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US 2025/0352943 A1Published application
Method and system for upgrading biogas
AssigneeIogen Corporation
InventorsPatrick J. Foody, John Dechman
Life of this patent
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Abstract
A method for providing renewable natural gas (RNG) includes removing hydrogen sulfide and/or carbon dioxide from biogas to provide partially purified biogas, which may be stored in a mobile storage tank. The partially purified biogas is transported to a biogas upgrading facility, at least partially by truck, rail, or ship. At the biogas upgrading facility, the partially purified biogas is further purified to provide the RNG, which can be injected into a distribution system (e.g., natural gas grid) and/or provided for use in transportation.
Claims22
1-45. (canceled)
A method of upgrading biogas comprising:
- a) providing a centralized biogas upgrading system for upgrading biogas in a plurality of stages, the plurality of stages comprising a carbon dioxide removal stage and a nitrogen removal stage;
- b) receiving biogas from a plurality of biogas sources, the biogas comprising a first biogas and a second other biogas, wherein at least the first biogas is partially purified biogas produced from a process that comprises removing water, hydrogen sulfide, carbon dioxide, or any combination thereof from raw biogas, the first biogas transported to the centralized biogas upgrading system in a mobile storage system pressurized to at least 1000 psig,
- c) introducing the first biogas into the centralized biogas upgrading system at one stage and introducing the second biogas into the centralized biogas upgrading system at another stage;
- and
- d) producing upgraded biogas from at least some of the biogas from the plurality of sources.
2 more elements
Dependencies are inferred from the claim text.