๐ผ Multicomponent Distillation (FUG)
Shortcut sizing of multicomponent distillation columns using Fenske minimum stages, Underwood minimum reflux root-finding, Gilliland actual stages, and Kirkbride feed stage location.
โก Fortran 90 Engine
Double Precision (IEEE 754)
โ ISO / ASME Validated
Mass Transfer
๐ Solver Telemetry
โ ACTIVE
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16
โก Solves
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๐พ Downloads
395
๐ฆ Fortran Code
6.4 KB
๐
Released
Jun 2026
โฑ๏ธ Latency
< 1 ms
๐งช Industrial Distillation Column Internal Reflux & Reboiler Simulation
Real-time visual simulation of vapor boilup, liquid reflux trays, feed injection & product split๐ Configuration & Presets
๐ข๏ธ Benzene-Toluene (ฮฑ=2.45)
๐ฅ Depropanizer LPG (ฮฑ=2.10)
๐ท Bio-Ethanol Column
โก NGL Debutanizer (ฮฑ=2.80)
FUG Short-Cut Formulations:
โข Fenske: Nmin = ln[ (xD,LK/xD,HK) / (xB,LK/xB,HK) ] / ln ฮฑ
โข Underwood: ฮฃ [ (ฮฑi zF,i) / (ฮฑi โ ฮธ) ] = 1 โ q
โข Gilliland: Y = (N โ Nmin) / (N + 1) vs X = (R โ Rmin) / (R + 1)
โข Kirkbride: log(Nrect / Nstrip) = 0.206 log [ (zHK/zLK) (xB,LK/xD,HK)ยฒ (B/D) ]
โข Fenske: Nmin = ln[ (xD,LK/xD,HK) / (xB,LK/xB,HK) ] / ln ฮฑ
โข Underwood: ฮฃ [ (ฮฑi zF,i) / (ฮฑi โ ฮธ) ] = 1 โ q
โข Gilliland: Y = (N โ Nmin) / (N + 1) vs X = (R โ Rmin) / (R + 1)
โข Kirkbride: log(Nrect / Nstrip) = 0.206 log [ (zHK/zLK) (xB,LK/xD,HK)ยฒ (B/D) ]
๐ Column Sizing Results
Configure inputs and click Compute to view results.
๐ Calculation Methodology & FUG Standards
Fenske-Underwood-Gilliland Sequence
The classic short-cut distillation method provides rapid, high-accuracy preliminary column sizing prior to rigorous tray-by-tray equilibrium simulation.
Reflux Optimization Trade-Off
As operating reflux $R$ approaches $R_{min}$, required stages $N \to \infty$. As $R \to \infty$, $N \to N_{min}$ but reboiler energy explodes. The economic optimum lies between $1.15 R_{min}$ and $1.40 R_{min}$.
Key Engineering Assumptions
- Constant molar overflow (CMO) along rectifying and stripping sections.
- Constant average relative volatility across the column temperature profile.
- Kirkbride equation for optimum feed stage entry.