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US 12,398,844 B2Granted
Method and system for processing biogas
AssigneeIogen Corporation
InventorsBrian Foody, Patrick J. Foody, Jeffrey S. Tolan
Life of this patent
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Abstract
A method of processing biogas that includes obtaining a mobile tank containing biogas at a pressure greater than 1000 psig, connecting the mobile tank to a pressure let down system, and depressurizing the mobile tank to remove biogas therein. The depressurization includes removing gas from the mobile tank using the pressure let down system, and introducing a warming gas into the mobile tank.
Claims21
A method of processing biogas comprising:
- providing a mobile tank containing biogas at an initial pressure, said initial pressure greater than 1000 psig, said biogas being raw biogas or partially purified biogas and comprising carbon dioxide and methane;
- connecting the mobile tank containing biogas to a pressure let down system;
- and
- depressurizing the mobile tank from the initial pressure to a final pressure while avoiding a phase change to liquid and/or solid within the mobile tank, said depressurizing comprising:
- a) removing gas from the mobile tank using the pressure let down system;
- and
- b) introducing a warming gas into the mobile tank,
- wherein depressurizing the mobile tank from the initial pressure to the final pressure comprises removing at least half of the biogas by mass initially present in the mobile tank before introducing the warming gas into the mobile tank.
5 more elements
A method of processing biogas comprising:
- providing a mobile tank containing biogas at an initial pressure, said initial pressure greater than 1000 psig, said biogas being raw biogas or partially purified biogas and comprising carbon dioxide and methane;
- connecting the mobile tank containing biogas to a pressure let down system;
- feeding biogas in the mobile tank to the pressure let down system;
- reducing the pressure in the mobile tank from the initial pressure to a final pressure using the pressure let down system while avoiding a phase change to liquid and/or solid within the mobile tank, the phase change avoided by maintaining a temperature within the mobile tank within a predetermined range as the pressure is reduced to the final pressure by introducing a warming gas into the mobile tank, wherein at least half of the biogas by mass initially present in the mobile tank is removed before introducing the warming gas;
- and,
- feeding a gas stream comprising the biogas removed from the mobile tank to a biogas upgrading system, a fuel production system, or a combination thereof.
3 more elements
A method of producing a fuel from biogas comprising:
- filling a mobile tank with biogas to a first pressure, said biogas comprising raw biogas or partially purified biogas from a first source;
- transporting the mobile tank containing the biogas;
- unloading the transported biogas from the mobile tank;
- and
- producing upgraded biogas, a fuel, or a combination thereof from the unloaded biogas,
- wherein unloading the transported biogas from the mobile tank comprises avoiding a phase change to liquid and/or solid within the mobile tank and comprises removing a mixture comprising the biogas from the first source and biogas from a second other source, where the biogas from the second other source is raw biogas or partially purified biogas introduced into the mobile tank during said unloading, and wherein at least half of the biogas by mass initially present in the mobile tank is removed before introducing the biogas from the second other source.
3 more elements
Dependencies are inferred from the claim text.