Operation and Control of Pressure Swing Adsorption Systems

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Operation and Control of Pressure Swing Adsorption Systems ( operation-and-control-pressure-swing-adsorption-systems )

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5.6 Comparison of closed loop controller performance for various op- timal PSA systems and controller settings. ST: Simultaneous ap- proach,SQ:Sequentialapproach................... 131 5.7 Purity response corresponding to the random variations in the ma- nipulativevariable .......................... 134 5.8 Two-dimensional projection of 101 critical region polyhedra corre- sponding to the reduced state space model, [x1, ...x5 = 0, tfeed(k) = u=θ1,(PurityH2 −99.99)×105 =y=θ2,yset =0] . . . . . . . . 135 5.9 Comparison of closed loop performance for the PI and mp-MPC controller ............................... 136 6.1 Variation of CO2 purity and recovery with membrane area for the upstreamconfiguration........................ 145 6.2 Variation of CO2 purity and recovery with membrane area for the downstreamconfiguration ...................... 146 6.3 The hybrid PSA-membrane flow sheet chosen for the optimization studies................................. 150 6.4 Variation of hydrogen recovery with membrane area for the cycle time optimized hybrid PSA-membrane configuration . . . . . . . . 154 6.5 LCA system description for the stand alone PSA separation system 156 6.6 LCA system description for the hybrid PSA-membrane separation system................................. 157 6.7 Variation of CO2 emissions with the membrane area of the hybrid PSA-membraneseparationsystem.................. 158 6.8 Variation of CO and CH4 emissions with the membrane area of the hybridPSA-membraneseparationsystem. . . . . . . . . . . . . . 159 17

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