Department of Diesel NOx Removal Process by Using Natural-Resource-and Energy-Assisted Ammonia Synthesis

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Ammonia is unique in reacting selectively with NOx even under high oxygen partial pressure if we use the well developed V_2O_5-TiO_2 catalyst. The purpose of this research is to produce hydrogen and nitrogen from natural resources (H_2O,Air) and energy (solar) and is to synthesize ammonia which is thereafter used to decompose NOx. The above processes are combined in a same place as a set so as not to carry or to store poisonous ammonia and can be used in the arban area or even the remote area.1) Hydrogen was successfully obtained from water electrolysis by using solar battery.2) One mole of air and 2.8mole of hydrogen were carafully passed through Pt/Al_2O_3 catalyst at around 90ﾟC to produce 0.8mole of (N_2+3H_2) gas (and 0.4mol H_2O).3) Ammonia was produced using several Ru catalysts newly developed including Ru-Ba/A.C.and Ru/CeO_2.4) Adsorption behavior on various solid acid materials were studied.5) 0.15% NO and 5% O_2 containing gas (model exhaust gas) was reacted on V_2O_5/TiO_2 with 0.15% NH_3 evolved from adsorption system.6) Data of the above processes were successfully accumulated and the property of the system and size were discussed.