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US 10,760,024 B2Granted
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
A method for upgrading biogas comprising:
- (a) obtaining biogas from a plurality of biogas sources, including a first biogas from a first biogas source and a second other biogas from a second other biogas source;
- (b) removing one or more components from the first biogas to produce a first partially purified biogas having a non-methane content of at least 10%, said one or more components comprising hydrogen sulfide, carbon dioxide, or a combination thereof, said one or more components removed using at least one stationary purification system;
- (c) transporting a first vessel containing the first partially purified biogas from the first biogas source directly to a biogas upgrading facility;
- (d) removing one or more components from the second biogas to produce a second partially purified biogas, said one or more components comprising hydrogen sulfide, carbon dioxide, or a combination thereof, said one or more components removed using at least one stationary purification system;
- (e) transporting a second vessel containing the second partially purified biogas from the second biogas source directly to the biogas upgrading facility;
- (f) at the biogas upgrading facility, removing at least one component from a gas stream comprising the first partially purified biogas, the second partially purified biogas, or a combination thereof, to produce renewable natural gas having a heating value that is greater than a heating value of any one of the first and second partially purified biogases;
- (g) providing the renewable natural gas produced in f) for injection into a distribution system, for use as a transportation fuel, or for a combination thereof.
4 more elements
A method for upgrading biogas comprising:
- (a) obtaining biogas from a plurality of biogas sources, including a first biogas from a first biogas source and a second other biogas from a second other biogas source;
- (b) feeding the first biogas into a first stationary purification system to remove hydrogen sulfide, carbon dioxide, or a combination thereof from the first biogas and produce a first partially purified biogas having a heating value that does not exceed 900 BTU/scf;
- (c) transporting a first vessel containing the first partially purified biogas from the first biogas source directly to a biogas upgrading facility by vehicle;
- (d) feeding the second biogas into a second other stationary purification system to remove hydrogen sulfide, carbon dioxide, or a combination thereof from the second biogas and produce a second partially purified biogas having a heating value that does not exceed 900 BTU/scf;
- (e) transporting a second vessel containing the second partially purified biogas from the second biogas source directly to the biogas upgrading facility by vehicle;
- (f) at the biogas upgrading facility, feeding the first and second partially purified biogases into one or more purification systems to remove carbon dioxide, nitrogen, oxygen, or any combination thereof and to produce renewable natural gas having a heating value that is at least 950 BTU/scf;
- (g) providing renewable natural gas produced in f) for injection into a distribution system, for use as a transportation fuel, or for a combination thereof.
4 more elements
Dependencies are inferred from the claim text.