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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species. The resistance to heat transfer from the adsorbent layer to the fused silica is calculated using Equation (2.10), in which the conduction heat transfer resistance in the adsorbent layer and that in the fused silica are added (Pahinkar et al., 2015). 2.2.1.4 lnRhth lnRFS,mid  R  Rth Req,FS   w,mid   h  (2.10) 2kw 2kFS Governing equations for the fused silica The adsorbent layer considered in the present simulation is attached to the fused silica monolith wall. Although the fused silica wall is impermeable to species, the thermal mass of fused silica participates in heat transfer with the adsorbent layer. The energy equation used for the fused silica wall is shown in Equation (2.11), which is coupled with the energy equation for the adsorbent layer shown in Equation (2.9). The thermo-physical properties of fused silica used in Equation (2.11) are listed in Table 2.1. T 2T T T  c FS k FS  w FS (2.11) FS p,FS t FS z2 AFS Req,Heat,FS 2.2.1.5 Boundary conditions for the adsorbent layer The adsorbent layer is assumed to be insulated at the inlet and outlet headers to improve computational stability of the model in presence of changing boundary conditions for the microchannel. The boundary conditions for the species and energy balances can then be identified as shown in Equation (2.12) and (2.13). D Cw,i eff ,i z  D eff ,i Cw,i z  0 (2.12) z0 zL 27

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