[moataz.che]

I am working on FLUENT 6.3 on a Circulating fluidised bed "Reactor" case. I am just not sure which model shall I use to model the catalytic reactions in my multiphase case (Gas-Solid flow).
There are 2 options:-
1- Use heterogeneous model which I can find at "Define-->Phases--> Interactions--> Reactions"
2- Enable "Particle Surface" reaction from "Define--> Models-->Species---> Transport & Reaction" then define the reaction from Mixture material properties at "Define materials" and choose catalyst as a solid phase.

Which one shall I go for, or do both of them work?

I am highly appreciating your cooperation.
Thanks in advance and looking forward for you reply.