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column dimensions. This is important to POC design because packaging all the components into a portable process is tricky, and greater flexibility in column dimensions is always desirable. Another potential limitation, adsorbent utilization was also studied. A limit on adsorbent utilization (minimum BSF) is important because it represents the limit on the size and speed of a POC. There is no consensus currently on why a minimum BSF occurs. A minimum BSF was experimentally found for a two-column small scale PSA process for the first time in this study. The reason a minimum BSF occurred in this work was proposed to be due to macropore diffusional resistance. 7.5. Future Work The primary recommendation for future work is to vary particle size for each of the studies in this dissertation. Currently in literature for small LiLSX particles, a nitrogen MTC has been measured as a function of temperature, pressure, and velocity (this study). Understanding how the MTC varies as a function of particle size is the last variable needed to develop a generalized correlation for LiLSX particles. Shrinking particle size may also increase pressure drop enough such that it impacts the minimum BSF. Furthermore, running a small scale process with a different particle size would help confirm that macropore diffusional resistance causes the minimum BSF. Other possible future work includes measuring a minimum BSF with larger diameter columns (more representative of industrial small scale systems) and demonstrating how the estimation of the axial dispersion coefficient affects process simulation results. 140PDF Image | LIMITS OF SMALL SCALE PRESSURE SWING ADSORPTION
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