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-   -   Coal gasification fluent (http://www.cfd-online.com/Forums/fluent/83596-coal-gasification-fluent.html)

arnab January 4, 2011 17:27

Coal gasification fluent
 
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

prishor February 24, 2013 02:04

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 (Post 289255)
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


msaeedsadeghi February 24, 2013 06:36

I have modeled Fixed-Bed combustion by UDF programming in fluent. Fluidized bed may be like that.

prishor February 26, 2013 02:01

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]

msaeedsadeghi February 26, 2013 02:08

Please email me a sample paper to check and help in defining parameters.

prishor February 26, 2013 02:28

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

NiBa January 19, 2015 08:22

[QUOTE=arnab;289255]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

In homogenous reactions do you know from what species consist of the volatiles? or do you define this volatiles with another option? i have a similar problem to the understanding of my fuel.
thank you

mohammadjm2008 August 21, 2016 07:30

Coal Combustion
 
Dear Saeed,
I am trying to simulate coal combustion by UDF programming in fluent.
Would you please help me by a sample UDF file?

Email address: Mohammad_jm2008@yahoo.com

Thanks in advaned

Best regards
Yazdanpanah


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