Patents by Inventor Stafford W. Sheehan
Stafford W. Sheehan 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: 20240124792Abstract: Provided herein are systems and methods for converting CO2 and a reduction gas such as H2 or a hydrocarbon to mixtures of paraffins and aromatics suitable for use as aviation fuel.Type: ApplicationFiled: November 20, 2023Publication date: April 18, 2024Inventors: Lubo Zhou, Chi Chen, Qiyuan Wu, Stafford W. Sheehan, Namal de Silva, Mahluli Moyo, Jihad Dakka, David DeVilliers
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Patent number: 11958041Abstract: The present disclosure provides catalysts, reactor systems, and methods for the conversion of carbon dioxide and hydrogen gas into paraffins, olefins, and other hydrocarbon products. Methods for utilization of mixtures of carbon dioxide, carbon monoxide, and hydrogen gas in a manner distinct from legacy Fischer-Tropsch reactors to produce hydrocarbons is also included.Type: GrantFiled: August 8, 2023Date of Patent: April 16, 2024Assignee: Air Company Holdings, Inc.Inventors: Stafford W. Sheehan, Chi Chen, Mahlet Garedew-Ballard, Neva Luthria, Mihir R. Shah, Qiyuan Wu
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Patent number: 11919841Abstract: Methods for producing alcohols by deriving carbon dioxide from air or another dilute source, and supplying water, which is converted to hydrogen and oxygen, with subsequent conversion of the carbon dioxide and hydrogen into alcohols is disclosed. The method includes, but is not limited to including, a direct air capture system carbon dioxide, a water electrolysis unit powered by electricity, a hydrogenation reactor to convert carbon dioxide and hydrogen gases into alcohols, and a distillation system to separate alcohols or a single constituent alcohol from other hydrogenation products. Optionally, these methods may include systems capture water from air, if water or hydrogen is not available on-site, and the distillation system may use propylene glycol as an extraction solvent. This process can be used for on-site production of feedstock alcohols such as ethanol at high purity, and many other applications.Type: GrantFiled: July 27, 2022Date of Patent: March 5, 2024Assignee: Air Company Holdings, Inc.Inventor: Stafford W. Sheehan
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Publication number: 20240043464Abstract: Provided herein are methods and catalysts for the production of hexoses, pentoses, tetroses, trioses, ketoses, heptoses, aldehydes, glycolaldehyde, and glyceraldehyde from carbon dioxide using a system that does not rely on biological production methods. The process first converts carbon dioxide into an aldehyde intermediate, which is secondly used as feedstock to produce larger aldehydes and sugars in a formose reaction. The resulting process is a useful CO2 utilization method for space exploration and in-situ resource utilization, with potential application for terrestrial production of low-carbon chemicals.Type: ApplicationFiled: December 16, 2021Publication date: February 8, 2024Inventors: Stafford W. SHEEHAN, Chi CHEN
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Publication number: 20230390744Abstract: The present disclosure provides catalysts, reactor systems, and methods for the conversion of carbon dioxide and hydrogen gas into paraffins, olefins, and other hydrocarbon products. Methods for utilization of mixtures of carbon dioxide, carbon monoxide, and hydrogen gas in a manner distinct from legacy Fischer-Tropsch reactors to produce hydrocarbons is also included.Type: ApplicationFiled: August 8, 2023Publication date: December 7, 2023Inventors: Stafford W. Sheehan, Chi Chen, Mahlet Garedew-Ballard, Neva Luthria, Mihir R. Shah, Qiyuan Wu
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Publication number: 20230348347Abstract: Methods for utilizing carbon dioxide to produce multi-carbon products are disclosed. The systems and methods of the present disclosure involve: reducing CO2 to produce a first product mixture comprising an alcohol product mixture comprising one or more alcohols and a paraffin product mixture comprising one or more paraffins; dehydrating the alcohol product mixture to form an olefin product mixture comprising one or more olefins; oligomerizing the olefin product mixture to form a higher olefin product mixture comprising unsaturated paraffins and optionally aromatics; and reducing the higher olefin product mixture to form a higher hydrocarbon product mixture comprising unsaturated paraffins and optionally aromatics. Catalyst materials and reaction conditions for individual steps are disclosed to optimize yield for ethanol or jet fuel range hydrocarbons.Type: ApplicationFiled: July 10, 2023Publication date: November 2, 2023Inventors: Stafford W. Sheehan, Chi Chen, Nicholas J. Steinke
