Page 183 - Pressure Swing Adsorption
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158                                   PRESSURE SWJNG ADSORPTION                  EQUILIBRIUM THEORY                                           159
                                                                                                             2 ~~'7


                                                  q*=lO;  k=l
               p         0.01                                                                            V)
                                                                                                         Q)
                                                                                                         ~
             (atm)                                                                                       :J
                                                                                                         "'
                    4                                                                                    "'
                                                                                                         Q)
                                                                                                         ~
                                                                                                         Q.
                                                                                                         "'                                  p
                                                                                                         ~  1
                                                 e                                                       c                                   b
                                                                                                         0
                                                                                                         .cii
                    2                                                                                    C                                      j
                                                                                                         Q)
                                                                                                         E
                                                                                                         0                                   a
                                             15.0
                    0 L....-~--'--~--'--~--'--~--'--_.-__,                                                   O ~~~~~~1~--'--'~~--'--'~2
                    0.0       0.2        0.4       0.6       0.8       1.0
                                                                   X                                                           TJ

                                           (a)                                                                               ial



                  1.0 .----------------------,
                                                                                                        <J)
                  o.s L----__::..:.:~----                          1                                    ~          p
                                                                                                        Q)
                                            15.0
                                                                                                        :,
                                                                                                        <J)
                                               e                                                        <J)
                                                                                                        Q)
                                                                                                        0.
                  0.8                       ~                                                           <J)        b
                                         2.4                                                           ~  0.5
                                                                                                        C
                                                                                                        0
                  0,7                                                                                  ·;;;
                      t  _____ l.O                                                                      C
                                                                                                        Q)
                                        -------1                                                       E
                   0.6                                                                                 0
                                                                                                                   a
                                                                                                             0 ~-'-L..L.--'--'~.L....L-'-L..L.--'--'~.L....L-'--LJ
                                                                                                                                1               2
                              0.2        0.4       0.6       0.8       1.0
                                                                    X                                                          TJ
                                           (/>)                                                                              (I>)
            Figure 4.25  TheoretJcai  profiles of-(a)  reduced  total  pressure  and (b) mole  fraction   Figure 4.26  Theoretical  profiles  of total  pressure  ( fJ ),  mofo  fraction  of 0.,  ( a)  and
            of the more strOngly adsorbed component (yA) during blowdown of an  adsorbent 1,ed.   mole  fraction  of  N 2  (b)  durmg  pressunzat1on  and  hlowdown  of  a  5A  zeOlite  bed
            l\1 ""5  utm,  PL= 1 atm,  Yo= 0.5,  K = W  (linear  isotherm),  O = dimensionless  lime.   equilibrated  with  air,  calculated  from  the  analytic  solution,  (From  Scott,:i 11  with
            (From Lu ct al., 35   with  perm1ss1on.)                                         permission.)
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