Performance evaluation of nonthermal plasma reactors for NO oxidation in diesel engine exhaust gas treatment

Yamamoto, T and Rajanikanth, BS and Okubo, M and Kuroki, T and Nishino, M (2003) Performance evaluation of nonthermal plasma reactors for NO oxidation in diesel engine exhaust gas treatment. In: IEEE Transactions on Industry Applications, 39 (6). 1608-1613 .

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Abstract

The discharge plasma-chemical hybrid process for NOinfinity removal from the flue 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 flue 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 NO2, without reducing NOx concentration (i.e., minimum reaction byproducts), with least power consumption. The produced NO2 will be totally converted to N-2 and Na-2 SO4 using Na-2 SO3. 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 (similar to 100 ppm). When the engine load exceeds 50% (NO > 300 ppm) there was not much decrease in NO reduction and more or less all the reactors performed equally. The total operating cost of the plasma-chemical hybrid system becomes $4010/ton of NO, which is 1/3-1/5 of the conventional selective catalytic process.

Item Type:	Journal Article
Publication:	IEEE Transactions on Industry Applications
Publisher:	IEEE
Additional Information:	Copyright 2003 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Diesel engine;exhaust gas treatment;hybrid system;NO; nonthermal plasma;plasma.
Department/Centre:	Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited:	25 Aug 2011 09:17
Last Modified:	25 Aug 2011 09:17
URI:	http://eprints.iisc.ac.in/id/eprint/40164

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