CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Catalytic reaction, ratio of active to geometrical catalytic surface

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   September 29, 2013, 15:47
Default Catalytic reaction, ratio of active to geometrical catalytic surface
  #1
New Member
 
Mohammad Ghazvini
Join Date: Mar 2010
Posts: 16
Rep Power: 7
mahmohammad is on a distinguished road
Dear all,

I'm trying to simulate H2/O2 catalytic reaction on Pt. I'm using Fluent coupled with Chemkin to do that. I can do it just fine and I get reasonable results. But when I want to compare it against the experiments, I need to take the experimentally measured active catalyst sites into account. It's done by multiplying an F factor to the calculated rate of reaction at the boundaries with a catalyst. Since I don't have access to the boundary equations and species equations, what is the best way to add the experiment/geometry ratio factor?

I was thinking of multiplying the rate constant by the factor to increase/reduce the rate of the reactions.

Thanks a lot
mahmohammad is offline   Reply With Quote

Old   September 29, 2013, 16:01
Default
  #2
Senior Member
 
A CFD free user's Avatar
 
A-A Azarafza
Join Date: Jan 2013
Posts: 187
Rep Power: 4
A CFD free user is on a distinguished road
Quote:
Originally Posted by mahmohammad View Post
Dear all,

I'm trying to simulate H2/O2 catalytic reaction on Pt. I'm using Fluent coupled with Chemkin to do that. I can do it just fine and I get reasonable results. But when I want to compare it against the experiments, I need to take the experimentally measured active catalyst sites into account. It's done by multiplying an F factor to the calculated rate of reaction at the boundaries with a catalyst. Since I don't have access to the boundary equations and species equations, what is the best way to add the experiment/geometry ratio factor?

I was thinking of multiplying the rate constant by the factor to increase/reduce the rate of the reactions.

Thanks a lot
Hi dude
If you mean to set the value for specific active area in surface reaction which has a unit (1/m), then you can access it from Cell zone condition/ (interest zone)/ reaction/ surface to volume ratio (1/m)
Hope it helps
__________________
Regard yours
A CFD free user is offline   Reply With Quote

Reply

Tags
catalyst reaction surface, chemkin-cfd, fluent, heterogeneous reaction

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
surface reaction UDF taekyu8 Fluent UDF and Scheme Programming 1 June 16, 2013 03:23
Surface reaction rate temperature dependence tumbao FLUENT 1 February 17, 2011 10:14
Segmentation fault in running alternateSteadyReactingFoam,why? NewKid OpenFOAM 18 January 20, 2011 17:55
Surface Reaction Gabriella FLUENT 0 September 11, 2008 04:16
CFX4.3 -build analysis form Chie Min CFX 5 July 12, 2001 23:19


All times are GMT -4. The time now is 05:54.