[Per_Holmgren]

Hi guys, I hope this is the right forum for my question...

Anyway, I'm doing simulation of wood particles as they fall through a hot tube with an atmosphere consisting of a mix of flue gases from propane and pure air.
I got everything working rather nicely with my UDF for particle density evolution drag and so on, and I got my chemical mechanisms working, but I'm stuck at defining the composition of my wood particles.

Most wood have a % of bound moisture that I would like to include, and I am primarily interested in the release and evolution of potassium(K) bound in the particle.

How would I go about changing the material "wood" to have a different chemical composition?

In the file propdb.scm can find wood and I can fiddle around with it, but I don't understand how I can change what materials are released during combustion?
It looks obvious enough from the "wood-volatiles-air mixure" material where we have "1wood_vol + 1.058o2 --> 1co2 + 1.191h2o", but is this what fluent uses when my "wood" material is combusting during simulation?

Best Regards
/Per Holmgren