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accounting for axial dispersion effects has a significant impact on the mass transfer coefficient estimation, often measured with breakthrough experiments. An important limitation for small scale PSA processes is the limit on adsorbent utilization. Decreasing cycle time for a PSA process typically results in a gain in adsorbent utilization, often represented in industry by the bed size factor (BSF). Increasing adsorbent utilization is represented by a decrease in BSF. A low BSF is desirable because it represents a smaller overall process size, which is highly attractive for portable systems. Currently, there is no consensus in literature if a lower limit for the BSF exists and what may cause it. In this study, a two column small scale PSA process was used to measure the cycle time of a minimum BSF. It represents the first experimental literature example of a minimum BSF for a two column air separation process. The data was then used with a literature model to better understand why the minimum was occurring and what was primarily causing it. It was determined that macropore diffusional resistance is the primary cause of a minimum BSF. vPDF Image | LIMITS OF SMALL SCALE PRESSURE SWING ADSORPTION
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Limits of Small Scale PSA_Aaron Moran.pdfDIY PDF Search: Google It | Yahoo | Bing
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