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Publication number: 20230286888Abstract: Provided herein are metal alloy components which are useful for the removal of impurities from alcohol-containing mixtures. Also provided herein are distillation apparatuses comprising the described metal alloy components, and methods for using said components and apparatuses for the removal of impurities from alcohol-containing mixtures.Type: ApplicationFiled: August 5, 2021Publication date: September 14, 2023Inventors: Stafford W. Sheehan, Michael Trainor
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Publication number: 20230256423Abstract: The present disclosure provides catalysts, comprising: copper; zinc; one or more first elements selected from iron, nickel, or cobalt; aluminum; oxygen; optionally, one or more second elements selected from a Group V, VI, VII, VIII, IX, X, and XI metal (e.g., manganese, silver, niobium, zirconium, molybdenum, ruthenium, or palladium); and optionally, one or more Group IA metals, and wherein the first element is present in an amount of about 1 to about 40 wt. % (e.g., about 1 to about 10 wt. %, about 25 to about 40 wt. %, about 30 to about 40 wt. %, or about 35 to about 40 wt. %) of the total amount of the copper, zinc, first element, the optional second element, and the optional Group IA metal, and methods of using said catalyst in the production of ethanol and higher alcohols from carbon dioxide.Type: ApplicationFiled: June 24, 2021Publication date: August 17, 2023Inventors: Stafford W. Sheehan, Chi Chen
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Publication number: 20230234037Abstract: The present invention provides a catalyst, comprising molybdenum; one or more first elements selected from a Group V, VI, VII, VIII, IX, X, and XI metal (e.g., silver, cobalt, nickel, copper, rhodium, ruthenium, iridium, palladium, niobium, and manganese); one or more second elements selected from sulfur, carbon, oxygen, phosphorus, nitrogen, and selenium; and optionally, one or more Group IA metals, wherein the molybdenum is present in an amount of 10-50 wt. % of the total amount of the one or more first elements, the molybdenum, the one or more second elements, and the Group IA metal, and methods of using said catalyst in the production of ethanol from carbon dioxide.Type: ApplicationFiled: May 5, 2021Publication date: July 27, 2023Inventors: Stafford W. Sheehan, Chi Chen
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Publication number: 20230060945Abstract: Methods for producing alcohols by deriving carbon dioxide from air or another dilute source, and supplying water, which is converted to hydrogen and oxygen, with subsequent conversion of the carbon dioxide and hydrogen into alcohols is disclosed. The method includes, but is not limited to including, a direct air capture system carbon dioxide, a water electrolysis unit powered by electricity, a hydrogenation reactor to convert carbon dioxide and hydrogen gases into alcohols, and a distillation system to separate alcohols or a single constituent alcohol from other hydrogenation products. Optionally, these methods may include systems capture water from air, if water or hydrogen is not available on-site, and the distillation system may use propylene glycol as an extraction solvent. This process can be used for on-site production of feedstock alcohols such as ethanol at high purity, and many other applications.Type: ApplicationFiled: July 27, 2022Publication date: March 2, 2023Inventor: Stafford W. Sheehan
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Publication number: 20220390769Abstract: Sleep-aiding eyewear that prevents light which inhibits melatonin production from reaching the eye is described. The eyewear that is the object of the present disclosure has improved visibility over other methods of cutting off melatonin-inhibiting wavelengths of light, which enables the user to perform tasks, such as reading and typing, uninhibited. This is achieved in some embodiments using a Bragg grating comprising multiple layers of alternating reflective index material as a surface coating on the lens. This may be combined with lens-tinting, or antireflective coatings, in the eyewear. Furthermore, transition lenses which block melatonin-shifting light when there is a suitable external stimulus, such as blue light from a light emitting diode, are described. The presently described filters are also useful for electronic displays and functional light-transmitting materials.Type: ApplicationFiled: November 10, 2020Publication date: December 8, 2022Inventors: Stafford W. Sheehan, Zachary R. Stenmark, Jordan D. Stenmark
