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Design and Operation of Pressure Swing Adsorption Processes

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Design and Operation of Pressure Swing Adsorption Processes ( design-and-operation-pressure-swing-adsorption-processes )

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5.1 OptimalcontrolprofilesforcaseI.......................... 79 5.2 OptimalVSAconfigurationforcaseI........................ 80 5.3 Gas-phaseCO2concentrationprofilesforcaseI.................. 82 5.4 Purity-recoverytrade-offcurveforcaseI...................... 85 5.5 OptimalcontrolprofilesforcaseII ......................... 87 5.6 OptimalVSAconfigurationforcaseII ....................... 88 5.7 Gas-phaseCO2 concentrationprofilesforcaseII . . . . . . . . . . . . . . . . . 89 5.8 Power-recovery trade-off curve at 90% CO2 purity for case II . . . . . . . . . . 92 6.1 Comparison of original profile and ROM profiles for Burgers equation for varying subspacedimension.................................. 109 6.2 First six POD basis functions of methane mole fraction for adsorption . . . . . 119 6.3 Singular values of gas-phase mole fraction of methane and temperature . . . . . 120 6.4 Comparison of methane mole fraction for all the steps after CSS . . . . . . . . 121 6.5 Comparison of temperature profiles for all the steps after CSS . . . . . . . . . . 122 6.6 Comparison of methane mole fraction profile for adsorption step obtained after integrating in MATLAB and solving simultaneously in AMPL . . . . . . . . . . 123 6.7 Comparison of mole fraction of methane after optimizing Case I . . . . . . . . . 127 6.8 Gas-phase methane mole fraction profiles for ROM for relaxed bounds in Case I 129 6.9 Comparison of mole fraction of methane after optimizing Case II . . . . . . . . 131 6.10 Methane mole fraction profiles for ROM for relaxed bounds in Case II . . . . . 132 7.1 First six POD basis functions of CO2 mole fraction for adsorption . . . . . . . 153 7.2 Singular values of mole fraction of CO2 and superficial gas velocity . . . . . . . 154 7.3 Comparison of CO2 mole fraction for all the steps at the starting guess . . . . . 155 7.4 Comparison of CO2 mole fraction for penalty TR algorithm with FOC . . . . . 161 7.5 Afilterwithfour(θ,f)-pairs ............................ 165 7.6 Comparison of CO2 mole fraction for hybrid filter TR algorithm . . . . . . . . 182 LIST OF FIGURES LIST OF FIGURES xiii

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