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Old   January 4, 2011, 17:27
Default Coal gasification fluent
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Hi all,

I am trying to simulate coal gasification using species transport, finite rate chemistry/eddy dissipation model....

These are the reactions I want to include:
Heterogeneous Reactions:
C(s)+0.5O2 --> CO
C(s)+CO2 --> 2CO
C(s)+H2O --> CO+H2
Homogeneous Reactions:
Volatiles+O2 --> CO2+H2O
CO+0.5O2 --> CO2
CO+H2O --> CO2+H2
CO2+H2 --> CO2+H2O
H2+0.5O2 --> H2O

I have chosen coal-mv-volatiles-air as the mixture material...but having confusion over what species to include in the mixture /fluid /solid under the materials tab...I am using FLUENT 12.1 version...
could anyone please suggest on this...

thanks
Arnab
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Old   February 24, 2013, 02:04
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prishor p k
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dear arnab,

i am prishor. i am doing the simulation of biomass gasification in Fludized bed. i am also stuck with the material entry in material panel. for the homogeneous reaction is it necessary to enter each reactant mixture in material tab?.
please help me if you have any idea.

thanks and regards,
prishor p k

Quote:
Originally Posted by arnab View Post
Hi all,

I am trying to simulate coal gasification using species transport, finite rate chemistry/eddy dissipation model....

These are the reactions I want to include:
Heterogeneous Reactions:
C(s)+0.5O2 --> CO
C(s)+CO2 --> 2CO
C(s)+H2O --> CO+H2
Homogeneous Reactions:
Volatiles+O2 --> CO2+H2O
CO+0.5O2 --> CO2
CO+H2O --> CO2+H2
CO2+H2 --> CO2+H2O
H2+0.5O2 --> H2O

I have chosen coal-mv-volatiles-air as the mixture material...but having confusion over what species to include in the mixture /fluid /solid under the materials tab...I am using FLUENT 12.1 version...
could anyone please suggest on this...

thanks
Arnab
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Old   February 24, 2013, 06:36
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Saeed Sadeghi
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I have modeled Fixed-Bed combustion by UDF programming in fluent. Fluidized bed may be like that.
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Old   February 26, 2013, 02:01
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prishor p k
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dear saeed,
thank you for your kind reply.i have a doubt that where i should enter both heterogeneous and homogeneous reaction...
whether to enter homogeneous reaction in species transport panel and heterogeneous reaction in phase interaction panel only..
can you help me with your UDF so that i will get some idea about UDF for multiphase.

awaiting your valuable reply,
thanks and regards,
prishor



QUOTE=msaeedsadeghi;409764]I have modeled Fixed-Bed combustion by UDF programming in fluent. Fluidized bed may be like that.[/QUOTE]
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Old   February 26, 2013, 02:08
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Saeed Sadeghi
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Please email me a sample paper to check and help in defining parameters.
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Old   February 26, 2013, 02:28
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okkay mr. saeed i will a sample journal paper in which they mention the coal gasification with some reactions and its rate constants.


thanks and regards,
prishor
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