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Figure 4.5. Lab scale model architecture 4.4.1 Adsorbent-coated microchannel equations While the adsorbent-coated microchannel simulated in the adsorption stage model uses the exact dimensions of the PLOT columns used for adsorption experiments (530 μm diameter, 30 μm adsorbent layer thickness, and variable L), a few considerations are necessary for conceptualizing the adsorption process in PLOT columns. The composite matrix approach used by Pahinkar et al. (2015) can be used for modeling adsorption in PLOT columns; however, the binder used for holding the adsorbent onto the inner surface of the fused silica cover needs to be differentiated from the glassy polymer, PEI selected by Pahinkar et al. (2015). The adsorbent-binder matrix used in the present work is zeolite 5A- silica. The overall material properties of the adsorbent layer are estimated using appropriate weighted averages discussed by Pahinkar et al. (2015). The additional adsorbent layer properties, the adsorbent layer void fraction (ε) and adsorbent loading (ratio of adsorbent mass to binder mass, MF) are important to predict the breakthrough time and ΔT. However, these properties are proprietary to the manufacturer and must be estimated using a combined test-modeling approach, illustrated in later sections. The values of other parameters and material properties used for the simulation are given in 116PDF Image | TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION
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