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TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION

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TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION ( temperature-swing-adsorption-processes-for-gas-separation )

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Table 2.7. Comparison of properties of water and PAO (Process Systems Enterprise, 1997-2015; Chevron, 2008) Property , kg m-1s-1 cp, J kg-1 K-1 k, W m-1 K-1 , kg m-3 Pr σ, Å MW, g mole-1 psat, kPa Deff,HTF-CH4, m2 s-1 PAO, 25°C 7.710-3 2208 0.154 808 110 PAO, 100°C 1.910-3 2468 0.143 719 33 Water, 25°C 8.910-4 4180 0.590 997 6.18 Water, 100°C 2.8210-4 4580 0.670 958 1.92 45.0 336 0.133 2.64 18 3.16 1.3710-9 1.0510-7 The full process is simulated with the methodology discussed in the previous sections and the two adsorbent-HTF pairs. Based on the extent of completion of each stage, the stage times for both the scenarios are estimated and listed in Table 2.8 with Figure 2.10 showing the overall cycle performance in terms of the adsorbent capacity for CH4 and CO2. The adsorption, desorption, cooling and purge stages are marked by the numbers 1, 2, 3, and 4, respectively. Figure 2.10. Cyclic CO2 adsorbed concentration with silicalite – water and zeolite 5A – PAO pairs 52

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