Patents by Inventor David Ross Graham
David Ross Graham 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: 20230233986Abstract: A process for separating carbon dioxide from a feed gas comprising carbon dioxide may comprise compressing the feed gas in a feed gas compressor to produce a compressed feed gas. The process may also comprise separating the compressed feed gas by an adsorption process comprising: using a plurality of adsorbent beds to produce a carbon dioxide-enriched product stream and a carbon dioxide-depleted stream, and a blowdown step. A blowdown gas may be removed from the adsorbent bed. The process may also comprise compressing the blowdown gas in the feed gas compressor and combining the blowdown gas with the compressed feed gas.Type: ApplicationFiled: May 23, 2022Publication date: July 27, 2023Applicant: Air Products and Chemicals, Inc.Inventors: Mozhgan Alimohammadi Zanjani, David Ross Graham, Donald E. Henry, Donn Michael Herron, Roger Anthony Dewing
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Publication number: 20220252341Abstract: Integration of a natural gas liquefaction system, a hydrogen production system, and power generation system to increase CO2 capture and improve overall plant efficiency. The predominantly methane endflash is sent to the hydrogen production system which produces hydrogen and CO2. The CO2 may be captured or beneficially used. At least a portion of the hydrogen produced is used to fuel gas turbines in the power generation which, in turn, provides power for the refrigeration compressor of the natural gas liquefaction system—either in the form of mechanical work or electricity.Type: ApplicationFiled: February 5, 2021Publication date: August 11, 2022Applicant: Air Products and Chemicals, Inc.Inventors: Annemarie Ott Weist, Jeremy D. Beard, David Ross Graham, John Eugene Palamara, Mark Julian Roberts, Dejan Veskovic
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Patent number: 9708188Abstract: Methods and systems for purifying argon from a crude argon stream are disclosed, employing pressure swing adsorption at cold temperatures from ?186° C. to ?20° C.; more preferably from ?150° C. to ?50° C.; and most preferably from ?130° C. to ?80° C. with oxygen-selective zeolite adsorbent. In some embodiments, the oxygen-selective zeolite adsorbent is a 4A zeolite, a chabazite, or a combination thereof.Type: GrantFiled: February 22, 2016Date of Patent: July 18, 2017Assignee: Air Products and Chemicals, Inc.Inventors: Shubhra Jyoti Bhadra, Roger Dean Whitley, Garret Chi-Ho Lau, David Ross Graham, Donn Michael Herron, Qiao Zhao, Erin Marie Sorensen
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Patent number: 9624105Abstract: Process for producing a hydrogen-containing product gas while impeding corrosion of piping operatively connecting a condensate separator and a pressure swing adsorption unit by heating the effluent gas stream from the condensate separator well above the dew point of the effluent gas stream to prevent liquid water in the stream. Heating of the effluent gas stream is provided without deteriorating the energy efficiency of the process.Type: GrantFiled: November 24, 2015Date of Patent: April 18, 2017Assignee: Air Products and Chemicals, Inc.Inventors: Michael Andrew Sicinski, David Ross Graham, Kelly Ann Forester, Candice Daibes Silvestre, Gerald Michael Loughney
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Patent number: 8683825Abstract: A system and method for recovering helium-3 from helium. A distillation column having a top section that is smaller in diameter than a main section is provided. The column also includes an intermediate condenser that condenses vapor from the main section and above a helium feed stream. Reflux to the column can be provided by liquid helium-3 from a conduit or from an overhead condenser. In a preferred cycle, the distillation column is operated at a subatmospheric pressure, and in a temperature range between 2.3 K and 4.3 K.Type: GrantFiled: February 14, 2013Date of Patent: April 1, 2014Assignee: Air Products and Chemicals, Inc.Inventors: Jianguo Xu, David Ross Graham, Vipul S. Parekh
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Patent number: 8671715Abstract: A system and method for recovering helium-3 from helium. A distillation column having a top section that is smaller in diameter than a main section is provided. The column also includes an intermediate condenser located in the main section and above a helium feed stream. Reflux to the column can be provided by liquid helium-3 from a conduit or from an overhead condenser. In a preferred cycle, the distillation column is operated at a subatmospheric pressure, and in a temperature range between 2.3 K and 4.3 K.Type: GrantFiled: February 23, 2012Date of Patent: March 18, 2014Assignee: Air Products and Chemicals, Inc.Inventors: Jianguo Xu, David Ross Graham, Vipul S. Parekh
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Publication number: 20130219956Abstract: A system and method for recovering helium-3 from helium. A distillation column having a top section that is smaller in diameter than a main section is provided. The column also includes an intermediate condenser located in the main section and above a helium feed stream. Reflux to the column can be provided by liquid helium-3 from a conduit or from an overhead condenser. In a preferred cycle, the distillation column is operated at a subatmospheric pressure, and in a temperature range between 2.3 K and 4.3 K.Type: ApplicationFiled: February 23, 2012Publication date: August 29, 2013Applicant: Air Products and Chemicals, Inc.Inventors: Jianguo Xu, David Ross Graham, Vipul S. Parekh
