Page 247 - Adsorption Technology & Design, Elsevier (1998)
P. 247

224  Selected adsorption processes


                  4.0
                                                           Case  fructose  glucose
                                                            ++   ,,
                        Fructose
                                                          i    2   r7
                                                         iil:
                                                         ;i!    a   o
                                                          ~i',,   4  +
                                                          I!  +
                                         'hi
                                        I
                                                          I   1
                                                          I   t
                                                          ':~
                                        I   '
                                                          !;
                                                          t  I   i
                                       '   l
                                                          I,  I
                                                           t   !
                                       '   I
                  1.0
                                                                  Glucose
                                                           i  I   I
                                      ;   P
                                                           i   I   1
             E
                                      II
            o
                                                           II  ~.4
            o
                                      l;
                                     I;
                                                             ,i/3
             o
                                                             I   !
                                     :,,.,.
                                                             !   !
                                                            ,  i/!   .,  CC
                                     !
                  0.4
                                                             i   i   ]  "
                                                            ;   i   I   /  "
                                       I
                                    I #  :  II  ;
                                    i                       t   t
                                   c~!/\
                                                (fructose)   i  :X
                                   (glucose)
                                   !   !   #
                                   !   !   I
                                                              I  I
                                   !  ," /
                                                               ;  I
                                  'll
                                                               I  I
                                                               I  I
                                  I   !   !
                                               ..   I     I    ti     I   ..
                                        .
                                 I!//  I ..
                                        .
                  0.1
                                                  1 O0   120   140   160
                     0     20    40    60    80
                                                          R
                     0           E            F
                                         Stage number
            Figure  7.17  Profiles for fructose-glucose separation calculated from the steady state
                       countercurrent  (cc) model compared with results calculated by numer-
                       ical simulation at the midpoint of the switch interval for eight (case 1),
                       four (case 2), two (case 3) and one (case 4) columns (source: Hidajat et
                       al. 1986).
             the extract product emerges at a higher concentration  than would otherwise
             be achieved.  Ching et al. (1987) have also investigated systems for which the
             equilibrium relationship  is not linear.
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