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

Takuya Kuwahara, Keiichiro Yoshida, Tomoyuki Kuroki, Kenichi Hanamoto, Kazutoshi Sato and Masaaki Okubo
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Takuya Kuwahara: Department of Mechanical Engineering, Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro-machi, Minamisaitama, Saitama 345-8501, Japan
Keiichiro Yoshida: Department of Electrical and Electronic Systems Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
Tomoyuki Kuroki: Department of Mechanical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan
Kenichi Hanamoto: Daihatsu Diesel MFG. Co., Ltd., 45 Amura-cho, Moriyama city, Shiga 524-0035, Japan
Kazutoshi Sato: Daihatsu Diesel MFG. Co., Ltd., 45 Amura-cho, Moriyama city, Shiga 524-0035, Japan
Masaaki Okubo: Department of Mechanical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan

Energies, 2019, vol. 12, issue 19, 1-13

Abstract: An efficient NO x reduction aftertreatment technology for a marine diesel engine that combines nonthermal plasma (NTP) and NO x adsorption/desorption is investigated. The aftertreatment technology can also treat particulate matter using a diesel particulate filter and regenerate it via NTP-induced ozone. In this study, the NO x reduction energy efficiency is investigated. The investigated marine diesel engine generates 1 MW of output power at 100% engine load. NO x reduction is performed by repeating adsorption/desorption processes with NO x adsorbents and NO x reduction using NTP. Considering practical use, experiments are performed for a larger number of cycles compared with our previous study; the amount of adsorbent used is 80 kg. The relationship between the mass of desorbed NO x and the energy efficiency of NO x reduction via NTP is established. This aftertreatment has a high reduction efficiency of 71% via NTP and a high energy efficiency of 115 g(NO 2 )/kWh for a discharge power of 12.0 kW.

Keywords: aftertreatment; energy efficiency; marine diesel engine; nonthermal plasma; NO x (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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