Method of utilizing a methane-containing biogas
AssigneeG.A.S. Energietechnologie GmbH
InventorsRobert Rautenbach, Suleyman Yuce, Joachim Gebel, Alexander Schmitt
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Abstract
In a method of utilizing a methane-containing biogas by feeding the methane-containing biogas to a gas engine of a gas engine/generator assembly generating electricity, the steps of passing the biogas through a membrane separating installation to divide the biogas into a first gas stream having a higher methane content than the biogas fed thereto and a second gas stream enriched in CO2, feeding the first gas stream to the gas engine as fuel, and returning the second gas stream to the source of the biogas.
Claims5
A method of utilizing a methane-containing biogas containing less than 40%, by volume, of methane by feeding the methane-containing biogas to a gas engine of a gas engine/generator assembly generating electricity, comprising the steps of
- (a) passing the biogas through a membrane separating installation to divide the biogas into a first gas stream having a higher methane content than the biogas fed thereto and a second gas stream enriched in CO2,
- (b) feeding the first gas stream to the gas engine as fuel and operating the gas engine with an air ratio λ=1.5 to 1.8, and
- (c) returning the second gas stream to the source of the biogas.
A method of utilizing a methane-containing biogas by feeding the methane-containing biogas to a gas engine of a gas engine/generator assembly generating electricity, comprising the steps of
- (a) passing the biogas through a membrane separating installation to divide the biogas into a first gas stream having a higher methane content than the biogas fed thereto and a second gas stream enriched in CO2,
- (b) feeding the first gas stream to the gas engine as fuel, and
- (c) heating the second gas stream with waste heat produced by the gas engine and returning it to the source of the biogas.
A method of utilizing a methane-containing biogas by feeding the methane-containing biogas to a gas engine of a gas engine/generator assembly generating electricity, comprising the steps of
- (a) passing the biogas through a membrane separating installation to divide the biogas into a first gas stream having a higher methane content that the biogas fed thereto and a second gas stream enriched in CO2,
- (b) feeding the first gas stream to the gas engine as fuel, and
- (c) humidifying the second gas stream with water and returning it to the source of the biogas.
Dependencies are inferred from the claim text.