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LIMITS OF SMALL SCALE PRESSURE SWING ADSORPTION

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LIMITS OF SMALL SCALE PRESSURE SWING ADSORPTION ( limits-small-scale-pressure-swing-adsorption )

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Table 5.10 Cycle specifications for long column cycles with pressure ratio 2.5 in minimum BSF study Production step superficial velocity (cm/s) Feed Press./Production (s) Blowdown (s) Purge (s) 0.7 0.65 0.35 0.3 0.35 0.3 0.45 0.4 Total cycle time (s) 6.4 5.3 3.2 2.6 2.9 2.6 4.4 3.8 Cycle 16 Cycle 17 Cycle 18 Cycle 19 Cycle 20 Cycle 21 Cycle 22 34.5 42.1 70.3 89.4 78.8 89.5 48.9 58.0 1.9 1.5 3.2 2.65 2 1.6 1.25 1.3 1 1.45 1.1 1.3 1 2.2 1.75 Cycle 23 P/F ratio 0.5, product purity: 96% oxygen , production step pressure ~195 kPa, synthetic air 2.5 Table 5.11 Cycle specifications for short column cycles with pressure ratio 3.5 in minimum BSF study Cycle 24 Cycle 25 Cycle 26 Cycle 27 Cycle 28 Cycle 29 Cycle 30 Cycle 31 Cycle 32 Production step superficial velocity (cm/s) 22.6 40.7 49.3 45.4 28.7 33.5 16.4 37.9 42.6 Feed Press./Production (s) 3 1.8 1.55 1.65 2.42 2.1 4.2 1.95 1.75 Blowdown (s) 2.5 1.5 1.25 1.35 2.02 1.75 3.5 1.62 1.45 Purge (s) 0.5 0.3 0.3 0.3 0.4 0.35 0.7 0.33 0.3 Total cycle time (s) 6 3.6 3.1 3.3 4.84 4.2 8.4 3.9 3.5 3.2 Cycle 33 P/F ratio 0.45, product purity: 96% oxygen , production step pressure ~195 kPa, synthetic air 47.8 1.6 1.3 0.3 99

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