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increases, the model over-predicts the adsorption time; nevertheless, the results are within the uncertainty range of the experimental values. The ΔT validation, however, does not yield a close agreement, due to not only fixed values of ε and MF for all the data points, but also local variations in ΔT magnitudes in a single reading. Figure 4.2 and Figure 4.8 show that temperatures increase quickly with nearly similar slopes; however, the magnitudes of temperature peaks are different. This local variation is attributed to uneven distribution of adsorbent particles axially and circumferentially, as well as local variations of the adsorbent layer void fraction. The model can only assume an adsorbent layer of constant thickness with constant packing properties; therefore, ΔT predictions with the model are nearly similar for all axial locations for a combination of ΔP and L as shown in Figure 4.8 and the predicted ΔT is usually greater than the observed ΔT. Nevertheless, it can be inferred that the qualitative trends of heat and mass transfer results from the models match the corresponding measured trends, with a reasonable accuracy agreement in adsorption time. 131PDF Image | TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION
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