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 (2002) Performance evaluation of nonthermal plasma reactors for NO oxidation in diesel engine exhaust gas treatment. In: Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE Industry Applications Conference, 2001, Sept. 30 2001-Oct. 4 2001, Chicago, IL, USA.

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Abstract

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.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 2002 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.
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	12 Apr 2012 06:48
Last Modified:	12 Apr 2012 06:48
URI:	http://eprints.iisc.ac.in/id/eprint/44141

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