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Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Tutorial 4 - Question Q1 Solution
a) Define the light key (LK) and heavy key (HK) components.
F = 2000 kmol/h
XMET = 0.18
XETH = 0.32
X = 0.26
Xa=0.24
! RETH = 95%
+
F = 2000 kmol/h
XMET= 0.18
XETH = 0.32
XP = 0.26
X8 = 0.24
B
Rop=98%
Assumptions:
F = 2000 kmol/h
XMET = 0.18
XETH = 0.32
XP = 0.26
X₂8 = 0.24
100% recovery of methanol in D
100% recovery of n-butanol in B
Tutorial 4 - Question Q1 Solution
The composition of D and B is
controlled by the separation of
ethanol and n-propanol.
VolatiliyETH > Volatiliy
Light key = ethanol
Heavy key = n-propanol
b) Determine the outgoing compositions for all the components.
DMET=RMET, D(F-XMET) = (F-XMET)
DETH = RETH D(FXETH)
Dop=(1-RPB)(F-XnP)
Doa Rua D(FX) = 0
1
Mass balance of every component
y compa
applied to the whole column
BMET=RMET, B(F-XMET) = 0
BETH=(1-RETH, D) (F-XETH)
B₂P=R₂PB(F*XP)
BBR-B, (F-X₂B) = (F-X₂B)
Tutorial 4 - Question Q1 Solution
b) Determine the outgoing compositions for all the components.
DMET= 2000-0.18 = 360 kmol/h
DETH = 0.95(2000-0.32) = 608 kmol/h
Dp = 0.02(2000-0.26) 10.4 kmol/h
Doa = 0 kmol/h
University of
Strathclyde
BMET=0 kmol/h
ВМЕТ
BETH = 0.05(2000-0.32) = 32 kmol/h
Bp=0.98(2000-0.26) = 509.6 kmol/h
BB= 2000-0.24 = 480 kmol/h
*
University of
Strathclyde
University of
Strathclyde
XUET = 0.37
XETH = 0.62
X₁P = 0.01
X₁8 = 0
XMET = 0
XETH = 0.03
XP = 0.50
X-8 = 0.47
Transcribed Image Text:3 Tutorial 4 - Question Q1 Solution a) Define the light key (LK) and heavy key (HK) components. F = 2000 kmol/h XMET = 0.18 XETH = 0.32 X = 0.26 Xa=0.24 ! RETH = 95% + F = 2000 kmol/h XMET= 0.18 XETH = 0.32 XP = 0.26 X8 = 0.24 B Rop=98% Assumptions: F = 2000 kmol/h XMET = 0.18 XETH = 0.32 XP = 0.26 X₂8 = 0.24 100% recovery of methanol in D 100% recovery of n-butanol in B Tutorial 4 - Question Q1 Solution The composition of D and B is controlled by the separation of ethanol and n-propanol. VolatiliyETH > Volatiliy Light key = ethanol Heavy key = n-propanol b) Determine the outgoing compositions for all the components. DMET=RMET, D(F-XMET) = (F-XMET) DETH = RETH D(FXETH) Dop=(1-RPB)(F-XnP) Doa Rua D(FX) = 0 1 Mass balance of every component y compa applied to the whole column BMET=RMET, B(F-XMET) = 0 BETH=(1-RETH, D) (F-XETH) B₂P=R₂PB(F*XP) BBR-B, (F-X₂B) = (F-X₂B) Tutorial 4 - Question Q1 Solution b) Determine the outgoing compositions for all the components. DMET= 2000-0.18 = 360 kmol/h DETH = 0.95(2000-0.32) = 608 kmol/h Dp = 0.02(2000-0.26) 10.4 kmol/h Doa = 0 kmol/h University of Strathclyde BMET=0 kmol/h ВМЕТ BETH = 0.05(2000-0.32) = 32 kmol/h Bp=0.98(2000-0.26) = 509.6 kmol/h BB= 2000-0.24 = 480 kmol/h * University of Strathclyde University of Strathclyde XUET = 0.37 XETH = 0.62 X₁P = 0.01 X₁8 = 0 XMET = 0 XETH = 0.03 XP = 0.50 X-8 = 0.47
Multicomponent Flash Distillation
A mixture of methanol (1), ethanol (2), n-propanol (3) and n-butanol (4) is fed into
a distillation column. The feed flow rate is 2000 kmol/h and its mole composition
is given in the table below. The goal is to achieve 95% recovery of ethanol in the
distillate and 98% recovery of n-propanol in the bottoms.
a) Define the light key (LK) and heavy key (HK) components.
b) Determine the outgoing compositions for all the components.
Assumption: methanol and n-butanol are only present in the distillate and bottom
streams, respectively
Component
z
methanol (1)
0.18
ethanol (2)
0.32
n-propanol (3)
0.26
n-butanol (4) 0.24
Transcribed Image Text:Multicomponent Flash Distillation A mixture of methanol (1), ethanol (2), n-propanol (3) and n-butanol (4) is fed into a distillation column. The feed flow rate is 2000 kmol/h and its mole composition is given in the table below. The goal is to achieve 95% recovery of ethanol in the distillate and 98% recovery of n-propanol in the bottoms. a) Define the light key (LK) and heavy key (HK) components. b) Determine the outgoing compositions for all the components. Assumption: methanol and n-butanol are only present in the distillate and bottom streams, respectively Component z methanol (1) 0.18 ethanol (2) 0.32 n-propanol (3) 0.26 n-butanol (4) 0.24
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