HTPB fuel species and stoichiometric ratio
 

Hi, I am having difficulty modeling the combustion of NO2 and HTPB. I try to model HTPB by replacing with other liquid fuel that has the same stoichiometric ratio of around 6.5. My problem is I dont know how to set up the fuel species for this particular problem. Does anybody have a know ledge of how many %C %H etc. should there be in replacement of HTPB or any known fuel of around 6.5 ratio wrt NO2?