Mixing Two Gas Compositions

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Wilmer Flores

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Sep 8, 2014, 3:03:29 PM9/8/14
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I have two gas compositions that I would like to mix together (g1 + g2 = Gmix). If the properties of both gases differ in temperature, pressure, compositions, etc. How can I add them together to obtain a final gas mixture(Gmix)? 

Once I have Gmix then I can use equilibrate function that will give me all the properties of that gas mixture. 

I'm using matlab to run cantera.

Addison Stark

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Sep 9, 2014, 12:26:38 PM9/9/14
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Hi Wilmer,

The easiest way to do this is to write the energy/mass/entropy/species balance equations on your own using the outputs from the two previous gas mixtures, then input that into a new gas mixture for further reactor modeling etc. You will need to be sure of how these two gas flows would be mixed in real life (do you have a final pressure that is predefined? will you compress up to the higher pressure or exit at the lower pressure? etc...) then you can model this mixing process in a correct manner (isenthalpic? isentropic?).

Addison
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