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Patent number: 7569294Abstract: Battery charging system comprising a hydrogen source module adapted to provide gaseous hydrogen; a hydrogen fuel cell power module comprising a hydrogen fuel cell and a power delivery outlet unit adapted to transfer power generated by the fuel cell to a secondary battery for recharging the secondary battery; and coupling and transfer means adapted to connect and disconnect the hydrogen source module and the hydrogen fuel cell power module.Type: GrantFiled: December 23, 2004Date of Patent: August 4, 2009Assignee: Air Products and Chemicals, Inc.Inventors: David Ross Graham, George Amir Meski, Jianguo Xu, Robert Francis Horninger
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Patent number: 7501009Abstract: A method and apparatus for producing high purity argon by combined cryogenic distillation and adsorption technologies is disclosed. Crude argon from a distillation column or a so-called argon column is passed to a system of adsorption vessels for further purification. Depressurization gas from adsorption is introduced back, in a controlled manner, to the distillation column and/or a compressor or other means for increasing pressure. Particulate filtration and getter purification may optionally be used.Type: GrantFiled: March 10, 2006Date of Patent: March 10, 2009Assignee: Air Products and Chemicals, Inc.Inventors: David Ross Graham, Justin David Bukowski, Jung Soo Choe, Donn Michael Herron, Sang Kook Lee
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Patent number: 7396381Abstract: The present invention is directed to improvements in storage and delivery systems that allow for rapid fill and delivery of gases reversibly stored in a nonvolatile liquid medium, improvements in delivery and purity of the delivered gas. The low pressure storage and delivery system for gas which comprises: a container having an interior portion containing a reactive Lewis basic or Lewis acidic reactive liquid medium that is reversibly reacted with a gas having opposing Lewis acidity or basicity; a system for transferring energy into or out of the reactive liquid medium; or, a product gas purifier (e.g. a gas/liquid separator); or both.Type: GrantFiled: July 8, 2004Date of Patent: July 8, 2008Assignee: Air Products and Chemicals, Inc.Inventors: David Ross Graham, Daniel Joseph Tempel, Bernard Allen Toseland, Philip Bruce Henderson, James Joseph Hart, John Bruce Appleby, Jeffrey Richard Brzozowski, Pushpinder Singh Puri
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Patent number: 7302812Abstract: A process for producing an isotopically enriched compound of a desired isotope includes (a) providing a cryogenic reaction zone containing a catalyst adapted to catalyze an isotope exchange reaction at a cryogenic reaction temperature, (b) feeding to the cryogenic reaction zone an enriched mixture comprising at least a compound containing the desired isotope, wherein the enriched mixture is enriched in the desired isotope above a natural abundance of the desired isotope, (c) reacting the enriched mixture in the cryogenic reaction zone thereby forming a resulting mixture containing the isotopically enriched compound, and (d) separating the resulting mixture into an enriched product which is enriched in the isotopically enriched compound and a depleted product which is depleted in the isotopically enriched compound.Type: GrantFiled: September 2, 2003Date of Patent: December 4, 2007Assignee: Air Products and Chemicals, Inc.Inventors: Matthew Joseph Okasinski, David Ross Graham, Adam Adrian Brostow, Madhukar Bhaskara Rao
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Patent number: 6866075Abstract: Apparatus for dispersing particles flowing from an orifice comprising a deflecting surface disposed relative to the orifice, wherein the deflecting surface is fixed relative to the orifice, whereby particles flowing from the orifice can impinge upon and can be dispersed by the deflecting surface, wherein the orifice is one of a plurality of orifices disposed in a wall of a conduit, and wherein the conduit has an axis which is oriented between about 45 degrees and about 70 degrees from the vertical such that particles can flow through the conduit and through the orifices by gravity.Type: GrantFiled: August 9, 2002Date of Patent: March 15, 2005Assignee: Air Products and Chemicals, Inc.Inventors: Roger Dean Whitley, Stephen Clyde Tentarelli, David Ross Graham, Craig E. Steigerwalt, Luigi Depari
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Patent number: 6802889Abstract: Rapid cycle pressure swing adsorption processes, systems and apparatus for the separation of a multi-component feed gas mixture by selectively adsorbing at least one more readily adsorbable component in a bed of adsorbent material are provided.Type: GrantFiled: December 5, 2002Date of Patent: October 12, 2004Assignee: Air Products and Chemicals, Inc.Inventors: David Ross Graham, James Michael Occhialini, Pushpinder Singh Puri
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Publication number: 20040107831Abstract: Rapid cycle pressure swing adsorption processes, systems and apparatus for the separation of a multi-component feed gas mixture by selectively adsorbing at least one more readily adsorbable component in a bed of adsorbent material are provided.Type: ApplicationFiled: December 5, 2002Publication date: June 10, 2004Inventors: David Ross Graham, James Michael Occhialini, Pushpinder Singh Puri
