窒素プラズマによる燃焼排ガス中の窒素酸化物除去に関する研究 : 第2報, NO_x除去特性に及ぼす排ガス中のO_2, CO_2, H_2Oの影響

概要

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The purpose of this study is to investigate the possibility of removing NO_x contained in combustion exhaust gases by N_2 plasma injection. The simulated exhaust gas (N_2+O_2+CO_2+NO) was mixed with nitrogen atoms produced in the N_2 plasma, and the effects of O_2 and CO_2 on the reduction of NO_x and CO generation were studied experimentally. The NO_x removal ratio η of 40 to 50% is observed under the conditions of O_2 concentration, 3 to 5%, plasma power, 600W, and CO concentration contained in gas, about 300ppm. Removal ratio η is highest for a low reaction temperature less than 500K. The value of η is reduced to 20% due to the addition of H_2O to gas. However, the recovery of η is obtained by changing the gas injection site to plasma; this is caused by the decrease of OH radical formation. Retention time required for reaction is on the order of several tens of milliseconds.
一般社団法人日本機械学会の論文
1992-08-25