Performance evaluation of nonthermal plasma reactors for NO oxidation in diesel engine exhaust gas treatment
Performance evaluation of nonthermal plasma reactors for NO oxidation in diesel engine exhaust gas treatment
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DOI：
10.1109/tia.2003.818988
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发表时间：
2001-09
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影响因子：
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通讯作者：
Toshiaki Yamamoto;B. Rajanikanth;M. Okubo;T. Kuroki;M. Nishino
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文献类型：
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作者：
Toshiaki Yamamoto;B. Rajanikanth;M. Okubo;T. Kuroki;M. Nishino
与传统的选择性催化还原系统相比，用于去除尾气排放中NOₓ的放电等离子体 - 化学混合工艺是一种极其有效且经济的方法。在本文中，我们从NO去除效率的角度对几种放电等离子体反应器进行了相关比较。这些反应器由交流电或重复脉冲供电。使用铁电颗粒来研究颗粒辅助放电对气体净化的影响。使用不同负载下的柴油发动机排气来大致模拟尾气成分。在室温下，针对反应产物随放电功率的变化进行了研究。主要重点在于在不降低NOₓ浓度（即产生最少的反应副产物）且消耗最少功率的情况下，将NO氧化为NO₂。使用Na₂SO₃可将生成的NO₂完全转化为N₂和Na₂SO₄。当NO浓度较低（约100 ppm）时，交流填充床反应器和无颗粒脉冲电晕反应器在给定功率下表现出更好的性能，且反应产物最少。在高发动机负载（NO > 300 ppm）时，NOₓ的减少没有太大差异，并且几乎所有反应器的性能都相同。本文详细讨论了这些观察结果。
The discharge plasma-chemical hybrid process for NO/sub x/ removal from the due gas emissions is an extremely effective and economical approach in comparison with the conventional selective catalytic reduction system. In this paper we bring out a relative comparison of several discharge plasma reactors from the point of NO removal efficiency. The reactors were either energized by AC or by repetitive pulses. Ferroelectric pellets were used to study the effect of pellet assisted discharges on gas cleaning. Diesel engine exhaust, at different loads, is used to approximately simulate the due gas composition. Investigations were carried out at room temperature with respect to the variation of reaction products against the discharge power. Main emphasis is laid on the oxidation of NO to NO/sub 2/, without reducing NOx concentration (i.e., minimum reaction byproducts), with least power consumption. The produced NO/sub 2/ will be totally converted to N/sub 2/ and Na/sub 2/SO/sub 4/ using Na/sub 2/SO/sub 3/. The AC packed bed reactor and pelletless pulsed corona reactor showed better performance, with minimum reaction products for a given power, when the NO concentration was low (/spl sim/100 ppm). At high engine loads (NO>300 ppm) there was not much decrease in NO/sub x/ reduction and more or less all the reactors performed equally. The paper discusses these observations in detail.