Patents Assigned to Airco Process Technology A/S
  • Method for reducing methane emissions from biogas upgrading
    Patent number: 12551841
    Abstract: The present invention relates to a method for upgrading biogas generated by a biological process wherein at least carbon dioxide is removed from the bio-gas. More specifically the present invention relates to method for upgrading a biogas comprising a first absorption step wherein the liquid effluent is subjected to a second absorption step and a flash step and the gas streams resulting therefrom are recycled. The present invention also relates a biogas upgrading plant.
    Type: Grant
    Filed: June 15, 2021
    Date of Patent: February 17, 2026
    Assignee: Airco Process Technology A/S
    Inventor: Rasmus Find
  • Method for recovering methane and carbon dioxide from biogas
    Publication number: 20250205636
    Abstract: The present invention relates to methods for treating biogas to provide an upgraded biogas and a purified carbon dioxide product, combining biogas upgrading processes using physical absorption with a carbon dioxide liquefaction process. The present invention relates to methods for providing a carbon dioxide-rich intermediate from the biogas upgrading process which is suitable for carbon dioxide liquefaction.
    Type: Application
    Filed: March 24, 2023
    Publication date: June 26, 2025
    Applicant: Airco Process Technology A/S
    Inventors: Rasmus Find, Niels Zöga Rytter LARSEN, Jan Flensted POULSEN
  • TWO STEP AMINE ABSORPTION PROCESS FOR REMOVAL CO2/H2S FROM BIOGAS
    Publication number: 20240017205
    Abstract: The present invention relates to a method for upgrading biogas, i.e. a method for removing carbon dioxide and/or hydrogen sulphide from biogas. Particularly the invention relates to a method for upgrading biogas by absorption in two absorbers, where the gas effluent of the first absorber is pressurized and fed to the absorber of the second absorption step and wherein the liquid effluents of the two absorbers are regenerated to form a regenerated absorption stream, which is then provided in two absorption streams which is fed to the absorber of the first and second absorption steps respectively. It also relates to a system for performing the method.
    Type: Application
    Filed: November 16, 2021
    Publication date: January 18, 2024
    Applicant: Airco Process Technology A/S
    Inventor: Rasmus FIND
  • Method for reducing methane emissions from biogas upgrading
    Publication number: 20230271128
    Abstract: The present invention relates to a method for upgrading biogas generated by a biological process wherein at least carbon dioxide is removed from the bio-gas. More specifically the present invention relates to method for upgrading a biogas comprising a first absorption step wherein the liquid effluent is subjected to a second absorption step and a flash step and the gas streams resulting therefrom are recycled. The present invention also relates a biogas upgrading plant.
    Type: Application
    Filed: June 15, 2021
    Publication date: August 31, 2023
    Applicant: Airco Process Technology A/S
    Inventor: Rasmus FIND