-purification vessel is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit that uses an oxygen-enriched purge gas stream for regeneration of the pre-purification unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the water, carbon dioxide and other impurities from a feed air stream, optionally including hydrogen and carbon monoxide impurities. The method of regenerating a pre-purification vessel preferably involves regenerating the pre-purification vessel with an oxygen-enriched purge gas after depressurization of the vessel and thereafter partially repressurizing the pre-purification vessel with an auxiliary purge gas thereby diluting the oxygen concentration of the gases contained in the pre-purification vessel and optionally depressurizing the partially repressurized vessel.Type: ApplicationFiled: April 19, 2021Publication date: October 20, 2022Inventors: James R. Handley, Richard C. Cyganovich, Cem E. Celik, Brian S. Powell, Devang Ashok Dasani
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Patent number: 11359859Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers. Alternatively, the pre-purification systems and methods employ a hopcalite catalyst layer and a noble metal catalyst layer separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layer.Type: GrantFiled: April 15, 2021Date of Patent: June 14, 2022Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Cem E. Celik, Arthur C. Selover, Sesha Hari Vemuri
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Publication number: 20220057137Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers. Alternatively, the pre-purification systems and methods employ a hopcalite catalyst layer and a noble metal catalyst layer separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layer.Type: ApplicationFiled: April 15, 2021Publication date: February 24, 2022Inventors: Cem E. Celik, Arthur C. Selover, Sesha Hari Vemuri
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Publication number: 20220054976Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers.Type: ApplicationFiled: June 29, 2021Publication date: February 24, 2022Inventors: Ralph J. Mancini, Cem E. Celik, Matthias Grahl, Arthur C. Selover, Sesha Hari Vemuri, Helko Schneider
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Publication number: 20220054975Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers. Alternatively, the pre-purification systems and methods employ a hopcalite catalyst layer and a noble metal catalyst layer separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layer.Type: ApplicationFiled: January 29, 2021Publication date: February 24, 2022Inventors: Ralph J. Mancini, Cem E. Celik, Matthias Grahi, Arthur C. Selover, Sesha Hari Vemuri, Helko Schneider
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Patent number: 10427090Abstract: The present invention relates to a method of controlling prepurifier cycle time by monitoring ambient CO2 level in order to prevent CO2 breakthrough occurrences caused by extreme instantaneous variations in ambient CO2 level. Rather than operating solely by prepurifier design bed capacity, the method of the invention continuously updates bed capacity for the contaminants using the feed temperature, pressure and contaminants composition, calculating the total amount of contaminants that were fed to the prepurifier during the feed step and estimates the perturbation front velocity, i.e., the velocity at which the contaminants front coming from an extreme instantaneous variations of ambient level is going to propagate inside the adsorbents bed. Estimating the perturbation front velocity allows for a more precise estimate of the maximum time remaining for the feed step before starting to experience CO2 breakthrough.Type: GrantFiled: October 18, 2017Date of Patent: October 1, 2019Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Olivier Dube, Cem E. Celik, Thomas A. McNamara
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Publication number: 20190111377Abstract: The present invention relates to a method of controlling prepurifier cycle time by monitoring ambient CO2 level in order to prevent CO2 breakthrough occurrences caused by extreme instantaneous variations in ambient CO2 level. Rather than operating solely by prepurifier design bed capacity, the method of the invention continuously updates bed capacity for the contaminants using the feed temperature, pressure and contaminants composition, calculating the total amount of contaminants that were fed to the prepurifier during the feed step and estimates the perturbation front velocity, i.e., the velocity at which the contaminants front coming from an extreme instantaneous variations of ambient level is going to propagate inside the adsorbents bed. Estimating the perturbation front velocity allows for a more precise estimate of the maximum time remaining for the feed step before starting to experience CO2 breakthrough.Type: ApplicationFiled: October 18, 2017Publication date: April 18, 2019Inventors: Olivier Dube, Cem E. Celik, Thomas A. McNamara
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Patent number: 10105637Abstract: In a cyclic adsorptive gas purification process, an impurity laden adsorbent is regenerated by exposing it first to an unheated gas for a pre-determined time period to desorb at least some of the impurity, followed by heating the adsorbent using a flowing stream of a heated gas to desorb the remaining impurities over another pre-determined time period, further followed by cooling of the adsorbent using a flowing stream of gas for yet another pre-determined time period to make it ready for repeating the adsorptive cycle. Introducing an unheated purge stream reduces the energy requirements for the regeneration step compared to a traditional TSA process.Type: GrantFiled: September 19, 2016Date of Patent: October 23, 2018Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Mohamed Hashi, Cem E. Celik, James R. Dray
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Publication number: 20170087505Abstract: In a cyclic adsorptive gas purification process, an impurity laden adsorbent is regenerated by exposing it first to an unheated gas for a pre-determined time period to desorb at least some of the impurity, followed by heating the adsorbent using a flowing stream of a heated gas to desorb the remaining impurities over another pre-determined time period, further followed by cooling of the adsorbent using a flowing stream of gas for yet another pre-determined time period to make it ready for repeating the adsorptive cycle. Introducing an unheated purge stream reduces the energy requirements for the regeneration step compared to a traditional TSA process.Type: ApplicationFiled: September 19, 2016Publication date: March 30, 2017Inventors: Mohamed Hashi, Cem E. Celik, James R. Dray
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Patent number: 8851742Abstract: The present invention relates generally to methods and systems for mixing at least two different solid materials (e.g., adsorbents) and loading the mixture into a vessel, such as an adsorption vessel or reactor.Type: GrantFiled: September 9, 2013Date of Patent: October 7, 2014Assignee: Praxair Technology, Inc.Inventors: Cem E. Celik, Mark William Ackley, Jeffert John Nowobilski, Salil Uday Rege
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Publication number: 20140003186Abstract: The present invention relates generally to methods and systems for mixing at least two different solid materials (e.g., adsorbents) and loading the mixture into a vessel, such as an adsorption vessel or reactor.Type: ApplicationFiled: September 9, 2013Publication date: January 2, 2014Inventors: CEM E. CELIK, Mark William Ackley, Jeffert John Nowobilski, Salil Uday Rege
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Patent number: 8573831Abstract: The present invention relates generally to methods and systems for mixing at least two different solid materials (e.g., adsorbents) and loading the mixture into a vessel, such as an adsorption vessel or reactor.Type: GrantFiled: May 1, 2007Date of Patent: November 5, 2013Assignee: Praxair Technology, Inc.Inventors: Cem E. Celik, Mark William Ackley, Jeffert John Nowobilski, Salil Uday Rege
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Patent number: 8545604Abstract: A modular and compact adsorbent bed structure is disclosed for use in an adsorption-based gas separation plant. The conventional adsorbent bed in a gas separation plant is replaced with a plurality of modular adsorbent bed units connected to make the adsorbent bed structure. The modular design requires lower fabrication and maintenance costs; is easier to transport; and is easier to load with adsorbent material.Type: GrantFiled: December 19, 2012Date of Patent: October 1, 2013Assignee: Praxair Technology, Inc.Inventors: Ashwin Desai, Cem E. Celik, Mark William Ackley, James Smolarek