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Ambient temperature (Tw) Isotherm parameters 4.3 Case Setup Table 4.2: Zeolite 13X properties and model parameters [111] Parameter Bulk porosity (εb) Particle diameter (dp) Adsorbent density (ρs) Bulk density (ρb) Heat capacity of solid (Cps ) Heat transfer coefficient (UA) Gas viscosity (μ) Gas constant (R) Mass transfer coefficient (k) Heat of adsorption (∆H ads ) Value 0.34 0.002 m 1870 kg m−3 1234.2 kg m−3 450.54 J kg−1 K−1 926.7 J m−3 sec−1 K−1 1.7857×10−5 kg m−1 sec−1 8.314 J mol−1 K−1 CO2 =0.1631 sec−1 N2=0.2044 sec−1 CO2 =23011.14 J mole−1 N2=14452.72 J mole−1 298 K CO2 k1 2.817269 k21 -3.51×10−4 k31 2.83×10−9 k41 2598.203 k12 3.970888 k2 -4.95×10−3 k32 4.41×10−9 k42 3594.071 4.3 Case Setup N2 1.889581 -2.25×10−4 1.16×10−9 1944.606 1.889581 -2.25×10−4 1.16×10−9 1944.606 We consider an 85%-15% N2-CO2 feed mixture which is a typical composition of a post- combustion flue gas stream. As an initial study, the focus is on a binary feed mixture. A multicomponent feed mixture also having water, oxygen and other trace components will be considered in the future extensions of this work. We assume that the flue gas enters at at- mospheric pressure at a temperature of 310 K, and a maximum velocity (vfeed) of 50 cm/sec. Since the inlet pressure Pinlet is atmospheric, we assume optional inlet compressor is present in the superstructure which compresses inlet gas to pressure Pfeed. Feed pressure Pfeed varies with the case studies. Zeolite 13X is chosen as the adsorbent to separate CO2; Chue et al. [52] suggested it to be a preferable adsorbent over others for this separation system. The adsorbent Chapter 4. Superstructure Case Study: Post-combustion CO2 Capture 53PDF Image | Design and Operation of Pressure Swing Adsorption Processes
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