1 Performance Metrics for Separation Processes

n_{i,k}^{(F)} = mass or molar flow rate of species i entering separator k in feed stream (mass time-1 or mol time-1)

n_{i,k}^{(1)} = mass or molar flow rate of species i leaving separator k in first product stream (mass time-1 or mol time-1)

n_{i,k}^{(2)} = mass or molar flow rate of species i leaving separator k in second product stream (mass time-1 or mol time-1)

{\rm SF}_{i,k} = split fraction for species i in separator k (dimensionless)

{\rm SR}_{i,k} = split ratio for species i in separator k (dimensionless)

(1.1)   \begin{displaymath} {\rm SF}_{i,k} = n_{i,k}^{(1)}/n_{i,k}^{(F)} \end{displaymath}

(1.2)   \begin{displaymath} {\rm SR}_{i,k} = n_{i,k}^{(1)}/n_{i,k}^{(2)} = {\rm SF}_{i,k}/(1-{\rm SF}_{i,k}) \end{displaymath}

 

Example

For the process below, compute the split fraction and the split ratio for iC5H12.  Designate the overhead stream as product stream 1.

 

License

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Chemical Engineering Separations: A Handbook for Students by Monica H. Lamm and Laura R. Jarboe is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, except where otherwise noted.

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