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lnRw,mid 1R RMass,i h (4.10) hm Peri 2 Di,eff ,total The dual-site Langmuir (DSL) equation is used for calculating the competitive adsorption isotherms for N2 and CO2 in the zeolite 5A adsorbent crystals as shown in Equation (4.11) along with temperature dependence shown in Equations (4.12) through (4.15) . Helium is assumed to be non-interacting with zeolite 5A. Auxiliary parameters and coefficients used in the DSL equations are listed in Table 4.3 (Gholami and Talaie, 2009). (4.11) (4.12) (4.13) (4.14) (4.15) BPDP CMiiMii A,Eq,i ads B,i 1B P D,i 1 D P ii ii ii B b expQB,i i 0i RT w D d expQd,i i 0i RT w 1,i MAA B,i T 2,i w 3,i MAA D,i T 4,i w To model the microporous diffusion and account for intra-crystalline diffusivity, the LDF constant shown in Equation (4.16) is used. Intra-crystalline diffusivity of the gases in the adsorbent is a function of activation energy and adsorbent layer temperature and can be determined using Equation (4.17). The constant, KLDF, is then used in Equation (4.18) to determine the instantaneous rate of adsorption. The heat of adsorption 121PDF Image | TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION
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