Reaction Source Term in Steady Species transport equation
 

I would like to know how the reaction source term will be treated in steady species transport equation. The reaction source will have 1/time as unit, but when I write steady state species transport equation solver I dont have any time with me .. how will decide how much of source I should put on each cell based on reaction rate ..

Otherwise, How to I get species source/sink (kg/m3) from reaction rate (kg/s) for each cell in steady state flow.

Thanks