Patents by Inventor Michelle Roaf

Michelle Roaf 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).

  • Dehydration of carbon dioxide
    Patent number: 12280330
    Abstract: A method and system for purifying a carbon dioxide feed stream in which the carbon dioxide feed stream is cooled and partially condensed to remove water upstream of an adsorber to produce a dry carbon dioxide stream. The dry carbon dioxide stream is further cooled and partially condensed in a carbon dioxide purification unit to form a carbon dioxide product stream. Excess refrigeration duty from the carbon dioxide purification unit is used to cool the carbon dioxide feed stream.
    Type: Grant
    Filed: July 1, 2022
    Date of Patent: April 22, 2025
    Assignee: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Paul Higginbotham, Dingjun Wu, Gowri Krishnamurthy, Todd M. Moyle, Michelle Roaf, Mozhgan Alimohammadi Zanjani
  • CO2 PIPELINE CORROSION
    Publication number: 20250066664
    Abstract: A method for corrosion control is disclosed, wherein the method includes limiting all components involved in sulfuric acid formation to low levels. The components include, but may not be limited to oxygen, nitrogen oxides, sulfur oxides, and H2S. The method may also include maintaining the H2S level above typical pipeline concentrations to inhibit the reactions to form sulfuric acid in the pipeline.
    Type: Application
    Filed: July 24, 2024
    Publication date: February 27, 2025
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Venkataramanan Ravi, Eryk Remiezowicz, Sameer V. Ghalsasi, Vipul S. Parekh, Micah S. Kiffer, Michelle Roaf
  • DEHYDRATION OF CARBON DIOXIDE
    Publication number: 20240001282
    Abstract: A method and system for purifying a carbon dioxide feed stream in which the carbon dioxide feed stream is cooled and partially condensed to remove water upstream of an adsorber to produce a dry carbon dioxide stream. The dry carbon dioxide stream is further cooled and partially condensed in a carbon dioxide purification unit to form a carbon dioxide product stream. Excess refrigeration duty from the carbon dioxide purification unit is used to cool the carbon dioxide feed stream.
    Type: Application
    Filed: July 1, 2022
    Publication date: January 4, 2024
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Paul Higginbotham, Dingjun Wu, Gowri Krishnamurthy, Todd M. Moyle, Michelle Roaf, Mozhgan Alimohammadi Zanjani
  • Carbon Dioxide Capture
    Publication number: 20240001283
    Abstract: A method for capturing carbon dioxide from a carbon dioxide feed stream in which the carbon dioxide feed stream is dehydrated, cooled, and partially condensed. The partially condensed carbon dioxide stream is separated to form the carbon dioxide product stream. The carbon dioxide feed stream is produced by combusting a fuel stream with an oxygen-enriched gas stream with less than 92% purity.
    Type: Application
    Filed: July 1, 2022
    Publication date: January 4, 2024
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Todd M. Moyle, Paul Higginbotham, Dingjun Wu, Gowri Krishnamurthy, Michelle Roaf, Christer Haugland