Method and device for conditioning biogas in compact form

Abstract

The invention relates to a method (100) for conditioning biogas in compact form, the method comprising: a step (105) of receiving a biogas stream comprising at least methane; a step (110) of measuring a flowrate of biogas at the inlet; a step (115) of injecting a carbon dioxide stream into the biogas stream as a function of the measured flowrate, configured so that the fraction of carbon dioxide represents between 40% and 56% of the molar mass of the mixture comprising at least carbon dioxide and methane; a step (120) of compressing the mixture to a pressure higher than or equal to 80 bara; a step (125) of cooling the compressed mixture to a temperature of between −50° C. and 5° C. to bring the mixture to a liquid or supercritical state; and a step (130) of releasing the mixture.

Dependencies are inferred from the claim text.