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Gas liquid contact in stripping column

  1. Mar 1, 2012 #1
    [itex]\frac{x[Ain]-x[Aout][/SUB][/SUB]}{x[Ain]-x[out][/SUB][/SUB]}[/itex]=[itex]\frac{\sum s^{K}-1}{\sum s^K}[/itex] (1)

    for k = 0 to n

    Final result:

    [itex]\frac{x[Ain]-x[Aout][/SUB][/SUB]}{x[Ain]-x[/SUB][/SUB]}[/itex] = [itex]\frac{{S-S^{n+1}}}{1-S^{n+1}}[/itex]


    Does anyone know how to get from (1) to (2).
  2. jcsd
  3. Mar 1, 2012 #2


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    Welcome to PF!

    Hi RAfAEL_SP! Welcome to PF! :smile:

    (use _ not SUB in latex, and use tex rather than itex for fractions that ou don;t want to be too tiny! :wink:)
    I think you mean [tex]\frac{\sum s^{K-1}}{\sum s^K}[/tex]
    Then eg the denominator is (∑sK)/(1 - S) :wink:
  4. Mar 1, 2012 #3
    The exponent is just k
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