Green shipping: Marine engine pollution abatement using a combined catalyst/seawater scrubber system. 1. Effect of catalyst

Boscarato, Ilan; Hickey, Neal; Kašpar, Jan; Prati, Maria Vittoria; Mariani, Antonio

doi:10.1016/j.jcat.2014.12.013

Cited by 30 publications

(17 citation statements)

References 56 publications

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“…The installation of both SCR and scrubber systems onboard ships could represent a reliable technical solution to satisfy the limits imposed on both NOx and SOx emissions; however, this solution is hardly applicable because of space limitations, especially for existing ships [10]. Indeed, pollution control devices are usually installed in the funnel and are often large in size, so integrating such systems with other exhaust line components, such as silencers, becomes mandatory in order to save space [1].…”

Section: Introductionmentioning

confidence: 99%

Green Shipping—Multifunctional Marine Scrubbers for Emission Control: Silencing Effect

et al. 2021

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Scrubber systems abate the sulphur oxide emissions of engines when cheap fuel oils that are high in sulphur content are employed as combustibles. However, the ships with these voluminous devices installed on board is space demanding. This work analyses the feasibility of incorporating the acoustic abatement of the exhaust gas noise functionality into the scrubber design to provide a combined scrubber–silencer system. For this purpose, a finite element analysis is performed on a simple expansion chamber, which is assessed using both analytical and experimental data. The transmission loss is the acoustic parameter chosen in this work. The numerical model depicts a good correlation with the transmission loss measured on a model scale scrubber. Finally, scrubber geometry modifications alter the transmission loss, changing and/or enhancing its featuring. These abilities indicate the feasibility to confer to scrubber silencing effects.

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Section: Introductionmentioning

confidence: 99%

Green Shipping—Multifunctional Marine Scrubbers for Emission Control: Silencing Effect

et al. 2021

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“…Though the NO x , SO x and particulate matter emissions can be reduced significantly with LNG, the GHG saving offered by LNG is limited to no more than 21%, and methane slips could potentially cancel out the benefit (Brynolf et al, 2014;Thomson et al, 2015;Ekanem Attah and Bucknall, 2015). Ships operating within Emissions Control Areas have adopted exhaust gas treatment devices which could potentially lead to the GHG emission performance being even worse as a consequence of the requirement for additional power and the negative impacts on engine efficiency (Verschaeren et al, 2014;Di Natale and Carotenuto, 2015;Boscarato et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Hybrid fuel cell and battery propulsion system modelling and multi-objective optimisation for a coastal ferry

Bucknall

2020

International Journal of Hydrogen Energy

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Efforts from all sectors of society including the shipping industry are needed to limit the overall global temperature rise to within 2 • C of pre-industrial levels by 2050. The hybridisation of Proton Exchange Membrane Fuel Cells (PEMFC) and Lithium-ion batteries for coastal ship propulsion systems may potentially offer beneficial emission performance. However, such hybrid systems are constrained by power and energy density limitations, lifetime; and costs as well as life-cycle emissions of alternative fuel/energy. There is a lack of holistic design methodology dealing with these uncertainties in the literature. This paper proposes a holistic design methodology for coastal hybrid ships based upon a developed model. The power source sizing problem is solved using constrained mixed-integer multi-objective optimisation in the external layer. The global optimum energy management strategies for an averaged operating profile are obtained from deterministic dynamic programming in the inner layer, while considering power source degradations in the sizing algorithm. The proposed methodology was applied to a coastal ferry to investigate the feasibility and benefit potential of adopting the hybrid PEMFC and battery propulsion system in Matlab. The case studies indicate that the proposed propulsion system can achieve at least a 65% life-cycle greenhouse gas reduction for the considered two cases.

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“…The improvement of fuel injection in these engines has been investigated [4]. To reduce NO x emissions in O 2 -rich environments, selective catalytic reduction (SCR) using urea solution or ammonia has been utilized [5][6][7][8][9][10][11]. Some methods combine SCR with nonthermal plasma (NTP) [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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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Green shipping: Marine engine pollution abatement using a combined catalyst/seawater scrubber system. 1. Effect of catalyst

Cited by 30 publications

References 56 publications

Green Shipping—Multifunctional Marine Scrubbers for Emission Control: Silencing Effect

Green Shipping—Multifunctional Marine Scrubbers for Emission Control: Silencing Effect

Hybrid fuel cell and battery propulsion system modelling and multi-objective optimisation for a coastal ferry

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

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