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8.22: Untitled Page 211

  • Page ID
    18344
  • Chapter 8

    is different than ( m

    ) , Eq. 8‐47 is still correct, but our interpretation of  n is cell 1

    1

    not correct. Consider the case, ( m

    )  m

    , and develop a new version of

    cell 1

    cell

    Eq. 8‐47 in which the incoming flux of cells is interpreted properly in terms of the number of cells per unit volume in the incoming stream.

    8‐18. Develop a general solution for Eqs. 8‐54 and consider the behavior of the system for D   , D   and D   .

    Section 8.5

    8‐19. Repeat the analysis of binary batch distillation when Raoult’s law is applicable, i.e., the process equilibrium relation is given by

      x

    eff

    A

    y

    A exit

    1   x  

    A eff

    1

    Here 

    is the effective relative volatility and is temperature dependent; eff

    however, in this problem you may assume that 

    is constant. Use your result

    eff

    to construct figures comparable to Figure 8‐12 for o

    x  0 1

    . and o

    x  0 5

    . with

    A

    A

    values of 

    given by 1 / 4 , 1 / 2 , 1, 2, and 4.

    eff