Method for producing biomethane by purifying biogas from non-hazardous waste storage facilities and facility for implementing the method
US10905995B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 10, 2016 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | Jul 16, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for producing biomethane by purifying biogas from non-hazardous waste storage facilities involves compressing the initial gas flow, introducing the gas flow to be purified into at least one adsorber loaded with adsorbents capable of reversibly adsorbing the VOCs, and subjecting the VOC-depleted gas flow to at least one membrane separation step in order to partially separate the CO2 and O2 from the gas flow. The method also involves 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, and recovering the CH4-rich flow from the cryogenic separation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.