Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the_________________?
Correct answer: C. Relative volatility is close to one (e.g., separation of close boiling isomers)
- A. Number of equilibrium stages in only stripping section is to be calculated
- B. Feed is not at its bubble point
- C. Relative volatility is close to one (e.g., separation of close boiling isomers)
- D. Number of equilibrium stages required is likely to be very small
Explanation
Smoker’s equation is useful for binary distillation when the relative volatility is close to unity, as in close-boiling mixtures. Such separations require many stages, making ordinary simplified stage calculations less convenient.
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