Method and Apparatus for In-Situ Production of Ammonia or Ammonium Salts from N2 via Subsurface Ge

Methods, systems, and apparatuses for subsurface production of ammonia and/or ammonium salts are provided. For example, the techniques disclosed herein can leverage pressure and temperature of the earth’s crust to provide optimal conditions for the formation of ammonia and/or ammonium salts by conducting the reaction of hydrogen gas and nitrogen gas via geochemistry. Hydrogen gas can be formed within the earth’s crust by transporting water to react with ultramafic rocks including but not limited to peridotites, olivines, pyroxenes, and/or fayalite at the earth’s subsurface. The hydrogen gas can be collected in a reservoir and then passed to a reaction tank while pumping nitrogen gas into the earth’s crust. Following ammonia formation, the ammonia gas can be collected for storage and/or transport. Alternatively, nitrogen gas and hydrogen gas can react with a secondary reactant in the reaction zone to form ammonium salt, which can then be mined, excavated, extracted, and/or collected.