TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION

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TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION ( temperature-swing-adsorption-processes-for-gas-separation )

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The adsorption experiments are then repeated for a range of imposed ΔP from 5 kPa to 55 kPa and L from 1 m to 4 m, and the adsorption times and the average and the maximum ΔT for each of the readings are noted. The summary of the adsorption experiments with the PLOT columns is shown in Figure 4.4. Figure 4.4(a) shows the variation of adsorption time with ΔP for L ranging from 1 to 4 m. Each of the clusters has 10 points, as the experiments are repeated ten times for each combination of ΔP and L. As shown in Figure 4.4(a), as the ΔP across the microchannel increases for a given L, the time required to saturate the PLOT column adsorbent decreases. Additionally, for the same ΔP, an increase in L delays the saturation of the adsorbent, which again is in accordance with the expected pattern. Figure 4.4(b) shows the average ΔT as a function of ΔP. As the ΔP across the PLOT column increases for a value of L, the average ΔT during adsorption increases slightly. This increase is due to the marginal increase in the capacity of the adsorbent with an increase in partial pressure. This observation is also demonstrated in the ΔT vs. adsorption time graph shown in Figure 4.4(c). From the clusters of data points representing one test condition, it can be seen that as the adsorption time increases, the average ΔT increases, indicating increased adsorbent capacity. However, no pattern confirming the interdependence of L and ΔT can be discerned. 112

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