Process and system for producing biofuels with reduced carbon intensity
AssigneeIogen Corporation
InventorsPatrick J. Foody, John Dechman
Life of this patent
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Abstract
A process and/or system for producing one or more biofuels, wherein biogas (e.g., partially purified biogas produced by removing water, hydrogen sulfide and/or carbon dioxide from raw biogas) is transported by vehicle in one or mobile vessels. De-pressurization of the mobile vessels provides a change in pressure that can be used to provide work, cooling, and/or increased pressure for the production process. Combustion of the biogas produces heat and/or power used to reduce a carbon intensity of the biofuel or biofuel intermediate.
Claims20
A process for producing biofuel comprising:
- (a) providing biogas from one or more biogas sources, said biogas comprising methane and provided in one or more mobile vessels, each mobile vessel pressurized to at least 2000 psig (13.79 MPa);
- (b) removing and depressurizing biogas from each of the one or more mobile vessels;
- (c) generating heat, power, or a combination thereof, by combusting a gas comprising methane from the biogas removed and depressurized from the one or more mobile vessels;
- and
- (d) producing the biofuel or biofuel intermediate in a production process that includes treating a feedstock, said production process including the use of the heat, power, or a combination thereof, generated in step (c),
- wherein a quantity of biogas used to produce the heat, power, or combination thereof used in step (d) is sufficient to reduce a carbon intensity of the biofuel or biofuel intermediate by at least 5 gCO2e/MJ, and
- wherein a change in pressure provided by the depressurizing in step (b) is used to provide work for the production process, cooling for the production process, increased pressure for the production process, or a combination thereof.
A process for producing one or more biofuels comprising:
- (a) treating a feedstock to produce one or more sugars;
- (b) adding a fermentation organism to a mixture comprising the one or more sugars and fermenting the one or more sugars to produce ethanol;
- (c) recovering the ethanol;
- (d) removing and depressurizing biogas from one or more mobile vessels pressurized to at least 2000 psig (13.79 MPa), said removed and depressurized biogas comprising methane;
- (e) generating heat, power, or a combination thereof from at least a portion of the methane;
- and
- (f) using the heat, power, or combination thereof in step (a), step (b), step (c), or a combination thereof, thereby reducing a carbon intensity of the ethanol,
- wherein depressurizing the biogas in step (d) is conducted so as to provide work for step (a), step (b), step (c), or a combination thereof,
- cooling for step (a), step (b), step (c), or a combination thereof, or any combination thereof.
A process for producing one or more biofuels comprising:
- (a) treating a feedstock to produce one or more sugars;
- (b) adding a fermentation organism to a mixture comprising the one or more sugars and fermenting the one or more sugars to produce ethanol;
- (c) recovering the ethanol;
- (d) removing and depressurizing biogas from one or more mobile vessels having a pressure of at least 2000 psig (13.79 MPa), said removed and depressurized biogas comprising methane;
- (e) generating heat, power, or a combination thereof from at least some of the methane;
- and
- (f) using the heat, power, or combination thereof in step (a), step (b), step (c), or a combination thereof, thereby reducing a carbon intensity of the ethanol,
- wherein said depressurizing comprises providing a pressure drop that cools the removed biogas, and wherein the process comprises providing heat transfer between the cooled biogas and a heat transfer medium and providing cooling for the process with the heat transfer medium.
Dependencies are inferred from the claim text.