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ALPINE SKI HOUSE
DistillationProcess SimulationAgung Ari WibowoDept. Of Chemical EngineeringPoliteknik Negeri Malang
ALPINE SKI HOUSE
WHAT IS DISTILLATION?
Separation process based on Vapor-LiquidEquilibrium (VLE) of separated component. Inmulticomponent distillation, each componenthas Binary Interaction Parameter (BIP) dependon the thermodynamics model used in thecalculation
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VLE OF EACH TRAY/ STAGE
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• Each Tray have specificP and T.
• Mol Fraction of Vaporand Liquid are different.
• Upper tray are rich ofVolatile compound.
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Flash and Multiple Stage
Flash Tank Distillation Column
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SHORT CUT DISTILLATION
First pass estimate on the performance
requirements of a given system for a
specified reflux ratio.
To assist the user when setting up the
complete distillation utility in HYSYS (e.g.
number of trays, feed location, etc.)
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Shortcut
Rigorous
30%
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SHORT CUT DISTILLATION
Data Result
The vapor/liquid quality of the top productFully specified distillate product stream (temperature,
pressure, flow rate, composition)
The light key component and composition in the bottoms
product
Fully specified bottom product stream (temperature,
pressure, flow rate, composition)
The heavy key component and composition in the distillate
(top) product
Condenser operating temperature and heat duty
Reboiler operating temperature and heat duty
The condenser pressure
The reboiler pressure
The external reflux ratio
Minimum number of trays (calculated by Fenske Methode)
Actual number of trays (minimum/theoritical tray devided by
tray efficiency)
Optimum feed tray location
Reflux minimum (Calculated by Underwood Methode)
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SHORT CUT DISTILLATION
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Heavy key : a heavier component means acomponent with a higher boiling point.Defined as heaviest component in theoverhead product in a significantamount.
Light Key : a lighter component means acomponent with a lower boiling point.Defined as lightest component in thebottom product in a significant amount
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EXAMPLE
The column operate isobarically and
R=1.18 Rm. What is the composition
of the product (top and bottom), and
what is the temperature of reboiler
(Use Peng-Robinson as Fluid
Package)?
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Feed Mole Fraction
Benzene 0.35
Toluene 0.25
p-xylene 0.40
20°C and 1 atm 500 kg/hr
Benzene 99.9% ;Toluene
Benzene 0.1%.
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SHORT CUT DISTILLATION
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Ethyl benzene is produced by the reaction of ethylene and benzene. The reactor which being used has the maximum
conversion of 80% and operated adiabatically. The feed of the reactor consist of pure ethylene, benzene and recycle
stream from Flash Separator. The product from the reactor is cooled to 64 C, and then flash separated. The bottom
product of the Flash Separator will be separated using distillation column to get high purity E-benzene. If the column
bottom product only consist of Benzene and E-benzene in which the mole fraction of benzene is 0.1% and in the Top
product the mole fraction of E-Benzene is 0.01%, determine in which stage feed should enter the column? Column
operated isobarically.C2H4 + C6H6 → C8H10
Component Feed Benzene Feed Ethylene
Temperature (C) 25 25
Pressure (atm) 1 1
Molar Flow (kmol/hr) 500 450
Fluid Package (Peng-Robinson)
R = 1.26 Rm Distillate Phase : Vapor
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Proses Flow Diagram
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1000 kmol/h25 C101.3 kPa
220 CdP = 10 kPa P = 2000 kPa
298 C
20 C
100 kPa
71.3 C dP = 0 kPa
LK : EtAc (0.001%)HK : EtOH (18%)Cond Press: 100kPaReboil Press: 100 kPaR = 2 Rm
LK : Acetaldeyhide (0.001%)HK : EtOH (0.001%)Cond Press: 120kPaReboil Press: 140 kPaR = 2 Rm
Pembuatan Ethyl Acetate
Rx 1: 2EtOH → 1 Ethyl Acetate + 2 H2Rx 2: EtOH → Acetaldehyde + H2
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Pembuatan Benzene dan Styrene
Rate Unit : kmol/m3 s
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LK : Benzene (0.1%)HK : Styrene (0.1%)Cond Press: 200 kPaReboil Press: 210 kPaR = 2 Rm
E-Benzene10000 kg/h25 C100 kPa
200 kPa136 C
250 C
300C
260 C50 C
Pembuatan Benzene dan Styrene
V = 7 m3D = 1 mNumber of Tube = 9dP = Ergun Eq
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MTBE is made commercially by catalytic reaction between methanol and i-butylene at 110 C. A widely used
catalyst is an acidic ion exchange resin. A mixture of fresh and recycled methanol is mixed with a C4 stream
and a mixture of fresh and recycled sulfuric acid, and reacted at elevated temperature and pressure in two
sets of multistage, the heated reactors in vapor phase. Most of H2SO4 is then separated in the settler and
recycled to reaction.
- Fluid Package : PSRV
- Use equilibrium reaction and reactor, reaction in vapor phase
- Stream 1 : i-butene (C4H8), 450 kmol/hr; 30 oC; 500 kPa
- Stream 2 : Methanol ; 400 kmol/hr; 30 oC; 101.3 kPa
- H2SO4 : 10 kmol/hr; 30 oC; 500 kPa
- Stream 3 : 500 kPa
- Stream 5 : 100 oC
- Stream 9 : 110 oC
- Stream 10 : 100 oC
- Stream 13 : 95 oC
- Stream 14 : 150 oC
- Stream 19 : 100 oC
- T-100 : Distilate in vapor phase; LK (i-butene) = 0.000001 ; HK
(Methanol) = 0.000001 ; P Condenser = 180 kPa; P Reboiler = 210
kPa; R = 1.5 Rm
- Pressure drop in all HE are neglected
- Purge = 0.7* H2SO4 Recycle
MTBE Process with H2SO4 Catalyst
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MTBE Process with H2SO4 Catalyst
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PEMBUATAN METANOL DARI SYNGAS
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90 kmol/h25 C120 kPa
90 kmol/h25 C120 kPa
120 C119.9 kPa
25 C119.8 kPa
LK : Toluene (1%)HK : E –Benzene (1%)Cond Press: 110 kPaReboil Press: 120 kPaR = 1.1 Rm
LK : E –Benzene (1%)HK : Styrene (1%)Cond Press: 110 kPaReboil Press: 130 kPaR = 2 Rm
LK : MeOH (0.001%)HK : H2O (1%)Cond Press: 120 kPaReboil Press: 180 kPaR = 1.13 Rm
112.5 C109.9 kPa120 kPa
135 kPa
Rx 1: Toluene + MeOH → Styrene + H2O + H2% Conv MeOH = 60%Rx 2: Toluene + MeOH → E-Benzene + H2O% Conv MeOH = 20%
Pembuatan Ethyl Benzene dan Styrene
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THANKYOUwww.chemeng.polinema.ac.id
Agung Ari Wibowo
081235594828
agung.ari [email protected]