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CHAPTER VII CONCLUSIONS AND RECOMMENDATIONS The work presented in this dissertation considers the use of temperature swing adsorption in the capture and compression of CO2 from a feed stream using a bed of 5A zeolite, the importance of uniform heating within a TSA bed and the impact nonuniform heating has on desorption equilibria within the bed, the development of a perturbation solution to describe breakthrough behavior in fixed-bed adsorption for a nonplug flow described by a constant pattern, the modeling of experimental data for a shell and tube Nafion⃝R multi-tube membrane module with a vacuum on the shell side in lieu of a purge stream, and the effects of scale on the operation of a shell and tube Nafion⃝R multi-tube membrane module under counter-current operation. The principle findings of this research are: Temperature Swing Adsorption Compression • The minimum total volume of a two-stage TSA compressor is closely related to the equilibration pressure of the two stages. • Initiating an adsorption half-cycle in a TSA bed immediately following des- orption has a negative impact on performance and will blow any adsorbate accumulated in the fluid phase out of the bed. • The value of the effective thermal conductivity has a significant impact on the performance of a TSA bed, and efforts can be made to increase a TSA bed’s effective thermal conductivity through careful examination of the geometry. • Imbalanced heating loads of a TSA bed negatively affects the bed’s performance, therefore proper control of the energy supplied to the bed during desorption ensuring an even distribution throughout. 130PDF Image | TEMPERATURE SWING ADSORPTION COMPRESSION AND MEMBRANE SEPARATIONS
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