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simulation a surface reaction in a continuous catalytic wall reactor
Posted Jul 28, 2015, 12:25 p.m. EDT Chemical Reaction Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.1 2 Replies
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Hello,
I am new in Comsol and I am trying to simulate a heterogeneous catalytic process in a continuous catalytic wall reactor. The reactor is a flat plat which one of the walls is coated with catalyst. The reactant diffuses from the bulk to the catalytic surface to adsorb on the catalyst surface and react on the catalyst active sites. I have used laminar flow and the transport of diluted species modules to simulate the distribution of the reactant within the reactor. Now I want to add the reaction to my simulation but unfortunately I can not find a proper tutorial to find out how I should add the reaction.
I have found different modules such as chemical reaction and surface reaction modules in physics and also there is a reaction option in the transport of diluted species module. however, I do not know which of them is more suitable for my simulation. I know the reaction rate equation. I was wondering if somebody can give me some similar tutorial or help me with the reaction simulation.
Best, Maryam
I am new in Comsol and I am trying to simulate a heterogeneous catalytic process in a continuous catalytic wall reactor. The reactor is a flat plat which one of the walls is coated with catalyst. The reactant diffuses from the bulk to the catalytic surface to adsorb on the catalyst surface and react on the catalyst active sites. I have used laminar flow and the transport of diluted species modules to simulate the distribution of the reactant within the reactor. Now I want to add the reaction to my simulation but unfortunately I can not find a proper tutorial to find out how I should add the reaction.
I have found different modules such as chemical reaction and surface reaction modules in physics and also there is a reaction option in the transport of diluted species module. however, I do not know which of them is more suitable for my simulation. I know the reaction rate equation. I was wondering if somebody can give me some similar tutorial or help me with the reaction simulation.
Best, Maryam
2 Replies Last Post Jul 29, 2015, 8:13 a.m. EDT
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Posted:
9 years ago
Hi
Surface reactions are taken into account as flux boundary conditions in the Transport of Diluted Species physics. Just take care that the dimensions agree:
±dn/dt = J·A = reaction rate
where
J = ( ) mol/(cm2s) = flux density
A = ( ) cm2 = reaction area
BR
Lasse
Surface reactions are taken into account as flux boundary conditions in the Transport of Diluted Species physics. Just take care that the dimensions agree:
±dn/dt = J·A = reaction rate
where
J = ( ) mol/(cm2s) = flux density
A = ( ) cm2 = reaction area
BR
Lasse
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Posted:
9 years ago
Dear Lasse
thanks for your reply.
Do you mean that I should couple the surface reaction phyics to the transport of diluted species physics?
I have read in one of the Comsol tutorials that the surface reacion module is suitble for the considtions where the flow stream is prependicular to the reacting surface, is that correct? In my reactor, the flow stream is parallel to the reacting surface and as you mentioned the reaction on the surface is one of the boundary conditions.
It aslo ask fo the surface properties sucha s site density on the surface which I do not know. Are defult value good to be used?
if you have any similar tuttorial can you send it to me?
Best, Maryam
thanks for your reply.
Do you mean that I should couple the surface reaction phyics to the transport of diluted species physics?
I have read in one of the Comsol tutorials that the surface reacion module is suitble for the considtions where the flow stream is prependicular to the reacting surface, is that correct? In my reactor, the flow stream is parallel to the reacting surface and as you mentioned the reaction on the surface is one of the boundary conditions.
It aslo ask fo the surface properties sucha s site density on the surface which I do not know. Are defult value good to be used?
if you have any similar tuttorial can you send it to me?
Best, Maryam