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Patent number: 11434186Abstract: Methods for producing alcohols by deriving carbon dioxide from air or another dilute source, and supplying water, which is converted to hydrogen and oxygen, with subsequent conversion of the carbon dioxide and hydrogen into alcohols is disclosed. The method includes, but is not limited to including, a direct air capture system carbon dioxide, a water electrolysis unit powered by electricity, a hydrogenation reactor to convert carbon dioxide and hydrogen gases into alcohols, and a distillation system to separate alcohols or a single constituent alcohol from other hydrogenation products. Optionally, these methods may include systems capture water from air, if water or hydrogen is not available on-site, and the distillation system may use propylene glycol as an extraction solvent. This process can be used for on-site production of feedstock alcohols such as ethanol at high purity, and many other applications.Type: GrantFiled: June 29, 2018Date of Patent: September 6, 2022Assignee: Air Company Holdings, Inc.Inventor: Stafford W. Sheehan
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Publication number: 20220228275Abstract: Electrochemical devices, such as membrane electrode assemblies and electrochemical reactors, are described herein, as well as and methods for the conversion of reactants such as carbon dioxide to value-added products such as ethanol. In certain aspects, the membrane electrode assemblies are configured to allow for distributed pressure along the cathodic side of a membrane electrode assembly is described. The pressure vessel acts as a cathode chamber, both for the feed of reactant carbon dioxide as well as collection of products. The designs described herein improves the safety of high pressure electrochemical carbon dioxide reduction and allows for varied pressures to be used, in order to optimize reaction conditions. Configurations optimized for producing preferred products, such as ethanol, are also described.Type: ApplicationFiled: April 1, 2022Publication date: July 21, 2022Inventor: Stafford W. Sheehan
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Publication number: 20210147326Abstract: Methods for producing alcohols by deriving carbon dioxide from air or another dilute source, and supplying water, which is converted to hydrogen and oxygen, with subsequent conversion of the carbon dioxide and hydrogen into alcohols is disclosed. The method includes, but is not limited to including, a direct air capture system carbon dioxide, a water electrolysis unit powered by electricity, a hydrogenation reactor to convert carbon dioxide and hydrogen gases into alcohols, and a distillation system to separate alcohols or a single constituent alcohol from other hydrogenation products. Optionally, these methods may include systems capture water from air, if water or hydrogen is not available on-site, and the distillation system may use propylene glycol as an extraction solvent. This process can be used for on-site production of feedstock alcohols such as ethanol at high purity, and many other applications.Type: ApplicationFiled: June 29, 2018Publication date: May 20, 2021Inventor: Stafford W. Sheehan
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Patent number: 10711021Abstract: Catalysts prepared from abundant, cost effective metals, such as cobalt, nickel, chromium, manganese, iron, and copper, and containing one or more neutrally charged ligands (e.g., monodentate, bidentate, and/or polydentate ligands) and methods of making and using thereof are described herein. Exemplary ligands include, but are not limited to, phosphine ligands, nitrogen-based ligands, sulfur-based ligands, and/or arsenic-based ligands. In some embodiments, the catalyst is a cobalt-based catalyst or a nickel-based catalyst. The catalysts described herein are stable and active at neutral pH and in a wide range of buffers that are both weak and strong proton acceptors. While its activity is slightly lower than state of the art cobalt-based water oxidation catalysts under some conditions, it is capable of sustaining electrolysis at high applied potentials without a significant degradation in catalytic current. This enhanced robustness gives it an advantage in industrial and large-scale water electrolysis schemes.Type: GrantFiled: November 24, 2015Date of Patent: July 14, 2020Assignee: YALE UNIVERSITYInventors: Aaron J. Bloomfield, Stafford W. Sheehan, Samuel L. Collom, Robert H. Crabtree, Paul T. Anastas
