Catalytic Removal of Nitric Oxide and Hydrogenation to Ammonia

Based on the concept of N1 Chemistry, we carried out systematic research on the thermocatalytic removal of NO and its resource conversion to ammonia, establishing a novel pathway for the nitrogen cycle transformation of N₂–NO–NH₃. Relying on regional characteristic resources, vermiculite-based "ice-curling" catalysts were designed through interface engineering to enhance the adsorption and activation of gas molecules at the reaction interface; process intensification technology was utilized to regulate Lewis acid sites and oxygen vacancies to achieve zero ammonia slip in low-temperature denitration; micro-nano porous microspheres were constructed to improve the coating performance of monolithic catalysts, and 3D printing was introduced to prepare integrated denitration catalytic materials with adjustable configurations. Meanwhile, various metal oxides, composite-modified and MOF-derived thermocatalytic systems were developed, and precise regulation of active sites, interface structures and reduction pathways was realized in thermocatalytic reactions including CO-SCR and H₂-SCR, achieving efficient low-temperature NO removal and highly selective hydrogenation to ammonia while integrating pollutant control and resource utilization. The research revealed the key mechanisms of NO activation, hydrogenation conversion and ammonia formation, laying a theoretical foundation and technical support for low-temperature industrial flue gas denitration and low-carbon resource utilization of NO. We believe that the concept of N1 Chemistry will provide new insights for the efficient interconversion of N2–NO–NH3 in the natural nitrogen cycle.