Energy Efficiency of Gas Separation Pressure Swing Adsorption

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Energy Efficiency of Gas Separation Pressure Swing Adsorption ( energy-efficiency-gas-separation-pressure-swing-adsorption )

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We can now calculate the number of moles that leave the bed and enter the withdrawal piston by mtegrating the flow out of the bed. a N w = \'Bu (t)%-eAdt+\,'au (t)-%-eAdt ^ w Jo ]lK/RT ih RT Where: Nw = moles of gas purged from the adsorbent bed during the purge step {mol} This expression can be integrated by substimting in Equation (3.41), the appropriate equations for yi(t) (Equation (3.39) or (3.40)), tB (Equation (3.38)), and tpu (Equation (3.29)): N'=jfcjH(l-i>)y> +1 ] <3 43> Calculating Nw by mole balance, as mentioned earlier, provides the relative number of heavy and light moles that leave the adsorbent bed: Where: NWA= number of moles of species A in the purged gas {mol} NWB= number of moles of species J3 in the purged gas {mol} N _ >>BPL S V B (3.44) iyWA~ RT /}, 61

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