METHOD FOR PRODUCING BIOMETHANE BY PURIFYING BIOGAS FROM NON-HAZARDOUS WASTE STORAGE FACILITIES AND FACILITY FOR IMPLEMENTING THE METHOD

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 t...

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Bibliographische Detailangaben
Hauptverfasser:	PRINCE, GUENAEL, PAGET, NICOLAS, LEFEBVRE, MATHIEU, BRIEND, PIERRE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL BLASTING CHEMISTRY COMBINED HEATING AND REFRIGERATION SYSTEMS FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS LIQUEFIED PETROLEUM GAS LUBRICANTS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING METALLURGY MIXTURES BY PRESSURE AND COLD TREATMENT NATURAL GAS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRIGERATION OR COOLING SEPARATION SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	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 step. The invention also relates a facility for implementing said method. Procédé de production de biométhane par épuration de biogaz issus d'installations de stockage de déchets non-dangereux (ISDND)selon lequel: -on comprime le flux gazeux initial, -on introduit le flux de gaz à épurer dans au moins un adsorbeur chargé en adsorbants aptes à adsorber réversiblement les COV, -on soumet le flux gazeux appauvri en COV sortant de l'adsorbeur chargé en adsorbants aptes à adsorber réversiblement les COVà au moins une séparation membranaire pour séparer partiellement le CO2 et l'O2 du flux gazeux, -on introduit le rétentat issu de la séparation membranaire dans au moins un adsorbeur chargé en adsorbants aptes à adsorber réversiblement la majeure partie du CO2 restant, -on soumet le flux gazeux appauvri en CO2,sortant de l'adsorbeur chargé en adsorbants aptes à adsorber réversiblement la majeure partie du CO2 restant à une séparation cryogénique dans une colonne de distillation pour séparer l'O2 et l'N2 du flux gazeux, -on récupère le flux riche en CH4 issu de la séparation cryogénique. Installation pour la mise en uvre du procédé