So it's simple, Since the brewery plugin is nice and fun to learn, it should at least have some use.

So either make a new brew that is meant to be used in combustion reactors or just add existing distilled drinks and ruined potions to the list of things that can be used in Combustion reactors.

My guess is that the amount of energy generated can be half of what fuel does, but who knows, maybe Combustion reactors have a refined palate and are willing to give away more energy for 5-star drinks *audible wink*