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building a multicomponent gas mixture in comsol

Posted 11 juil. 2011, 14:49 UTC−4 Fluid & Heat, Computational Fluid Dynamics (CFD), Chemical Reaction Engineering, Materials, Parameters, Variables, & Functions Version 4.2, Version 4.3a 2 Replies

Nicholas Kennedy
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Hello All,

I was wondering if someone could help me with building a multi-component gas mixture in COMSOL 4.2. I have my biogas composition of 66% CH4, 33% CO2 and 2% H2S and I need to define parameters in comsol for these proportions for modelling gas flowing through water in a bubble column reactor. If anyone could help me with this it would be much appreciated. As of right now, I have CO2 flowing through water with no problem but I need to build a gas mixture and since the bubbly flow interphase only allows for one gas and one liquid I assume I need to build my own material with the proportions listed above. Unfortunately, I can't figure out how to define it in the material builder.


Thanks!!

Nick
2 Replies Last Post 9 déc. 2013, 22:26 UTC−5
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Hello Nicholas Kennedy

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Daniel Milobar
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Posted: 1 decade ago 31 janv. 2013, 12:27 UTC−5
I'm having the same problem. I'm trying to model a shell and tube heat exchanger flowing a reformate mixture from a Fischer Tropsche reactor.

I imagine it's as easy as defining the user defined material. But I don't think we can just define a bulk gas with certain properties as some of the constituents might precipitate out at different temperatures than the others.

Any tips?

Thanks,

Danny
I'm having the same problem. I'm trying to model a shell and tube heat exchanger flowing a reformate mixture from a Fischer Tropsche reactor. I imagine it's as easy as defining the user defined material. But I don't think we can just define a bulk gas with certain properties as some of the constituents might precipitate out at different temperatures than the others. Any tips? Thanks, Danny
Sina Back
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Posted: 1 decade ago 9 déc. 2013, 22:26 UTC−5
this is my problem too!
this is my problem too!

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