Eulerian Granular model
 

Hello,
i am modeling coal gasification in a fluidized bed using eulerian granular model.
the primary phase is air(fluid) and the carbon-solid(fluid) is the granular phase. i am not able to run the heterogeneous reaction module. the problem is, in the phase interaction panel, in the heterogeneous reactions dialog box, the species menu is disabled for the carbon phase.
Please help!!