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

Modelling CO2 adsorption (porous media + surface reaction)

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 21, 2014, 05:02
Unhappy Modelling CO2 adsorption (porous media + surface reaction)
  #1
New Member
 
Zaragoza
Join Date: Nov 2014
Posts: 4
Rep Power: 11
asfrallego is on a distinguished road
Hello there.

I am handling an adsorption of CO2 into alumina support impregnated with DEA in a fixed bed reactor. The adsorption reaction is modelled as CO2+2DEA-->product1+product2+heat (arrhenius behaviour).

The mixture species involves as bulk (co2, n2, o2, steam) and site species (dea, prod1 and prod2). The support does not have any effect on the reaction.

First I launch a simulation with no reaction to initialize a preliminar flow with no CO2. Then I turn on the transient and surface reaction equations and set up CO2 to target value at inlet. After some iterations, CO2 seems to not enter in the volume.

I try to set up a CO2 flow as initial solution and then activates the reaction. The reaction rate, heat of reaction, DEA coverage and products coverage evolves accordingly as expected with time. But CO2 concentration does not vary as long as it does not flow. Seems to be 'freezed'.

If you guys have any trick or you have handled this before, please answer me. Any suggestion will be greatfull accepted.
asfrallego is offline   Reply With Quote

Reply

Tags
adsorption modelling, catalytic reaction, porous media, species transport, surface reaction

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
surface reaction, porous media Ali FLUENT 2 March 31, 2016 17:26
Modelling capillary forces in porous media s3s4m CFX 3 October 27, 2011 06:12
Porous media and chemical reaction pepa FLUENT 10 August 20, 2003 05:24
Modelling porous media Rina Main CFD Forum 0 April 10, 2002 10:01
Modelling porous media adjacent to viscous flow Rina Lum Main CFD Forum 1 March 25, 2002 16:55


All times are GMT -4. The time now is 12:03.