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estimate DL is higher than the usual value of 0.7. More data at lower gas velocities is necessary to confirm this value as demonstrated by the large standard error. However, the γ1 estimation was not of great concern in this study, as it only has a small effect on the MTC estimation and is primarily important at very low gas velocities not applicable to PSA systems. More importantly, the results confirm γ2 is an order of magnitude higher than the often used 0.5 value. The experimental value of 3.2 is similar to what was predicted by the literature correlation in equation 4.3 for the particle size used in this study. Finally, the estimate of τp for nitrogen is consistent with most X-type zeolites and studies of larger LiLSX particles cited in section 4.1.4. Since these particles have been manufactured to be rate enhanced for small scale processes, it is not surprising the value is on the lower end of what has been previously reported in literature for larger particles. Figure 6.3 uses the parameters for γ2 and τp found from the van Deemter analysis to reconstruct the predictions from the earlier case study. The literature value of 0.7 was used to estimate γ1 since the data collected did not reach a low enough velocity to achieve a reliable estimate using the van Deemter analysis. It is evident from the figure that the experimental data is still best described by either the case 3 or case 4 prediction. Furthermore, these predictions are now closer to the experimental values than those in the original case study. 107PDF Image | LIMITS OF SMALL SCALE PRESSURE SWING ADSORPTION
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