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Patent number: 10081650Abstract: Catalysts prepared from abundant, cost effective metals, such as cobalt, nickel, chromium, manganese, iron, and copper, and containing one or more neutrally charged ligands (e.g., monodentate, bidentate, and/or polydentate ligands) and methods of making and using thereof are described herein. Exemplary ligands include, but are not limited to, phosphine ligands, nitrogen-based ligands, sulfur-based ligands, and/or arsenic-based ligands. In some embodiments, the catalyst is a cobalt-based catalyst or a nickel-based catalyst. The catalysts described herein are stable and active at neutral pH and in a wide range of buffers that are both weak and strong proton acceptors. While its activity is slightly lower than state of the art cobalt-based water oxidation catalysts under some conditions, it is capable of sustaining electrolysis at high applied potentials without a significant degradation in catalytic current. This enhanced robustness gives it an advantage in industrial and large-scale water electrolysis schemes.Type: GrantFiled: July 2, 2014Date of Patent: September 25, 2018Assignee: Yale UniversityInventors: Aaron J. Bloomfield, Stafford W. Sheehan, Samuel L. Collom, Robert H. Crabtree, Paul T. Anastas
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Publication number: 20160152648Abstract: Catalysts prepared from abundant, cost effective metals, such as cobalt, nickel, chromium, manganese, iron, and copper, and containing one or more neutrally charged ligands (e.g., monodentate, bidentate, and/or polydentate ligands) and methods of making and using thereof are described herein. Exemplary ligands include, but are not limited to, phosphine ligands, nitrogen-based ligands, sulfur-based ligands, and/or arsenic-based ligands. In some embodiments, the catalyst is a cobalt-based catalyst or a nickel-based catalyst. The catalysts described herein are stable and active at neutral pH and in a wide range of buffers that are both weak and strong proton acceptors. While its activity is slightly lower than state of the art cobalt-based water oxidation catalysts under some conditions, it is capable of sustaining electrolysis at high applied potentials without a significant degradation in catalytic current. This enhanced robustness gives it an advantage in industrial and large-scale water electrolysis schemes.Type: ApplicationFiled: November 24, 2015Publication date: June 2, 2016Inventors: Aaron J. Bloomfield, Stafford W. Sheehan, Samuel L. Collom, Robert H. Crabtree, Paul T. Anastas
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Publication number: 20150065339Abstract: Catalysts prepared from abundant, cost effective metals, such as cobalt, nickel, chromium, manganese, iron, and copper, and containing one or more neutrally charged ligands (e.g., monodentate, bidentate, and/or polydentate ligands) and methods of making and using thereof are described herein. Exemplary ligands include, but are not limited to, phosphine ligands, nitrogen-based ligands, sulfur-based ligands, and/or arsenic-based ligands. In some embodiments, the catalyst is a cobalt-based catalyst or a nickel-based catalyst. The catalysts described herein are stable and active at neutral pH and in a wide range of buffers that are both weak and strong proton acceptors. While its activity is slightly lower than state of the art cobalt-based water oxidation catalysts under some conditions, it is capable of sustaining electrolysis at high applied potentials without a significant degradation in catalytic current. This enhanced robustness gives it an advantage in industrial and large-scale water electrolysis schemes.Type: ApplicationFiled: July 2, 2014Publication date: March 5, 2015Inventors: Aaron J. Bloomfield, Stafford W. Sheehan, Samuel L. Collom, Robert H. Crabtree, Paul T. Anastas