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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List of Figures 2.1 A composite adsorbent pellet with different mass transfer resistances [156] . . . 14 2.2 Adsorption isotherms and change in equilibrium solid loading with pressure and temperature...................................... 17 2.3 A2-bed4-stepSkarstromcycle[176]........................ 22 2.4 Timechartfora5-bed11-stepH2 PSAprocess[100] . . . . . . . . . . . . . . . 24 2.5 Boundary matchings required for the two-bed four-step PSA process . . . . . . 25 2.6 Approaches to match boundary values while simulating multi-bed PSA operations 26 2.7 Finitevolumediscretizationscheme......................... 30 3.1 A2-bedPSASuperstructure ............................ 37 3.2 Realization of different operating steps by varying control variables . . . . . . . 39 3.3 Realization of 4-step Skarstrom cycle from the superstructure . . . . . . . . . . 39 4.1 OptimalcontrolprofilesforcaseII ......................... 58 4.2 OptimalVSAconfigurationforcaseII ....................... 58 4.3 Gas-phaseCO2 concentrationprofilesforcaseII . . . . . . . . . . . . . . . . . 60 4.4 Purity-recoverytrade-offcurveforcaseII ..................... 62 4.5 OptimalcontrolprofilesforcaseIII......................... 64 4.6 OptimalVSAconfigurationforcaseIII....................... 64 4.7 Gas-phaseCO2 concentrationprofilesforcaseIII . . . . . . . . . . . . . . . . . 65 4.8 Power-recoverytrade-offcurve,at90%CO2 purity . . . . . . . . . . . . . . . . 68 LIST OF FIGURES xii

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