A Pilot-Scale Experiment for Total Marine Diesel Emission Control Using Ozone Injection and Nonthermal Plasma Reduction

Kuwahara, Taishi; Yoshida, Keiichiro; Hanamoto, Kenichi; Sato, Kazutoshi; Kuroki, Tetsuo; Okubo, Masaaki

doi:10.1109/tia.2014.2358798

Cited by 25 publications

(18 citation statements)

References 32 publications

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“…The same chamber that was used in a previous experiment is employed [2]. The adsorption chamber is designed optimally based on our results of the laboratory-scale experiment [25] and the previous pilot-scale ones [2,3]. The amount of packed adsorbent pellets is 80 kg, which represents 101 L by volume.…”

Section: Stroke Of Cylinder MM 300mentioning

confidence: 99%

“…Therefore, exhaust purification requires aftertreatment technologies [1]. These technologies have been extensively studied and developed in recent years, e.g., in our previous studies [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…Compared with SCR, this technology offers the advantages of eliminating the requirement of urea solution or harmful heavy-metal catalysts and operation at a temperature of <150 ºC. In our previous investigation [3], PM and NO x reductions were studied in the aftertreatment for a marine diesel engine with an output power of 610 kW. In another one of our previous studies [2], NO x reduction with NO x adsorbents unused in the aftertreatment was investigated for a marine diesel engine with an output power of 1071 kW.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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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Section: Stroke Of Cylinder MM 300mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…However, a pilot scale aftertreatment system that was a combination of NTP and adsorption has been designed and successfully met the most recent International Maritime Organization NOx emissions standards by removing 94% of NOx in the exhaust of a marine diesel engine [47,48]. This system operated on adsorption and desorption cycles where plasma was on during desorption cycle only and required ~4% of output engine power.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Non-thermal-plasma-activated de-NO _x catalysis

Gholami

Stere

Goguet

et al. 2017

Phil. Trans. R. Soc. A.

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The combination of non-thermal plasma (NTP) with catalyst systems as an alternative technology to remove NO x emissions in the exhaust of lean-burn stationary and mobile sources is reviewed. Several factors, such as low exhaust gas temperatures (below 300°C), low selectivity to N 2 and the presence of impurities, make current thermally activated technologies inefficient. Various hybrid plasma–catalyst systems have been examined and shown to have a synergistic effect on de-NO x efficiency when compared with NTP or catalyst-alone systems. The NTP is believed to form oxygenated species, such as aldehydes and nitrogen-containing organic species, and to convert NO to NO 2 , which improves the reduction efficiency of N 2 during hydrocarbon-selective catalytic reduction reactions. The NTP has been used as a pretreatment to convert NO to its higher oxidation states such as NO 2 to improve NO x reduction efficiency in the subsequent processes, e.g. NH 3 -selective catalytic reduction. It has been applied to the lean phase of the NO x storage to improve the adsorption capacity of the catalyst by conversion of NO to NO 2 . Alternatively, a catalyst with high adsorption capacity is chosen and the NTP is applied to the rich phase to improve the reduction activity of the catalyst at low temperature. This article is part of a discussion meeting issue ‘Providing sustainable catalytic solutions for a rapidly changing world’.

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“…Secondary plasma reactions will be initiated by dissociated molecules, radicals and ions by radical-molecule reactions and ion-molecule reactions in the downstream afterglow discharge region. Several solutions combined with other processes such as adsorption or wet-type chemical scrubbing have been proposed some which are now at pilot scale plant test [4].…”

Section: Ementioning

confidence: 99%

Non-thermal plasma system for marine diesel engine emissions control

Balachandran

Beleca

Manivannan

et al. 2014

2014 IEEE Industry Application Society Annual Meeting

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Air pollutants generated by ships in both gaseous and particulate forms, have a long term effect on the quality of the environment and cause a significant exposure risk to people living in proximities of harbors or in neighboring coastal areas. It was recently estimated, that ships produce at least 15% of the world's NOx (more than all of the world's cars, buses and trucks combined), between 2.5 -4% of greenhouse gases, 5% black carbon (BC), and between 3-7% of global SO 2 output. Estimation of contribution of maritime shipping to global emissions of VOC and CO is not yet available. In order to reduce the environmental footprint of ships, the International Maritime Organization (IMO) recently issued the legislation of Marpol Annex VI guidelines which implies especially the introduction of, inter alia, stricter sulphur limits for marine fuel in ECAs under the revised MARPOL Annex VI, to 3.50% (from the current 4.50%), effective from 1 January 2012; then progressively to 0.50 %, effective from 1 January 2020, subject to a feasibility review to be completed no later than 2018. The limits applicable in Emission Control Zones (ECAs) for SOx and particulate matter were reduced to 1.00%, beginning on 1 July 2010 (from the original 1.50%); being further reduced to 0.10 %, effective from 1 January 2015. The Tier III controls apply only to the specified ships built from 2016 while operating in Emission Control Areas (ECA) established to limit NOx emissions, outside such areas the Tier II controls apply. The United States and Canada adopted national regulations enforcing IMO Tier III equivalent limits within the North American ECA effective 2016. The US Environmental Protection Agency (EPA) rule for Category III ships, however, references the international IMO standards. If the IMO emission standards are indeed delayed, the Tier III standards would be applicable from 2016 only for US flagged vessels. One of the proposed solutions towards marine diesel emission control is the non-thermal plasma process. We designed and built a nonthermal plasma reactor (NTPR) using a combination of Microwave (MW) and Electron Beam (EB) for treatment of marine diesel exhaust gas. A numerical model has been developed to better understand the marine exhaust gas/plasma kinetics. The reactor modelling and design can sustain 10kW of combined MW and EB power with a gas flow rate of 200l/s. The removal of NOx and SOx was continuously monitored using a portable dual Testo gas analyzer system while all other parameters (MW power, EB power, gas temperature/flow rate, etc.) were remotely recorded & stored through a Labview DAQ system. The reactor performance in NOx and SOx removal will be tested on a 200 kW two stroke marine engine. This study is a part of the DEECON (Innovative After-Treatment System for Marine Diesel Engine Emission Control) FP7 European project.

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A Pilot-Scale Experiment for Total Marine Diesel Emission Control Using Ozone Injection and Nonthermal Plasma Reduction

Cited by 25 publications

References 32 publications

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

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

Non-thermal-plasma-activated de-NO _x catalysis

Non-thermal plasma system for marine diesel engine emissions control

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A Pilot-Scale Experiment for Total Marine Diesel Emission Control Using Ozone Injection and Nonthermal Plasma Reduction

Cited by 25 publications

References 32 publications

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

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

Non-thermal-plasma-activated de-NO x catalysis

Non-thermal plasma system for marine diesel engine emissions control

Contact Info

Product

Resources

About

Non-thermal-plasma-activated de-NO _x catalysis