You can adjust the ingredients for the recipies in prototypes/recipies.lua
And for the pollution-settings you have to look at the cokery-definition in prototypes/buildingPrototypes.lua
The setting can be found at the bottom of the definition and is called "emissions"

Thanks a lot for your answer ...

It's very interesting mod, but I think that in production line from tree farm (wood -> charcoal -> coal -> coke) produced to small pollution, it will be more realistic if that parameter will be much bigger (like in real life, when you burned wood to get charcoal). And also we get too much charcoal ...