Unreacted shrinking core model in Fluent

harinp715 · March 20, 2010, 01:54

Hi..
I have to solve the problem of iron ore reduction(i.e reduction of Fe2O3 to Fe3O4, and subsequently to FeO and Fe) using fluent. The following reactions take place

3Fe2O3 + CO ----> 2Fe3O4 + CO2
Fe3O4 + CO ----> 3FeO + CO2
FeO + CO ----> Fe + CO2

Initially there is a solid sphere of Fe2O3 in a stream of CO gas.. It reacts with CO to form a layer of Fe3O4, and in that process Fe2O3 gets consumed.. So an unreacted core of Fe2O3 remains and a layer of Fe3O4 is there over it.. The reaction interface keeps moving radially inside as time progresses.. So CO from surface has to diffuse from surface of solid to the interface between unreacted core and Fe3O4..

How is it possible to model this moving reaction interface in Fluent?
I tried the surface reaction model.. But then as the interface moves inside, both sides of the reaction interface become solids..

I am stuck at this problem for quite sometime... Will be great to get a breakthrough ..

harinp715 · March 27, 2010, 05:26

Can someone suggest something??

harinp715 · May 10, 2010, 17:07

Hello World,

This is the request from a deprived soul, who has been battling with the above problem from time immemorial. If you have seen it and do not know how to go about, people atleast do give me some hope. Such an insignificant thing has really strangled the happiness out of my life. My girl ditched me and am broke and really depressed. Please please do guide me or atleast put me through to someone who can help me.
Consider this as a life-saving request.

Thanks and regards
Mr. Desperate

Sixteen · May 11, 2010, 08:23

Maybe I'm wrong, but I would suggest that if it is spherical model, there is only one dimension... There is no need for a geometrical solver as fluent, and no need for a 3D finite volum method. You could solve this problem without fluent, by solving the equations on a 1D model.

kar982 · July 17, 2010, 22:26

Hi,

We have used FLUENT to model reduction of hematite (Fe2O3) to Wustite (FeO) through a two step reduction mechanism. The goal in our analysis was analyzing the performance of a chemical looping combustion fuel reactor utilizing iron oxide as carrier.

In your case it seems that you are interested in modeling a single particle?
As cecilia pointed out; you can do this using a simple 1-D model. It would be great if you share the objective of your study.

I can also send you some of our as yet unpublished CFD papers in this area. Let me know.

Thanks,

Kartik

souza.emer · September 20, 2018, 10:35

Hi, Kartik.

If you still have those papers, can you please send it to me? I'm interested in this field.

email: emersonedilsonbs@hotmail.com

Thanks =]

FazalRa · February 8, 2023, 02:02

Hello Everyone, I am currently starting to work on CFD simulation of CLC systems. I have a lot of questions. But there is one thing that I can't find anywhere. How to incorporate Iron oxide and aluminum oxide as materials in FLUENT. I am unable to find any source regarding this. Can anyone help me in this regard?

March 20, 2010, 01:54	Unreacted shrinking core model in Fluent	#1
harinp715 New Member Hari Narayanan P Join Date: Mar 2010 Posts: 3 Rep Power: 16	Hi.. I have to solve the problem of iron ore reduction(i.e reduction of Fe2O3 to Fe3O4, and subsequently to FeO and Fe) using fluent. The following reactions take place 3Fe2O3 + CO ----> 2Fe3O4 + CO2 Fe3O4 + CO ----> 3FeO + CO2 FeO + CO ----> Fe + CO2 Initially there is a solid sphere of Fe2O3 in a stream of CO gas.. It reacts with CO to form a layer of Fe3O4, and in that process Fe2O3 gets consumed.. So an unreacted core of Fe2O3 remains and a layer of Fe3O4 is there over it.. The reaction interface keeps moving radially inside as time progresses.. So CO from surface has to diffuse from surface of solid to the interface between unreacted core and Fe3O4.. How is it possible to model this moving reaction interface in Fluent? I tried the surface reaction model.. But then as the interface moves inside, both sides of the reaction interface become solids.. I am stuck at this problem for quite sometime... Will be great to get a breakthrough .. souza.emer likes this.

July 17, 2010, 22:26	What is the goal of the analysis?	#5
kar982 New Member Kartik Mahalatkar Join Date: Jul 2010 Posts: 1 Rep Power: 0	Hi, We have used FLUENT to model reduction of hematite (Fe2O3) to Wustite (FeO) through a two step reduction mechanism. The goal in our analysis was analyzing the performance of a chemical looping combustion fuel reactor utilizing iron oxide as carrier. In your case it seems that you are interested in modeling a single particle? As cecilia pointed out; you can do this using a simple 1-D model. It would be great if you share the objective of your study. I can also send you some of our as yet unpublished CFD papers in this area. Let me know. Thanks, Kartik souza.emer likes this.

February 8, 2023, 02:02	Require help for CLC simulation.	#7
FazalRa New Member Fazal e Rabbi Join Date: Nov 2022 Posts: 1 Rep Power: 0	Hello Everyone, I am currently starting to work on CFD simulation of CLC systems. I have a lot of questions. But there is one thing that I can't find anywhere. How to incorporate Iron oxide and aluminum oxide as materials in FLUENT. I am unable to find any source regarding this. Can anyone help me in this regard?

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March 27, 2010, 05:26		#2
harinp715 New Member Hari Narayanan P Join Date: Mar 2010 Posts: 3 Rep Power: 16	Can someone suggest something??

May 10, 2010, 17:07		#3
harinp715 New Member Hari Narayanan P Join Date: Mar 2010 Posts: 3 Rep Power: 16	Hello World, This is the request from a deprived soul, who has been battling with the above problem from time immemorial. If you have seen it and do not know how to go about, people atleast do give me some hope. Such an insignificant thing has really strangled the happiness out of my life. My girl ditched me and am broke and really depressed. Please please do guide me or atleast put me through to someone who can help me. Consider this as a life-saving request. Thanks and regards Mr. Desperate

May 11, 2010, 08:23		#4
Sixteen New Member Cecilia Join Date: May 2010 Posts: 3 Rep Power: 16	Maybe I'm wrong, but I would suggest that if it is spherical model, there is only one dimension... There is no need for a geometrical solver as fluent, and no need for a 3D finite volum method. You could solve this problem without fluent, by solving the equations on a 1D model.

September 20, 2018, 10:35		#6
souza.emer Member Emerson Join Date: May 2018 Posts: 35 Rep Power: 8	Hi, Kartik. If you still have those papers, can you please send it to me? I'm interested in this field. email: emersonedilsonbs@hotmail.com Thanks =]