TITLE 'Dew Pressure Calculation for the Condenser Pressure' IN-UNITS ENG DEF-STREAMS CONVEN ALL DESCRIPTION " General Simulation with English Units : F, psi, lb/hr, lbmol/hr, Btu/hr, cuft/hr. Property Method: None Flow basis for input: Mole Stream report composition: Mole flow " DATABANKS PURE10 / AQUEOUS / SOLIDS / INORGANIC / & NOASPENPCD PROP-SOURCES PURE10 / AQUEOUS / SOLIDS / INORGANIC COMPONENTS C2 C2H6 / C3 C3H8 / NC4 C4H10-1 FLOWSHEET BLOCK DEW IN=1 OUT=2 3 PROPERTIES RK-SOAVE STREAM 1 SUBSTREAM MIXED TEMP=130. VFRAC=0. MOLE-FLOW=1. MOLE-FRAC C2 0.1327 / C3 0.8451 / NC4 0.0222 BLOCK DEW FLASH2 PARAM TEMP=130. VFRAC=1. TITLE PROJECT=DISTILLATION, PROBLEM=DEWP, USER=JHCHO, DATE=08/28/00 PRINT INPUT=ALL SEQUENCE PROCESS COMPONENT DATA LIBID 1,C2/2,C3/3,NC4 THERMODYNAMIC DATA METHOD SYSTEM=SRK STREAM DATA PROPERTY STREAM=1, TEMPERATURE=100, PRESSURE=300, PHASE=M, & RATE(M)=100, COMPOSITION(M)=1,13.27/2,84.51/3,2.22 UNIT OPERATIONS FLASH UID=F01 FEED 1 PROD V=1V, L=1L DEW TEMP=130 END
Mole Fraction Property Model Methanol in Bottoms Ideal/Raoult's Law 800 ppm RK-Soave 10 ppm NRTL (with BIP's) 152 ppm
Vapor Mole Fraction METHANOL 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.2 0.4 0.6 0.8 1.0 Liquid Mole Fraction METHANOL Vapor Mole Fraction METHANOL 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.2 0.4 0.6 0.8 1.0 Liquid Mole Fraction METHANOL
Vapor Mole Fraction METHANOL 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.2 0.4 0.6 0.8 1.0 Liquid Mole Fraction METHANOL
φ φ φ φ φ φ φ γ
φ γ γ γ γ γ
γ γ Unstable 160 140 120 100 80 A = 0.0 A = 0.5 A = 1.0 A = 2.0 A = 3.0 Pressure (kpa) 60 40 20 0.0 0.2 0.4 0.6 0.8 1.0 x 1, y 1
90 80 Pressure (kpa) 70 60 50 Sub-cooled Liquid positive negative 40 ideal Super-heated Vapor 30 0.0 0.2 0.4 0.6 0.8 1.0 x 1, y 1
φ
Component Methyl Chloride T c (K) 416.3 P c (atm) 65.9 R 0.08206 T (K) 322
ω α
α ω ω α α ω ω
Equation u w Zc van der Waals 0 0 0.3750 Redlich-Kwong 1 0 0.3333 SRK 1 0 0.3333 Peng-Robinson -2-1 0.3074
α α ω ω
Alpha Value for Hydrogen 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 20 40 60 80 100 Reduced Temperature of Hydrogen
4.0 3.8 3.6 Pressure, MPa 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 0.0 0.2 0.4 0.6 0.8 1.0 Mole Fraction of Carbon Dioxide α Soave (1972) α Peng-Robinson (1980) α Soave (1979) α Boston-Mathias (1980) α α Twu (1988) Twu-Bluck-Cunningham (1990)
Porperty Method Equation of State Mixing Rule PRMHV2 Peng-Robinson Huron Vidal PRWS Peng-Robinson Wong Sandler PSRK Peng-Robinson Holderbaum Gmehling RK-ASPEN Redlich-Kwong-Soave Mathias RKSMHV2 Redlich-Kwong-Soave Huron Vidal RKSWS Redlich-Kwong-Soave Wong Sandler SR-POLAR Redlich-Kwong-Soave Schwartzentruber Renon
2 0. Activity of Component 1 1 1 1 1 1 4. 6. 8. 0. 2. 4. 6. 8. 3 4 2 1 0 2. 0. 0 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 1 0. M le o F car n iot o mo Cf nenop 1t
Activity Coefficient of each components 0. 1 9. 8. 7. 6. 5. 4. 3. 2. 1. 0. 0 0 2 4 6 8 01 γ mo C id u iq L sop n ioti x, γ γ
Mixing pure A and B gases Vaporization of liquid A and B into gases Condensation of gaseous mixture into liquid solution Pure A Pure B Directly mixing process Liquid solution A + B
γ γ α α β β β α α β α β
Obtained from Obtained from regression vdw EOS System α β α β Acetaldehyde-water 1.59 1.80 8.05 2.08 Acetone-methanol 0.58 0.56 0.56 0.33 Acetone-water 2.05 1.50 7.86 2.13
Λ γ Λ Λ Λ
τ τ α τ α α γ τ τ τ α
α Mole Percent of Ethanol 0 01 M 02 le o 03 ep 04 necr 05 ot 06 07 eneznebf 08 0 01 02 03 04 05 06 07 08 09 001 Mole Percent of Ethanol 01 0 02 03 04 05 06 07 08 09 001 09 001 0 01 M 02 le o 03 ep 04 necr 05 ot 06 07 eneznebf 08 09 001
Φ θ Φ θ τ τ Φ θ γ γ γ γ Φ θ θ Φ Φ γ θ τ θ τ θ τ
γ
120 118 116 Temperature ( o C ) 114 112 110 108 106 104 102 100 98 0.0 0.2 0.4 0.6 0.8 1.0 Mole Fraction of Water 120 115 Temperature ( o C ) 110 105 100 95 0.0 0.2 0.4 0.6 0.8 1.0 Mole Fraction of Water
4 Liquid Phase Activity Coefficients 3 2 1 0 0.0 0.2 0.4 0.6 0.8 1.0 Mole Fraction of Acetic Acid 2.0 Vapor -phase Fugacity Coefficients 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.2 0.4 0.6 0.8 1.0 Vapor Composition of Acetic Acid
20 Pressure 40 bar 60 80 100 P-xy of ETHANE PROPYLEN 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Mole fraction ETHANE