Project Nexus is a tech mod with some helpful machines. For Recipes use Jei
Make a Coal Generator to generate power and use it in the Electric Furnace or the Macerator.
Nexium can only be crafted in the Nexium Crafter.
Ore doubling can be done by putting iron, gold or copper ore in the Macerator and then putting those two specks of dust into the Electric Furnace.