Patents by Inventor Marie Shirai

Marie Shirai 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).

  • Carbon dioxide production system
    Patent number: 11581559
    Abstract: A carbon dioxide production system 10A includes: a fuel cell stack 16; a separation unit 20 that separates anode off-gas into a non-fuel gas including at least carbon dioxide and water and a regenerative fuel gas; a second heat exchanger 32 that separates water from the non-fuel gas; a water tank 42; and a carbon dioxide recovery tank 48 that recovers the carbon dioxide after the water has been separated.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: February 14, 2023
    Assignee: TOKYO GAS CO., LTD.
    Inventors: Tatsuya Nakajima, Tatsuki Dohkoh, Marie Shirai
  • Fuel Cell System and Method of Reprocessing Off-Gas
    Publication number: 20210399321
    Abstract: A fuel cell system including a fuel cell, an off-gas reprocessing unit that is provided downstream of the fuel cell and that at least partially removes at least one of steam or carbon dioxide from an off-gas discharged from the fuel cell, a flow passage that is provided downstream of the off-gas reprocessing unit and that allows a reprocessed off-gas discharged from the off-gas reprocessing unit to flow therethrough, and a controlling unit that modulates the reaction constant Kpa of a reaction A with respect to the reprocessed off-gas discharged from the off-gas reprocessing unit, to 1.22 or more.
    Type: Application
    Filed: October 28, 2019
    Publication date: December 23, 2021
    Inventors: Kazuo NAKAMURA, Takahiro IDE, Tatsuya NAKAJIMA, Toru HATAE, Tatsuki DOHKOH, Marie SHIRAI, Shunnosuke AKABANE
  • CARBON DIOXIDE PRODUCTION SYSTEM
    Publication number: 20210036351
    Abstract: A carbon dioxide production system 10A includes: a fuel cell stack 16; a separation unit 20 that separates anode off-gas into a non-fuel gas including at least carbon dioxide and water and a regenerative fuel gas; a second heat exchanger 32 that separates water from the non-fuel gas; a water tank 42; and a carbon dioxide recovery tank 48 that recovers the carbon dioxide after the water has been separated.
    Type: Application
    Filed: January 24, 2019
    Publication date: February 4, 2021
    Inventors: Tatsuya Nakajima, Tatsuki Dohkoh, Marie Shirai