Operation and Control of Pressure Swing Adsorption Systems

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Operation and Control of Pressure Swing Adsorption Systems ( operation-and-control-pressure-swing-adsorption-systems )

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Chapter 4. Explicit/Multi-Parametric MPC Control of PSA Systems slightly from the details mentioned in Chapter 3 of thesis). Furthermore, the ve- locity dependent terms in the axial heat and mass transfer dispersion coefficients [162, 163] have been neglected. Mass balance (ε +(1−ε)ε)∂Ci +∂UCi +ρ(1−ε)∂Qi =εD ∂2Ci b bp∂t∂zpb∂tbzi∂z2 Energy balance ()() (4.13) (4.14) (4.15) (4.16) (4.17) Ncomp ∂ T∑Ci(Cpi−R) Ncomp ∂ UT∑CpiCi i=1 i=1 ∂t + ∂z Ncomp +ρC 1−εb∂T+ρ1−εb∑∂Qi∆H=λ∂2T p ps εb ∂t p εb i=1 ∂t i ∂z2 Momentum balance ∂P 150μ(1 − ε )2 Ncomp 1.75(1 − εb) ∑ CiMWi b U+ Intraparticle diffusion - LDF model i=1 ε 3b d p − = ∂ z Adsorption isotherm |U|U ε 3b d 3p ∂Qi =KLDFi(Q∗i −Qi) ∂t [ Ncomp ( Q∗i =aiKiCiRT1−∑ Q∗i )]ai Qmax Qmax i i=1i −∆Hi Ki =K∞ieRT Valve characteristics 69

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