Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 - 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ?
Correct answer: A. η = 17 - 61.1 log μ
- A. η = 17 - 61.1 log μ
- B. η = 24.6 (Δp/μ)
- C. η = 1.66 - 0.25 log μ
- D. η = 0.25 log μ - 1.67
Explanation
For the stated viscosity and relative-volatility range, the refinery-column correlation is η = 17 − 61.1 log μ, with η expressed as a percentage. The other expressions either have the wrong form or give unrealistic efficiencies.
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