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Patent number: 6719007Abstract: Apparatus for attenuating the amplitude of a time-variant property of a fluid stream which comprises an enclosed volume, wherein the enclosed volume includes a mixing zone having an inlet and three or more outlets; piping means for introducing an inlet fluid stream into the inlet of the mixing zone; and piping means for withdrawing from the mixing zone three or more individual fluid portions through the three or more outlets and combining the three or more individual fluid portions into an outlet fluid stream. The distance between at least one pair of adjacent outlets may be different than the distance between another pair of adjacent outlets, and the distance between adjacent outlets may decrease as the distance of each outlet from the inlet increases.Type: GrantFiled: June 11, 2003Date of Patent: April 13, 2004Assignee: Air Products and Chemicals, Inc.Inventors: Oliver Jacob Smith, IV, David Ross Graham
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Publication number: 20040025966Abstract: Apparatus for dispersing particles flowing from an orifice comprising a deflecting surface disposed relative to the orifice, wherein the deflecting surface is fixed relative to the orifice, whereby particles flowing from the orifice can impinge upon and can be dispersed by the deflecting surface.Type: ApplicationFiled: August 9, 2002Publication date: February 12, 2004Inventors: Roger Dean Whitley, Stephen Clyde Tentarelli, David Ross Graham, Craig E. Steigerwalt, Luigi Depari
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Publication number: 20030196710Abstract: A method to reduce or attenuate the amplitude of time-variant properties of a fluid stream by introducing the stream into a defined enclosed volume in a controlled manner such that the residence time distribution of the fluid exiting the enclosed volume approaches that of a preferred flat residence time distribution. This is accomplished by the concept of temporal mixing in which different residence times are imparted to a fluid in a mixing zone by physically dividing the fluid into individual portions, each of which has a different residence time while passing through the mixing zone. The desired fluid portions are created by means of specifically-designed multiple inlets into the mixing zone and/or by means of specifically-designed multiple outlets from the mixing zone.Type: ApplicationFiled: June 11, 2003Publication date: October 23, 2003Inventors: Oliver Jacob Smith, David Ross Graham
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Patent number: 6607006Abstract: A method to reduce or attenuate the amplitude of time-variant properties of a fluid stream by introducing the stream into a defined enclosed volume in a controlled manner such that the residence time distribution of the fluid exiting the enclosed volume approaches that of a preferred flat residence time distribution. This is accomplished by the concept of temporal mixing in which different residence times are imparted to a fluid in a mixing zone by physically dividing the fluid into individual portions, each of which has a different residence time while passing through the mixing zone. The desired fluid portions are created by means of specifically-designed multiple inlets into the mixing zone and/or by means of specifically-designed multiple outlets from the mixing zone.Type: GrantFiled: July 10, 2001Date of Patent: August 19, 2003Assignee: Air Products and Chemicals, Inc.Inventors: Oliver Jacob Smith, IV, David Ross Graham
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Patent number: 6605136Abstract: A pressure swing adsorption process which comprises introducing a feed gas mixture into an inlet of an adsorber vessel during a feed period, wherein the feed gas mixture contains a more strongly adsorbable component and a less strongly adsorbable component and the adsorber vessel contains a bed of adsorbent material which selectively adsorbs the more strongly adsorbable component, and withdrawing a product gas enriched in the less strongly adsorbable component from an outlet of the adsorber vessel during at least a portion of the feed period, wherein a dimensionless cycle-compensated mass transfer coefficient defined as K tfeedVads/Vfeed is maintained in the range of about 23 to about 250.Type: GrantFiled: July 10, 2002Date of Patent: August 12, 2003Assignee: Air Products and Chemicals, Inc.Inventors: David Ross Graham, Roger Dean Whitley, Robert Ling Chiang, Edward Landis Weist, Jr., Timothy Christopher Golden, Matthew James Labuda
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Publication number: 20030075222Abstract: A method to reduce or attenuate the amplitude of time-variant properties of a fluid stream by introducing the stream into a defined enclosed volume in a controlled manner such that the residence time distribution of the fluid exiting the enclosed volume approaches that of a preferred flat residence time distribution. This is accomplished by the concept of temporal mixing in which different residence times are imparted to a fluid in a mixing zone by physically dividing the fluid into individual portions, each of which has a different residence time while passing through the mixing zone. The desired fluid portions are created by means of specifically-designed multiple inlets into the mixing zone and/or by means of specifically-designed multiple outlets from the mixing zone.Type: ApplicationFiled: July 10, 2001Publication date: April 24, 2003Inventors: Oliver Jacob Smith, David Ross Graham