6332Chemical EngineeringMedium
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)?
Aη = 0.25 log μ – 1.67
Bη = 1.66 – 0.25 log μ
Cη = 24.6 (Δp/μ)
Dη = 17 – 61.1 log μ
Correct answer
D. η = 17 – 61.1 log μ
Explanation
The correct answer is η = 17 – 61.1 log μ.