Combustion and emission characteristics for a marine low-speed diesel engine with high-pressure SCR system

Zhu, Yuanqing; Xia, Chong; Shreka, Majed; Wang, Zhanguang; Lu, Yuan; Zhou, Song; Hou, Qichen; Ahmed, Salman Abdu

doi:10.1007/s11356-019-04194-2

Cited by 21 publications

(13 citation statements)

References 19 publications

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“…Jayaram and Nigam [154] conducted an experiment on three auxiliary engines on container vessels and reported that SCR reduced the NOx emission factor to 1.4-2.4g/kWh which corresponded to a reduction of 90-91% for HFO and 82-84% for marine distillate oil respectively. Zhu et al [155] reported that the weighted average of NOx with low-sulfur exhaust gas was 3.08 g/kWh, lower than that of the IMO Tier III regulation while NOx with high-sulfur exhaust gas was 4.17 g/kWh, higher than that of the IMO Tier III regulation.…”

Section: Exhaust Aftertreatment 351 De-noxmentioning

confidence: 97%

A review on regulations, current status, effects and reduction strategies of emissions for marine diesel engines

Wang

2020

Fuel

235

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Marine diesel engines, which provide main power source for ships, mainly contribute to air pollution in ports and coastal areas. Thus there is an increasing demand on tightening the emission standards for marine diesel engines, which necessitates the research on various emission reduction strategies. This review covers emission regulations and emission factors (EFs), environmental effects and available emission reduction solutions for marine diesel engines. Not only the establishment of the emission control areas (ECAs) in the regulations but also many experiments show high concerns about the sulfur limits in fuels, sulfur oxides (SOx) and nitrogen oxides (NOx) emissions. Research results reveal that NOx emissions from marine diesel engines account for 50% of total NOx in harbors and coastal regions. Sulfur content in fuel oil is an important parameter index that determines the development direction of emission control technologies. Despites some issues, biodiesel, methanol and liquefied nature gas (LNG) play their important roles in reducing

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Section: Exhaust Aftertreatment 351 De-noxmentioning

confidence: 97%

A review on regulations, current status, effects and reduction strategies of emissions for marine diesel engines

Wang

2020

Fuel

235

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“…Zhu et al. 15–19 has been working on SCR for years and have obtained some satisfactory results. However, detailed change processes, especially in the exhaust flow of marine diesel, cannot be described only using overall reaction pathways, so elementary gas–solid reaction pathways should be coupled to analyze the reaction kinetics of the catalytic process.…”

Section: Introductionmentioning

confidence: 99%

Reaction mechanism and chemical kinetics of NH₃-NO/NO₂-SCR system with vanadium-based catalyst under marine diesel exhaust conditions

Wang

Zhu

Zhou

2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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As one of the most effective NOx emission removing technologies to meet the Tier III limitation by International Maritime Organization, urea-selective catalytic reduction (SCR) technology is starting to be used in two-stroke marine diesel engines. Based on the two-cycle catalytic mechanism proposed by Topsoe, in combination with the exhaust characteristics of the marine diesel, expansion studies on detailed SCR reaction model were carried out in this paper. According to the temperature dependence of reaction pathway, SCR reaction model was divided into three parts: low temperature reaction pathway, standard SCR reaction pathway, and high temperature oxidation pathways, and an expanded NH3-NO/NO2-SCR reaction model for V2O5 catalyst was proposed in the paper. In order to verify the accuracy of the expanded SCR reaction model, simulating and testing studies of SCR reaction under marine diesel conditions were carried out with a commercial extruded V2O5/TiO2 catalyst. The simulation values are agreed well with experimental values at 150–500 ℃, and kinetics characteristics of SCR reaction process under V2O5/TiO2 catalyst can be predicted accurately with the expanded NH3-NO/NO2-SCR reaction model.

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“…It is usually used in combination with other diagnostic methods. The thermodynamic model method [3] [4] [5] collects and analyzes the thermodynamic parameters of marine diesel engine, and judges the operation state of diesel engine according to its changes. At present, the research of this method is mainly through the simulation of the working process of the diesel engine to study the influence of different faults on the performance parameters of the diesel engine.…”

Section: Introductionmentioning

confidence: 99%

A Practical Approach to Detect Faults of Marine Diesel Engine

Qi¹,

Qi²,

Hu³

2020

JCC

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The existing marine diesel engine fault diagnosis methods mainly have the problems of model complexity, large amount of calculation, and unable to carry out real-time fault diagnosis of diesel engine. In this paper, a simple and practical approach to detect faults of marine diesel engine is studied. According to a set of sensing data, the fitting equation of each parameter changing with the running state of diesel engine was fitted statistically. Then, the threshold range of each parameter changing with the running state of diesel engine was fitted. During fault diagnosis, the real-time parameters of the sensor in the current running state were calculated according to the real-time running data. If the parameters exceed the threshold range, it is abnormal operation. Because the sensor signal corresponds to the operation status of each specific component, the abnormal evaluation directly indicates the specific fault. Experimental results show that the method has a good practical effect.

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Combustion and emission characteristics for a marine low-speed diesel engine with high-pressure SCR system

Cited by 21 publications

References 19 publications

A review on regulations, current status, effects and reduction strategies of emissions for marine diesel engines

A review on regulations, current status, effects and reduction strategies of emissions for marine diesel engines

Reaction mechanism and chemical kinetics of NH₃-NO/NO₂-SCR system with vanadium-based catalyst under marine diesel exhaust conditions

A Practical Approach to Detect Faults of Marine Diesel Engine

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Combustion and emission characteristics for a marine low-speed diesel engine with high-pressure SCR system

Cited by 21 publications

References 19 publications

A review on regulations, current status, effects and reduction strategies of emissions for marine diesel engines

A review on regulations, current status, effects and reduction strategies of emissions for marine diesel engines

Reaction mechanism and chemical kinetics of NH3-NO/NO2-SCR system with vanadium-based catalyst under marine diesel exhaust conditions

A Practical Approach to Detect Faults of Marine Diesel Engine

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Product

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Reaction mechanism and chemical kinetics of NH₃-NO/NO₂-SCR system with vanadium-based catalyst under marine diesel exhaust conditions