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System and method for regeneration and recirculation of a reducing agent using highly exothermic reactions induced by mixed industrial slags

United States Patent

9,840,756
December 12, 2017
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
Use of Mixed Waste Slags for the Conversion of CO2/H20 to CO/H2
Embodiments relate to systems and methods for regenerating and recirculating a CO, H.sub.2 or combinations thereof utilized for metal oxide reduction in a reduction furnace. The reduction furnace receives the reducing agent, reduces the metal oxide, and generates an exhaust of the oxidized product. The oxidized product is transferred to a mixing vessel, where the oxidized product, a calcium oxide, and a vanadium oxide interact to regenerate the reducing agent from the oxidized product. The regenerated reducing agent is transferred back to the reduction furnace for continued metal oxide reductions.
Nakano; Jinichiro (Albany, OR), Bennett; James P. (Salem, OR), Nakano; Anna (Albany, OR)
U.S. Department of Energy (Washington, DC)
14/ 790,082
July 2, 2015
GOVERNMENT INTERESTS The United States Government has rights in this invention pursuant to the employer-employee relationship of the Government to the inventors as U.S. Department of Energy employees and site-support contractors at the National Energy Technology Laboratory.