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We investigated the separation of the CH4/CO2 (54.9%/45.1%) mixture gas from the biogas through the PSA (pressure swing adsorption) experiment and the numerical simulation. To understand the adsorption characteristics of CH4/CO2, the adsorption equilibrium amount of pure gas is measured and the key parameters of the adsorption equilibrium model are determined using the Langmuir isotherm model. A numerical...
The two-step preconcentrator, which performs concentrating volatile organic compounds (VOCs) and removing water vapor from samples, was suggested for the analysis of the exhaled gas of human breath. The suggested two-step preconcentrator consisted of two separate adsorbent stages, and it was operated simply by the serial adsorption/desorption of these two adsorbent stages. By using an additional adsorbent...
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