Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

EXAMPLE 5 - 1 We are given the pressure P and the liquid composition x . We want to find the bubble - point temperature

EXAMPLE 5-1 We are given the pressure P and the liquid composition x. We
want to find the bubble-point temperature and the vapor composition as discussed
under "Phase equilibrium" in Sec. 2-2.6. For simplicity let us assume a binary system
of components 1 and 2. Component 1 is the more volatile, and the mole fraction of
1 in the liquid is x and in the vapor is y. Let us assume also that the system is ideal:
Raoult's and Dalton's laws apply.
In liquid:
P1=xP10
P2=(1-x)P20
In vapor:
P1=yP
P2=(1-y)P
124 COMPUTER SIMULATION
B2=2.585
where Pj= partial pressure of j th component
Pj0= vapor pressure of j th component which is a function of temperature T,R
lnP10=A1T+B1
lnP20=A2T+B2
Equating partial pressures in liquid and vapor gives
P=xP10+(1-x)P20
y=xP10P
Our convergence problem is to find the value of temperature T that will satisfy
Eq.(5-4). The procedure is as foilows:
1 Guess a temperature T.
2 Calculate the vapor pressures of components 1 and 2 from Eqs. (5-3).
3 Calculate a total pressure Pcale from Eq.(5-4).
Pcalc=xP10+(1-x)P20
4 Compare Pcalc with the actual total pressure given, P.
5 If Pcalc is greater than P, the guessed temperature was too high and we must
make another guess that is lower.
image text in transcribed

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Introduction To Chemical Engineering Tools For Today And Tomorrow

Authors: Kenneth A. Solen, John N. Harb

5th Edition

0470885726, 978-0470885727

More Books

Students also viewed these Chemical Engineering questions