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Table 2.1: Table of adsorbent physical properties and finite element parameters. ns m ∆H bo ρb χ-particle porosity ε-void fraction of packing ε′-total bed voidage k Cps Cp,air Cp,CO2 D feed flow rate air mole fraction in feed CO2 mole fraction in feed feed temperature 4.07 mol/kg sorbent 0.518 41.8 kJ/mol 1.74×105 700 kg/m3 0.5 0.4 0.7 0.135 W/m K 960 kJ/kg K 40.3 J/mol K 29.25 J/mol K 0.05 m2/s 0.02633 m3/s 0.9974 0.0026 298 K We write an overall material balance of the form ρ ∂n+ε′∂c+ε∇(⃗vc)=0 where ρb is the bulk density of the adsorbent, ε and ε′ are the void-fraction of pack- ing and total bed voidage, respectively, and the fluid-phase velocity is described by Darcy’s law2 for packed beds ⃗v = −kd∇P (2.4) We develop a component material balance for CO2 by applying equation 2.3 for a (2.5) (2.6) single component which yields ρ ∂n+ε′∂ci +ε∇(⃗vc)=−ε∇J b∂t∂ti i with the component molar flux described by b ∂t ∂t (2.3) Ji = −cDi∇yi 10PDF Image | TEMPERATURE SWING ADSORPTION COMPRESSION AND MEMBRANE SEPARATIONS
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