PRINCE, Guénaël,LEFEBVRE, Mathieu,BRIEND, Pierre,PAGET, Nicolas
申请号：
WO2016FR52937
公开号：
WO2017109305(A1)
申请日:
2016.11.10
申请国别(地区):
世界知识产权组织国际局
年份:
2017
代理人:
摘要：
A method for producing biomethane by purifying biogas from non-hazardous waste storage facilities which involves: - compressing the initial gas flow, -introducing the flow of gas to be purified into at least one adsorber loaded with adsorbents capable of reversibly adsorbing the VOCs, - subjecting the VOC-depleted gas flow exiting the adsorber loaded with adsorbents capable of reversibly adsorbing the VOCs to at least one membrane separation step in order to partially separate the CO2 and O2 from the gas flow, - introducing the retentate from the membrane separation step into at least one adsorber loaded with adsorbents capable of reversibly adsorbing the major portion of the remaining CO2, - subjecting the CO2-depleted gas flow exiting the adsorber loaded with adsorbents capable of reversibly adsorbing the major portion of the remaining CO2 to a cryogenic separation step in a distillation column in order to separate the O2 and N2 from the gas flow, - recovering the CH4-rich flow from the cryogenic separation
