Langmuir isotherm model nonlinear fitting in MS Excel SOLVER
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- Опубліковано 5 жов 2024
- This tutorial is for all who have performed adsorption isotherm experiment and analysing data. This video shows how to fit nonlinear Langmuir isotherm model in MS excel SOLVER!. Nonlinear Langmuir model is better approach than linear ones. This method can be used for fitting any nonlinear equation using MS Excel SOLVER.
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This is the most important video on Langmuir isotherm nonlinear fiting using MS excel Solver!
Helpful and informative.
Thanks to almighty that I was searching for this video for my work, Thank you so much sir for the great explanation
You are most welcome. Please watch all videos of this channel and don't forget to subscribe to this channel.
@@Aminulchem hello sir, can you also plot ficks law of diffusion graph in orgin for the composite materials in comparison with langmuir method
@@muneerahmed9263 Thanks. it can be considered later. Please watch all other videos and don't forget to subscribe to this channel.
@@muneerahmed9263 Thanks. It can be considered later. However, you can try by watching videos on this channel. Please watch all other videos of this channel and don't forget to subscribe to this channel.
Very useful video. I took the help of this video in analysis.
Thanks a lot sir for making very useful and informative videos for the students 🙏🙏🙏
Thanks 💯
Useful video sir! 👍👍👍👍👍
Thanks for your comment. Please like & share this video so that others can watch it.
Good morning sir!
please have a look on following thermodynamics parameters..
Are they correct.
Actually I am a bit confused about the value of G(kj/mol)
In one conc...value of S(j/k mol)
61.207
Value of H(kj/mol) is 19.66
Value of G(kj/mol)
2.502,; 0.9703; -1.098
In second conc..
Value of s is 41.146
Value of H is 14.21
Value of G is 2.64;1.73;1.63
In 3rd concentration
Value of S is 26.45,
Value of s is 14.21
Value of G
2.30;16.61 and 16.97
Please reply me.
Regards
@@anjalisharma314 Thank. The values of s and h seems to be reasonable. DelG for 1st conc is positive & negative which not true. Usually delG value negative for spontaneous adsorption process. So recalculate these.
@@Aminulchem thanks for reply sir!
I will recalculate and will tell you too how I calculated this.
You are on other level Dr 😢😮😢😢😢😮😮😮😮 free service ....
Thanks and appreciated 👍
Highly informative videos of non-linear. Thanks. I done all the part using Solver but Pseudo-first order and Elovich model is not solving and facing the problems.
Langmuir, Freundlich and Temkin model has been done and also pseudo-second order model.
Thanks.Please watch videos several times and then practice.
@@Aminulchem I have done various models but facing pseudo-first order and D-R models.
@@ilmakhan6834 Please try again watching videos.
Good afternoon sir!
I recalculated the thermodynamics values as per your instructions
For 100mg/L, it came= -17.30; -18.22; -18.83
For 200mg/L it came= -11.63; --12.24 and -12.65
For 300mg/L, it came= -7.47; -7.87:and -8.13.
I have recalculated it after seen your video on thermodynamics parameter
Formulas I have seen.
Now please tell whether these values are correct now or I have to recalculated it once again.
Regards!
Thanks. Now the values seem to reasonable.
@@Aminulchemgood evening sir thanks 🙏🙏🙏🙏
@@anjalisharma314 You are welcome.
What is the difference between linear and non-linear?
Thanks. Linear & nonlinear are two forms of writing an adsorption isotherm and kinetic equation.
Very helpful, Thank you very much. Please, from the beginning of the video, how did you already get the Langmuir isotherm in the graph? Need some assistance on how the qe=qm... appeared on the graph.
Thank you so much for your important comment, Daniel. You need to plot qe vs Ce graph at first. Then do fitting. Please watch these videos several times for practice and you will be able to do nice fitting using both origin and MS excel solver: ua-cam.com/users/AminulchemInnovationplaylists?view=50&sort=dd&shelf_id=8
If you have further query, please let me know & don't forget to subscribe this channel.
Thanks, Dr Aminulchem, I would have a look at the videos.
@@danieldodoo7475 glad to know that.
Why the calculation of r2 in this video is using 1- (ASSR/SSR)? As I found that the formula of calculation of r2 in the journal paper was 1-[(qe.exp - qe.calc)^2 / (qe.exp - q mean)^2]? And I compared the r2 value obtained using these two formula, there will be a difference. Can Dr. Aminul show where you obtained the formula of r2 used in this video ?
Thanks. You are right. You can use your given formula. But I have shown here the easiest method to calculate R2. Please check all other videos and don't forget to subscribe.
@@Aminulchem Alright! Thank you too, Dr. Aminul for your meaningful video as well. It is really helpful and informative.
@@ryulim9147 Glad to know that. Please watch videos
@@ryulim9147 Glad to learn that
how to derive partition coefficient from this plot
Thanks. Langmuir constant may be considered as pattion coefficient for thermodynamic parameters calculation
Hi, how do we determine the constants like K and q(m) of Langmuir model if the graph is not linear and its polynomial of 2nd order instead i.e. y =0.0125x^2 - 1.3739x + 30297
Thank you.
Thanks. In this case, you need to fit a nonlinear Langmuir isotherm model watching videos.
sir how can we add the uncertainities in qm and b value
Thanks. In order to get these you need to use origin to fit nonlinear Langmuir equation
Can we solve elovich non linear isotherm by this model?
Thanks. Sure. You can try watching videos of my channel
sir, how you can get k value 0.05 I don't understand kindly reply
how to draw a graph for this sir
Thanks. Using origin pro and following this process.
how to know the value of K, is it fixed (0.05)?
Please reply
Thanks. Initially you need to put a value and optimize it until close to fitting. Then perform solver fitting.
@@Aminulchem On which basis we can optimize the value sir
@@yogiitasharma3409 Just guessing a value
Sir R2 value calculated by this formula differs from the values obtained by graph plotted on origin pro.....
So which value should be considered?
Which R2 value is authentic?
Nonlinear
Nonlinear fitting gives better results
@@Aminulchem sir non linear graphs ki hi value R2 ki diff ati hai origin pro pe aur excel pe jo manually calculate ki hoti
Dono values mai se konsi consider krni chahiye jo origin pro pe ati ya jo khud excel pe calculate ki hoti
Aur kya ye possible hai k R2 ki value diff kry excel aur origin pe jbky baqi constants ki value same ho dono jga pe