TITLE

Pilot-Scale Aftertreatment Using Nonthermal Plasma Reduction of Adsorbed NO in Marine Diesel-Engine Exhaust Gas

AUTHOR(S)
Kuwahara, Takuya; Yoshida, Keiichiro; Kuroki, Tomoyuki; Hanamoto, Kenichi; Sato, Kazutoshi; Okubo, Masaaki
PUB. DATE
January 2014
SOURCE
Plasma Chemistry & Plasma Processing;Jan2014, Vol. 34 Issue 1, p65
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Regulations governing marine diesel engine NO emissions have recently become more stringent. As it is difficult to fulfill these requirements by combustion improvements alone, effective aftertreatment technologies are needed to achieve efficient NO reductions. In this study, we develop an effective NO-reduction aftertreatment system for a marine diesel engine that employs combined nonthermal plasma (NTP) and adsorption. Compared with selective catalytic reduction, the proposed technology offers the advantages of not requiring a urea solution or harmful heavy-metal catalysts and low operating temperatures of less than 150 °C. The NO reduction comprises repeated adsorption and desorption flow processes using NTP combined with NO adsorbents made of MnO-CuO. High concentrations of NO are treated by NTP after NO adsorption and desorption, and this aftertreatment system demonstrates excellent energy efficiencies of 161 g(NO)/kWh, which fulfills the most recent International Maritime Organization emission NO standards in the Tier II-III regulations for 2016 and requires only 4.3 % of the engine output power.
ACCESSION #
93434917

 

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