Download presentation

Presentation is loading. Please wait.

1
**ITK-234 Termodinamika Teknik Kimia II**

VLE Calculations for Nonideal Mixtures Dicky Dermawan

2
**Modified Raoult’s Law K-value Method VLE using Equation of States**

Dicky Dermawan

3
**Modified Raoult’s Law:**

Incorporation of fugacity and activity coefficient to vle criteria results: where However, at low pressure (up to at least 1 bar): The Poynting Factor 1 Modified Raoult’s Law:

4
**Modified Raoult’s Law: Wilson Equation for calculating **

Prepare a P-x-y diagram at 80oC Prepare a t-x-y diagram at 101,33 kPa

5
**Modified Raoult’s Law: Wilson Equation for calculating (Cont’)**

Use your diagram to answer there questions: Given P = 70 kPa, T = 80oC & overall composition, z1=30% Find the fraction of system which is liquid (L) & vapor (V) and their respective compositions xi & yi

6
**Modified Raoult’s Law: Wilson Equation for calculating **

Prepare a P-x-y diagram at 80oC Prepare a t-x-y diagram at 101,33 kPa

7
**Modified Raoult’s Law: Wilson Equation for calculating (Cont’)**

Use your diagram to answer there questions:

8
**Modified Raoult’s Law: Wilson Equation for calculating **

9
**Modified Raoult’s Law: Wilson Equation for calculating **

10
**Modified Raoult’s Law: Wilson Equation for calculating **

11
**Modified Raoult’s Law: Wilson Equation for calculating **

12
**Modified Raoult’s Law: Wilson Equation for calculating **

13
**Modified Raoult’s Law: Wilson Equation for calculating **

14
**Modified Raoult’s Law: Wilson Equation for calculating **

15
**Modified Raoult’s Law: Wilson Equation for calculating **

16
**Modified Raoult’s Law: NRTL Equation for calculating **

Prepare a P-x-y diagram at 80oC Prepare a t-x-y diagram at 101,33 kPa

17
**Modified Raoult’s Law: NRTL Equation for calculating **

18
**VLE Calculation Using No Diagram**

Answer the questions (a) through (e) from 12.6 to but don’t use the phase diagram to obtain the answers

19
**Estimating Azeotrophic Condition, Use No Diagram**

20
**K-Value Method: Using De Priester Charts for light hidrocarbons**

The nomographs K = f(T,P) prepared by De Priester provide easy application of this approach to practical problem

21
**K-Value Method: Using De Priester Charts for light hidrocarbons**

High Temperature Range

22
**K-Value Method: Using De Priester Charts for light hidrocarbons**

Low Temperature Range

23
**Type of Phase Equilibria Calculations**

BUBL P calculation: Given T & liquid composition xi, Find the bubble point Pb & vapor composition DEW P calculation: Given T & vapor composition yi, Assume P, find Ki satisfying: Assume P, find Ki satisfying:

24
**Type of Phase Equilibria Calculations**

BUBL t calculation: Given P & liquid composition xi, Find the bubble point Pb & vapor composition DEW t calculation: Given P & vapor composition yi, Assume t, find Ki satisfying: Assume t, find Ki satisfying:

25
**K-Value Method: Using De Priester Charts for light hidrocarbons**

26
**K-Value Method: Using De Priester Charts for light hidrocarbons**

27
**Type of Phase Equilibria Calculations**

FLASH calculation: Given P, T & overall composition, Find the fraction of system which is liquid (L) & vapor (V) and their respective compositions xi & yi Make sure P located between Pb dan Pd, i.e. Perform BUBL P for zi =xi and Perform DEW P for zi = yi Find Ki ; assume V satisfying: or: or: The General Solution Procedure

28
**K-Value Method: Using De Priester Charts for light hidrocarbons**

29
**K-Value Method: Using De Priester Charts for light hidrocarbons**

30
**K-Value Method: Using De Priester Charts for light hidrocarbons**

Similar presentations

Presentation is loading. Please wait....

OK

Pure Component VLE in Terms of Fugacity

Pure Component VLE in Terms of Fugacity

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google