Devolatilization species
 

hi, i am working in combusting particle devolatilization problem. So in DPM Injection properties I chose a material as combusting particle. Here there is an option to specify a devolatilizing species. But for me the combusting particle is being split into two gaseous species directly. How can I specify two devolatilizing species??
The devolatilization is as follows
Solid1 ---->Gas 1 + Gas 2
How to do this, Please help...