プラズマによるラジカル生成と燃焼排ガス中のNOx除去(エンジン・システムの高性能化技術)

概要

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A technique for removing the NOx contained in combustion exhaust gas has been developed by using radicals produced in the mixing arc plasma. By feeding the gas mixture (Ar+H_2),(Ar+NH_3),(Ar+Diesel oil), (N_2+H_2),(N_2+NH_3),(N_2+Diesel oil) into arc plasma torch, hydrogen, ammonia and diesel oil radicals such as NH_2,NH,HC,N,H are produced, and these radicals are mixed in a reactor with the simulated exhaust gas (N_2+NO),(N_2+Air+NO). The NO decreases as a result of the formation of the innocuous products N_2,H_2O and CO_2 when O_2 is not contained in the gas. Under present experimental conditions, the thermal De-NOx process and the oxidation of ammonia, diesel oil are not expected. In the case of the gas (N_2+Air+NO), NOx increases with increasing input power to plasma. The effects of input power, molar ratio NH_3/NO, Diesel oil/NO, and the distance from nozzle exit to exhaust pipe L/d on the NOx removal rate are investigated experimentally.
2004-03-03