PT-Flash
Detailed App Info:
Application Description
PT-Flash App!
Save lots of time on VLE calculations!
Based on "Introduction to Chemical Egineering Thermodynamics - Seventh Edition, J.M. Smith & H.C. Van Ness & M.M. Abbott - Chapter 14 (chapter 12 on 4th edition) - Vapor-Liquid Equilibria - LOW TO MODERATE PRESSURES.
This app runs Bubble P, Dew P, Bubble T, Dew T and P, T -Flash calculations blocks (Vapor - Liquid equilibria - VLE)!
Constant R = 8.31451 J / (K * mol)
As a default you will find blanks filled for 2 chemicals and error level of 0.001.
The first step is to input Antoine A, B and C for saturation pressure calculation.
Antoine equation written as:
ln(Psat) = A - (B / (T + C))
If you have 2 chemicals, you will input 2 A, 2 B and 2 C! type in each of them (on their especific text fields) and press + to add. Or press - to delete the last value of the array.
Choose Temperature (K or oC) and Pressure units (kPa, atm or bar).
Now go to Calcs tab.
There you will enter Temperature and or Pressure, x(i), y(i) or z(i).
The two last text fields are model dependent.
Virial model for fugacity coeff (Ø - phi). You can have n chemicals:
B(ij) input only: n of chemicals, nˆ2 of B(ij). Enter B(ij) for virial in (dmˆ3 / mol)!
The calculations will run considering it equals to 1! At low to moderate pressures it introduces just little error!
The number beside the text field indicates the number of data on that especific array.
Wilson model for activity coeff (gamma):
selecting this model you will be asked to inform a(ij) and V(i).
For Wilson model you can have n chemicals!
a(ij) input: n of chemicals, nˆ2 of a(ij). Enter a(ij) for Wilson in (J / mol)!
V(i) input: n chemicals, n V(i). V(1) + V(2) +... V(n) +
V(i) usualy in cmˆ3 / mol.
Margules model for activity coeff (gamma):
selecting this model you will be asked to inform A12 and A21 only (binary systems ONLY).
INPUT: A12 + A21 + (that simple). A12 and A21 are dimensionless!
van Laar model for activity coeff (gamma):
selecting this model you will be asked to inform A'12 and A'21 only (binary systems ONLY).
INPUT: A'12 + A'21 + (that simple). A'12 and A'21 are dimensionless!
NRTL model for activity coeff (gamma):
selecting this model you will be asked to inform b12, b21 and alpha! (binary systems ONLY).
INPUT: b12 + b21 + (that simple). b12 and b21 in (J / mol)!
alpha is a single value and is dimensionless!
All those hard tasks done, you just tap the desired calculation (Bubl P, dew P, Bubl T, Dew T or PT Flash)!!
After that you will have a report showing informed datas and the main results before and after iterations.
Or you will have a issues report telling you what info was missed!
I really hope it might help you a lot on your job or Thermodynamics classes!!
Last Tips:
- use dots (.) for decimals
- read the Help inside the App!
- the guys beside text fields are supposed to be friendly and keep you informed of the number of items on a specific array (according to model choice or for Antoine data or x(i), y(i) and z(i))!! Watch out for them! :-)
Enjoy!
Contact:
paulorsouto1@gmail.com
Save lots of time on VLE calculations!
Based on "Introduction to Chemical Egineering Thermodynamics - Seventh Edition, J.M. Smith & H.C. Van Ness & M.M. Abbott - Chapter 14 (chapter 12 on 4th edition) - Vapor-Liquid Equilibria - LOW TO MODERATE PRESSURES.
This app runs Bubble P, Dew P, Bubble T, Dew T and P, T -Flash calculations blocks (Vapor - Liquid equilibria - VLE)!
Constant R = 8.31451 J / (K * mol)
As a default you will find blanks filled for 2 chemicals and error level of 0.001.
The first step is to input Antoine A, B and C for saturation pressure calculation.
Antoine equation written as:
ln(Psat) = A - (B / (T + C))
If you have 2 chemicals, you will input 2 A, 2 B and 2 C! type in each of them (on their especific text fields) and press + to add. Or press - to delete the last value of the array.
Choose Temperature (K or oC) and Pressure units (kPa, atm or bar).
Now go to Calcs tab.
There you will enter Temperature and or Pressure, x(i), y(i) or z(i).
The two last text fields are model dependent.
Virial model for fugacity coeff (Ø - phi). You can have n chemicals:
B(ij) input only: n of chemicals, nˆ2 of B(ij). Enter B(ij) for virial in (dmˆ3 / mol)!
The calculations will run considering it equals to 1! At low to moderate pressures it introduces just little error!
The number beside the text field indicates the number of data on that especific array.
Wilson model for activity coeff (gamma):
selecting this model you will be asked to inform a(ij) and V(i).
For Wilson model you can have n chemicals!
a(ij) input: n of chemicals, nˆ2 of a(ij). Enter a(ij) for Wilson in (J / mol)!
V(i) input: n chemicals, n V(i). V(1) + V(2) +... V(n) +
V(i) usualy in cmˆ3 / mol.
Margules model for activity coeff (gamma):
selecting this model you will be asked to inform A12 and A21 only (binary systems ONLY).
INPUT: A12 + A21 + (that simple). A12 and A21 are dimensionless!
van Laar model for activity coeff (gamma):
selecting this model you will be asked to inform A'12 and A'21 only (binary systems ONLY).
INPUT: A'12 + A'21 + (that simple). A'12 and A'21 are dimensionless!
NRTL model for activity coeff (gamma):
selecting this model you will be asked to inform b12, b21 and alpha! (binary systems ONLY).
INPUT: b12 + b21 + (that simple). b12 and b21 in (J / mol)!
alpha is a single value and is dimensionless!
All those hard tasks done, you just tap the desired calculation (Bubl P, dew P, Bubl T, Dew T or PT Flash)!!
After that you will have a report showing informed datas and the main results before and after iterations.
Or you will have a issues report telling you what info was missed!
I really hope it might help you a lot on your job or Thermodynamics classes!!
Last Tips:
- use dots (.) for decimals
- read the Help inside the App!
- the guys beside text fields are supposed to be friendly and keep you informed of the number of items on a specific array (according to model choice or for Antoine data or x(i), y(i) and z(i))!! Watch out for them! :-)
Enjoy!
Contact:
paulorsouto1@gmail.com
Requirements
Your mobile device must have at least 275.84 KB of space to download and install PT-Flash app. PT-Flash is available on iTunes for $2.99
If you have any problems with installation or in-app purchase, found bugs, questions, comments about this application, you can visit the official website of PAULO RENATO SOUTO at http://twitter.com/paulorsouto.
Copyright © 2013 Paulo Souto
