High Reduction Efficiencies of Adsorbed NOx in Pilot-Scale Aftertreatment Using Nonthermal Plasma in Marine Diesel-Engine Exhaust Gas

An efficient NOx reduction aftertreatment technology for a marine diesel engine that combines nonthermal plasma (NTP) and NOx 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 NOx reduction energy efficiency is investigated. The investigated marine diesel engine generates 1 MW of output power at 100% engine load. NOx reduction is performed by repeating adsorption/desorption processes with NOx adsorbents and NOx 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 NOx and the energy efficiency of NOx reduction via NTP is established. This aftertreatment has a high reduction efficiency of 71% via NTP and a high energy efficiency of 115 g(NO2)/kWh for a discharge power of 12.0 kW.

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Pilot-scale experiments of continuous regeneration of ceramic particulate filter in marine diesel engine using nonthermal plasma-induced radicals

2011 IEEE Industry Applications Society Annual Meeting ◽

10.1109/ias.2011.6074286 ◽

2011 ◽

Cited By ~ 1

Author(s):

Masaaki Okubo ◽

Takuya Kuwahara ◽

Tomoyuki Kuroki ◽

Keiichiro Yoshida ◽

Kenichi Hanamoto ◽

...

Keyword(s):

Diesel Engine ◽

Nonthermal Plasma ◽

Pilot Scale ◽

Particulate Filter ◽

Marine Diesel Engine ◽

Ceramic Particulate ◽

Marine Diesel ◽

Continuous Regeneration

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Pilot-Scale Experiments of Continuous Regeneration of Ceramic Diesel Particulate Filter in Marine Diesel Engine Using Nonthermal Plasma-Induced Radicals

IEEE Transactions on Industry Applications ◽

10.1109/tia.2012.2209389 ◽

2012 ◽

Vol 48 (5) ◽

pp. 1649-1656 ◽

Cited By ~ 15

Author(s):

Takuya Kuwahara ◽

Keiichiro Yoshida ◽

Kenichi Hanamoto ◽

Kazutoshi Sato ◽

Tomoyuki Kuroki ◽

...

Keyword(s):

Diesel Engine ◽

Diesel Particulate Filter ◽

Nonthermal Plasma ◽

Pilot Scale ◽

Particulate Filter ◽

Marine Diesel Engine ◽

Diesel Particulate ◽

Marine Diesel ◽

Continuous Regeneration

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Comparison of removal efficiency of diesel particulate filter with different measurement methods in a high-speed marine diesel engine

Journal of the Korean Society of Marine Engineering ◽

10.5916/jkosme.2017.41.4.362 ◽

2017 ◽

Vol 41 (4) ◽

pp. 362-367

Author(s):

Ik-Sung Lee ◽

Dong-Kyun Ko ◽

Gun-Feel Moon ◽

Youn-Woo Nam ◽

Shin-Han Kim ◽

...

Keyword(s):

Diesel Engine ◽

Removal Efficiency ◽

Diesel Particulate Filter ◽

High Speed ◽

Measurement Methods ◽

Particulate Filter ◽

Marine Diesel Engine ◽

Diesel Particulate ◽

Marine Diesel

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Numerical Analysis of NOx Reduction Using Ammonia Injection and Comparison with Water Injection

Journal of Marine Science and Engineering ◽

10.3390/jmse8020109 ◽

2020 ◽

Vol 8 (2) ◽

pp. 109 ◽

Cited By ~ 5

Author(s):

María Isabel Lamas Galdo ◽

Laura Castro-Santos ◽

Carlos G. Rodriguez Vidal

Keyword(s):

Diesel Engine ◽

Nox Reduction ◽

Water Injection ◽

The Other ◽

Chemical Effect ◽

Injection Timing ◽

Marine Diesel Engine ◽

Marine Diesel ◽

Dilution Effects ◽

Ammonia Injection

This work analyzes NOx reduction in a marine diesel engine using ammonia injection directly into the cylinder and compares this procedure with water injection. A numerical model based on the so-called inert species method was applied. It was verified that ammonia injection can provide almost 80% NOx reduction for the conditions analyzed. Furthermore, it was found that the effectiveness of the chemical effect using ammonia is extremely dependent on the injection timing. The optimum NOx reduction was obtained when ammonia is injected during the expansion stroke, while the optimum injection timing using water is near top dead center. Chemical, thermal, and dilution effects of both ammonia and water injection were compared. The chemical effect was dominant in the case of ammonia injection. On the other hand, water injection reduces NOx through dilution and, more significantly, through a thermal effect.

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