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Landfill Gas Energy Technologies

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Landfill Gas Energy Technologies ( landfill-gas-energy-technologies )

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been used in landfill gas processing. An overview of these processing methods is shown in the table 11. Table 11. Overview of CO2 removal processes. Separation Method Adsorption Functioning Principle Adsorption of CO2 a molecular sieve Final Content Methane Process Pressure Adsorption Swing One of the most widely used adsorption techniques is the Pressure Swing Adsorption (PSA), a classic cyclical process relying on porous materials (molecular sieves) for short-lasting pressure adsorption of selected gases, which are then desorbed in a pressure-relief phase. > 96 Vol.-% Physical absorption Pressurized Water W ash Dissolution of CO2 in water at high pressure > 96 Vol.-% ®- ®- Selexol , Rectisol , ®- Purisol Processes Dissolution of CO2 in a specialized solvent > 96 Vol.-% Chemical absorption Monoethanolamine (MEA) - Wash Chemical reaction of CO2 with MEA > 99 Vol.-% Polymer membrane gas separation (dry) > 80 Vol.-% Membrane separation Source: [40]. Membrane separation (wet) gas Membrane permeability of H2S and CO2 is higher than CH4 > 96 Vol.-% Cryogenic process Low temperature process Phase transformation of CO2 to liquid, while CH4 remains gaseous > 99,9 Vol.-% 2.3.1 Pressure Swing Adsorption (PSA) 70

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