A review of NOx and SOx emission reduction technologies for marine diesel engines and the potential evaluation of liquefied natural gas fuelled vessels

Deng, Jiaojun; Wang, Xiaochen; Wei, Zhilong; Wang, Li; Wang, Chenyu; Chen, Zhenbin

doi:10.1016/j.scitotenv.2020.144319

Cited by 173 publications

(58 citation statements)

References 174 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second impact of adding exhaust gases to the intake mixture is the increase in specific heat, which causes the flame temperature to decrease [15]. This arrangement between the reduced oxygen content and the reduced flame temperature dampens the rate of NO formation [16]. Figure 5 shows the evolution of pressure with the crank angle for EGR fractions from Figures 5 and 6, indicating the variation of pressure and temperature with 5%, 10%, 15%, 20%, and 25% of EGR.…”

Section: Effect Of Egrmentioning

confidence: 99%

Eﬀect of EGR on Performances and Emissions of DI Diesel Engine Fueled with Waste Plastic Oil: CDF Approach

Naima¹,

Menni²,

Alliche³

et al. 2021

ACSM

View full text Add to dashboard Cite

Recently, there is an increasing interest in the pyrolysis of waste plastic into usable fuel as a friendly environment method for waste plastic disposal. The existing literature from various studies stated that the major problem related to the use of WPO in diesel engines is the high NOx emissions level. This paper aims to remedy this problem by suggesting the best EGR percentage with the advanced optimum injection timing. Primary, 5 EGR percentage fractions are considered: 0%, 5%, 15%, 20% and 25% percent. The results showed that 25% is the best percentage regarding emissions. However, a signiﬁcant reduction in mean in-cylinder pressure, temperature, and heat release rate was depicted with the EGR fraction increase. Injection timing is advanced to recoup the decrease in performance. The results showed that 25% of EGR and advanced injection timing by 5 degrees would be better for performances and emissions of DI diesel engine while running with waste plastic oil as an alternative fuel.

show abstract

Section: Effect Of Egrmentioning

confidence: 99%

Eﬀect of EGR on Performances and Emissions of DI Diesel Engine Fueled with Waste Plastic Oil: CDF Approach

Naima¹,

Menni²,

Alliche³

et al. 2021

ACSM

View full text Add to dashboard Cite

show abstract

“…Issues such as greenhouse gases, sulfur oxides, nitrogen oxides, and fine dust emitted by ships are emerging as environmental pollution problems [4]. Accordingly, the International Maritime Organization (IMO) is restricting greenhouse gas and air pollutant emissions by revising the Marine Pollution Treaty (MARPOL Annex VI) to strengthen international marine and air pollution regulations [5]. The IMO has implemented greenhouse gas reduction regulations since 2013 and aims to reduce greenhouse gas emissions by 30% by 2025 compared to the present in stages [6].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Design of DC Shipboard Power Systems for Pure Electric Propulsion Ship Based on Battery Energy Storage System

Kim

Jung

et al. 2021

Energies

View full text Add to dashboard Cite

With the strengthening of international environmental regulations, many studies on the integrated electric propulsion systems applicable to eco-friendly ship are being conducted. However, few studies have been performed to establish a guide line for the overall pure electric propulsion ship design. Therefore, this paper introduces the comprehensive design of DC shipboard power system for pure electric propulsion ship based on battery energy storage system (BESS). To design and configure the pure electric propulsion ship, 2 MW propulsion car ferry was assumed and adopted to be the target vessel in this paper. In order to design the overall system, a series of design processes, such as the decision of the ship operation profile, BESS capacity selection, configuration of the power conversion systems for propulsion, battery charging/discharging procedures, classification of system operation modes, and analysis of the efficiency, were considered. The proposed efficient design and analysis of the pure electric propulsion ship was qualitatively and quantitatively validated by MATLAB Simulink tool. The methodology presented in this paper can help design real ships before the system commissioning.

show abstract

“…The combustion of fossil fuels in power plants, boilers and diesel engines are known to generate large amounts of air pollutants in the form of sulphur oxides (SOx) and nitrogen oxides (NOx), amongst other polluting 2 substances. Control of these pollutants are particularly more challenging in the marine sector where ocean-plying ships with large diesel engines depend on low-cost heavy fuel oil for propulsion (Deng et al 2021;Lloyd's Register 2015). The application of known land-based end-of-pipe technologies on-board ocean-plying vessels faces many constraints, including space, weight and logistical limitations.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, engine medication techniques are mainly used to reduce the combustion temperature in the engine so that less NOx will be formed. However, such methods also reduce the engine efficiency, thereby leading to higher fuel consumption (Deng et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Comparison of various chemical compounds for the removal of SO2 and NOx with wet scrubbing for marine diesel engines.

Chin

Tam

Yin

2021

Preprint

View full text Add to dashboard Cite

Seawater, NaOH, NaClO, NaClO2, H2O2 and KMnO4 were used as scrubbing liquids to react with SOx and NOx separately in a customized wet scrubber. The absorption of SO2 in the aqueous phase was influenced by three factors: pH, ionic concentration and oxidation potential. For NOx removal, the effectiveness of various chemical compounds can be ranked from least to most effective as follows: Seawater, NaOH, H2O2 < NaClO < KMnO4 < NaClO2. This effectiveness was influenced by the chemical compound’s ability to oxidize NO to NO2, absorb the NO2 that was formed and retaining the nitrogen in the aqueous phase. High oxidation potential promoted the oxidation of NO to NO2 but hindered the absorption of NO2. NaClO2 was superior compared to NaClO in all three categories of oxidizing, absorption and retention. NaClO could not retain a significant amount of NO2 which it absorbed in the aqueous phase. The pH around 8 provided a good balance between oxidation versus absorption/retention and reactant utilization for the chlorine-based oxidants. KMnO4 had the lowest reactant consumption rate; only half a mole was consumed for every mole of NO removed, compared to around 2–3 moles of chlorite or 3–5 moles of hypochlorite.

show abstract

A review of NOx and SOx emission reduction technologies for marine diesel engines and the potential evaluation of liquefied natural gas fuelled vessels

Cited by 173 publications

References 174 publications

Eﬀect of EGR on Performances and Emissions of DI Diesel Engine Fueled with Waste Plastic Oil: CDF Approach

Eﬀect of EGR on Performances and Emissions of DI Diesel Engine Fueled with Waste Plastic Oil: CDF Approach

Comprehensive Design of DC Shipboard Power Systems for Pure Electric Propulsion Ship Based on Battery Energy Storage System

Comparison of various chemical compounds for the removal of SO2 and NOx with wet scrubbing for marine diesel engines.

Contact Info

Product

Resources

About