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Steam reforming with FLUENT?

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Old   October 27, 2006, 00:34
Default Steam reforming with FLUENT?
  #1
Claud
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Hello everybody, has anybody some experience in modelling methane steam reforming with FLUENT? Moreover, I would like to include 3 global reactions (article from Xu 1989) with its kinetical equations. Any suggestions? Thanx for replying! Claud
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Old   October 29, 2006, 23:00
Default Re: Steam reforming with FLUENT?
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smalawi
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Dear Claud,

I'm intersted in steam reforming as well. so far all my work was with process simulators ,e.g Hysys, and i would like to expand to cfd as well. most of my cfd work is not reaction based and will aprecaite it if you could share your finidngs on steam reforming with me.

thanks for your time,

regards

sm
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Old   October 30, 2006, 09:24
Default Re: Steam reforming with FLUENT?
  #3
Mathis
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Just write a UDF that modifies the reaction rates (either volume or surface) and hook the UDF to the fluent solver.

It works...

Good luck
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Old   November 1, 2006, 02:14
Default Re: Steam reforming with FLUENT?
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Claud
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Hi Mathis, do you have an exact example for that UDF? Do you also work on steam reforming? I am highly interested since I want to model a part of an autothermal gasifyier. If you have a good example (since I have no experience in writing own UDFs) could you please contact me again so that we could exchange some information. Thanks a lot for your help! Claud
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Old   November 1, 2006, 06:27
Default Re: Steam reforming with FLUENT?
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Mathis
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Hi Claud,

I can recommend you to look in the Fluent UDF Guide under the model dependant define macro "DEFINE_VR_RATE", there you can find some examples you can build your work on.

Mathis
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Old   November 1, 2006, 09:29
Default Re: Steam reforming with FLUENT?
  #6
RoM
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Fluent does support power law kinectics. Is there any need to write an udf?
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Old   November 2, 2006, 02:40
Default Re: Steam reforming with FLUENT?
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Claud
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Hi RoM,

from my point of view it is necessary to write an own UDF since the kinetical equations are not that simple and I can only include simple kinetics in FLUENT (I have reaction rate equations including different partial pressures and the k-values, see "Methane Steam Reforming, Methanation and Water-Gas Shift: I. Intrinsic Kinetics" by Xu1989). So at the moment I am trying to figure out how UDF works in general. If you have any suggestions regarding that topic I would appreciate your answer.

Thanx.

Claud

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Old   November 2, 2006, 03:12
Default Re: Steam reforming with FLUENT?
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Frederik
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Hi Claud,

Claud what is your deadline - if I get time I can try to make a small PDF guide... of some of my work?

Mathis
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Old   November 2, 2006, 04:01
Default Re: Steam reforming with FLUENT?
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Claud
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Hi Mathis,

thanks for your offer. It sounds like you are also working on this kind of topic or what is your research field? And regarding the deadline: as always "the sooner the better". For steam reforming processes I have done some modelling with Cantera/MATLAB in a plug flow reactor. Therefore, I think it would be interesting to implement the kinetics into FLUENT as a next step. At the institute we try to model an ATR gasifyier with FLUENT and up to now only the gas phase is working quite well but the heterogeneous reactions are not included up to now.

Thanx again. Claud
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Old   November 2, 2006, 04:07
Default Re: Steam reforming with FLUENT?
  #10
RoM
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Unfortunalty i dont have the paper you mentioned. If you can send me a link or pdf copy i will take a look at it.

Depending on your model you need different macros for an udf. If you reaction mechanism is straight forward like natural gas combustion you can use "finite rate/eddy dissipation" as a reation model and a DEFINE_VR_RATE macro to define the reaction rates.

Since steam reforming reactions include CO-H2O shift you will probably want to account for the CO-H2O equlibirium. In this this case "finite rate/eddy dissipation" will produce poor results and its better to use EDC instead. EDC wont work with DEFINE_VR_VRATE, you will need DEFINE_NET_REACTION_RATE in this case.

RoM
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Old   November 2, 2006, 04:32
Default Re: Steam reforming with FLUENT?
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Mathis
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Hi Claud,

I have been modelling ethanol/methane steam reforming by use of Fluent - trying to improve a reactor for hydrogen production, so i'm pretty sure that you can get some inspiration from that.

I'll try to cook up a PDF for you, maybe in the weekend.

Is that ok?

Mathis
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Old   November 2, 2006, 04:36
Default Re: Steam reforming with FLUENT?
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Claud
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Hi Mathis,

thanks a lot for your help and hopefully your inspiration (maybe even with an example?)! The weekend is fine for me.

Claud
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Old   November 6, 2006, 02:25
Default Re: Steam reforming with FLUENT?
  #13
Mathis
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Where should I send it?
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Old   November 23, 2006, 19:22
Default Re: Implementation of Xu_Froment_kinetics?
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Trembly
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Does anyone have some idea for how to incorporate complex kinetic rates(instead of the simple Arrhenius rate expression as in FLUENT)?

In view of the complexity of the kinetic model from Xu_Froment, I would like some comments on its implemenation in Fluent.

Thanks in advance!

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Old   March 19, 2009, 16:38
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  #15
zpq
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Quote:
Originally Posted by Mathis
;136827
Where should I send it?
It is a very old post. And I can not find the author of the post anymore.

Does anyone still have the UDF example for this steam reforming? Please contact me, thanks a lot!

zpq
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Old   April 9, 2009, 07:40
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Ananda
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Quote:
Originally Posted by Mathis
;136713
Hi Claud,

I have been modelling ethanol/methane steam reforming by use of Fluent - trying to improve a reactor for hydrogen production, so i'm pretty sure that you can get some inspiration from that.

I'll try to cook up a PDF for you, maybe in the weekend.

Is that ok?

Mathis

Can you pls. send me the PDF on the steam methane reformation using UDF
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Old   May 5, 2009, 03:41
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Quote:
Originally Posted by anandats View Post
Can you pls. send me the PDF on the steam methane reformation using UDF


Could anyone send me the PDF file as well.
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Old   May 5, 2009, 11:00
Smile Me too (I am in a bad need for it)
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Moatazbellah Mahmoud Mousa
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Could someone send it to me, I am in a bad need for it in my research.
my e-mail:- moataz.che@gmail.com

Thanks in advance for your help and cooperation, wishing I can help you as soon as I get a chance.
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Old   May 8, 2009, 11:48
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R. Roy
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dear sirs,

if you have got the pdf, i would be thankful if you can send to me as well.

thanking you

sincerely.
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Old   May 8, 2009, 12:11
Default please help
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ibrahim
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Could anyone kindly send an example of udf for steam reforming here.
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