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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4.3.4 Vacuum Ideal Three-Step Cycle This cycle is the same as that of Figure 4.10, and its Grassman diagram is seen in Figure 4.14. Feed, WF 56,272 J/mol 0 2 (94.22%) Evacuation Work Input, WE2 3452J/mol 02 (5.78%) Total Work Input 59,724 J/mol 0 2 (100%) Evacuation, WEI 28,791 J/mol 0 2 (48.21%) Pressurization, WPR 15,938 J/mol 0 (26.69%) Expanding Product, WR 5177 J / m o l O2 (8.67%) Product Availability, \\ip 3816 J / m o l 0 2 (6.39%) Exhaust Availability, V|/E 502J/molQ2 (0.84%) z Bed Loss 5500 J / m o l O (9.21%) Figure 4.14 Grassman Diagram for the Vacuum Ideal Three-Step Cycle. The Vacuum Ideal Three-Step cycle is seen to require less of a total work input than the Ideal Three-Step cycle in Figure 4.11. Again though, when the energy recovered by the turbines is subtracted from the input work, the same amount of net work is required for both (9818 J/mol 02 ). The three different vacuum cycles are summarized in Table 4.4. 2 119

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