Patents by Inventor Nirupa RAGHAVAN

Nirupa RAGHAVAN 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).

  • Method of liquefying a CO2 contaminated hydrocarbon-containing gas stream
    Patent number: 10871323
    Abstract: The present invention provides a method of liquefying a contaminated hydrocarbon-containing gas stream: (a) providing a CO2 contaminated hydrocarbon-containing gas stream (20); (b) cooling the contaminated hydrocarbon-containing gas stream to obtain a partially liquefied stream (70); (c) separating the partially liquefied stream obtaining a liquid stream (90); (d) cooling the liquid stream (90) in a direct contact heat exchanger (200) obtaining a multiphase stream (201) containing at least a liquid phase and a solid CO2 phase; (e) separating the multiphase stream in a solid-liquid separator (202) obtaining a CO2 depleted liquid stream (141); (f) passing the CO2 depleted liquid stream (141) to a further cooling, pressure reduction and separation stage to generate a further CO2 enriched slurry stream (206); (g) passing at least part of the further CO2 enriched slurry stream (206) to the direct contact heat exchanger (200) to provide cooling duty to and mix with the liquid stream (90).
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: December 22, 2020
    Assignee: SHELL OIL COMPANY
    Inventors: Thijs Groenendijk, Raimo Edwin Gregor Poorte, Nirupa Raghavan, Michiel Gijsbert Van Aken
  • METHOD OF LIQUEFYING A CO2 CONTAMINATED HYDROCARBON-CONTAINING GAS STREAM
    Publication number: 20180347901
    Abstract: The present invention provides a method of liquefying a contaminated hydrocarbon-containing gas stream: (a) providing a CO2 contaminated hydrocarbon-containing gas stream (20); (b) cooling the contaminated hydrocarbon-containing gas stream to obtain a partially liquefied stream (70); (c) separating the partially liquefied stream obtaining a liquid stream (90); (d) cooling the liquid stream (90) in a direct contact heat exchanger (200) obtaining a multiphase stream (201) containing at least a liquid phase and a solid CO2 phase; (e) separating the multiphase stream in a solid-liquid separator (202) obtaining a CO2 depleted liquid stream (141); (f) passing the CO2 depleted liquid stream (141) to a further cooling, pressure reduction and separation stage to generate a further CO2 enriched slurry stream (206); (g) passing at least part of the further CO2 enriched slurry stream (206) to the direct contact heat exchanger (200) to provide cooling duty to and mix with the liquid stream (90).
    Type: Application
    Filed: December 1, 2016
    Publication date: December 6, 2018
    Inventors: Thijs GROENENDIJK, Raimo Edwin Gregor POORTE, Nirupa RAGHAVAN, Michiel Gijsbert VAN AKEN