Reduction of Sulphur in Marine Residual Fuels by Deasphalting to Produce VLSFO

Sultanbekov, Radel; Denisov, Kirill; Zhurkevich, Aleksei Olegovich; Islamov, Shamil

doi:10.3390/jmse10111765

Cited by 17 publications

(7 citation statements)

References 48 publications

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“…2 consists of two components with different bases, paraffin-naphthenic in hydrotreated DF and predominantly aromatic with a high content of asphaltenes in visbreaking residue. Prior studies [66][67][68] have shown that such components show incompatibility, which is confirmed by the results of the experimental study of composition no. 2.…”

Section: Development and Study Of Properties Of The Model Composition...supporting

confidence: 67%

Use of Asphaltene Stabilizers for the Production of Very Low Sulphur Fuel Oil

Zvereva,

Ershov,

Savelenko

et al. 2023

Energies

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Marine fuel oil stability has always been an issue for bunkering companies and ship owners all around the world and the problem has become even more apparent with the introduction of the Global Sulphur Gap by the International Maritime Organization (IMO) in 2020. In this article, the historical background and the technical reasons why marine fuel oils lose their stability, as well as methods for preventing such instability from occurring, are presented. While it is possible to make fuel compositions stable by adjusting their composition in such a way that the components of the fuel are compatible, considering that marine fuel oils are often comprised of the least value-added products, the method of adding special fuel oil stabilizers (also known as “asphaltene dispersants”) is usually preferred. An overview of such stabilizers is presented; their chemical composition, based on the information provided by the manufacturers and/or inventors is studied. In addition, the experimental research of the produced marine fuel oil and its components is carried out. The results of the model composition studies show that adding even as little as 10% of residual asphaltene-rich components can make a composition with a high stability reserve unstable. It was also shown that the content of the asphaltene-rich component in a stable fuel can be increased from 3% to 10% by introducing stabilizers in low amounts (up to 2000 ppm), thus lowering the amount of higher value-added, mostly naphthene-paraffinic-based components. Different methods of fuel stability evaluation were studied and tested, most of them being in correlation with one another. Several types of stability enhancers were tried out on unstable fuel, with stabilizers based on alkylphenol formaldehyde resin showing the best results.

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Section: Development and Study Of Properties Of The Model Composition...supporting

confidence: 67%

Use of Asphaltene Stabilizers for the Production of Very Low Sulphur Fuel Oil

Zvereva,

Ershov,

Savelenko

et al. 2023

Energies

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“…During the study, for each of the cylinders, the maximum combustion pressure p z , the pressure at the end of compression p c , the average indicator pressure p i and the exhaust gas temperature t g were monitored. , … Δt g 8 -deviation of the exhaust gas temperature from the average value in the 1 st , 2 nd , … 8 th cylinders, respectively [39,40].…”

Section: Resultsmentioning

confidence: 99%

Development of method for managing risk factors for emergency situations when using low-sulfur content fuel in marine diesel engines

Sagin,

Sagin

2023

TAPR

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The operation process of marine diesel engines when using fuel with a sulfur content of no more than 0.1 % was chosen as the object of the study. Similar types of fuel are characterized by a lower auto-ignition temperature and higher calorific value. During combustion, this leads to an increase in the rate of fuel combustion and the degree of pressure increase during combustion, precisely because of this, the dynamic loads on the parts of the cylinder-piston group and diesel engine bearings increase. Also, this (due to the increase in temperature at the end of combustion) creates conditions for an increase in the concentration of nitrogen oxides in diesel exhaust gases. This (namely, the change in dynamic and thermal loads that occur during the use of fuels with a reduced sulfur content in marine diesel engines) leads to the occurrence of emergency situations. As a method of managing the risk of such emergency situations, the reconfiguration of the high-pressure fuel equipment, namely the change of the advance angles of the fuel supply, is proposed. The research was carried out on a vessel intended for the transportation of containers and on which a marine diesel engine 8K80ME-8.2-TII MAN-Diesel & Turbo was installed as the main engine. Combustion pressure, the degree of pressure increase during combustion, the temperature of exhaust gases, and the concentration of nitrogen oxides in exhaust gases were chosen as the indicators for evaluating the use and implementation of the proposed method. It has been experimentally proven that this results in an increase in the environmental sustainability of diesel operation by 3.61–10.97 %, an increase in thermal stability – up to 2.54 %, and an increase in dynamic stability – up to 4.82 %. This is due to the shift of the self-ignition and combustion process towards expansion and the corresponding decrease in pressure and temperature at the end of combustion. The most favorable use of this method is on modern diesel engines that have an electronic fuel injection control system, so they do not require mechanical reconfiguration of fuel pumps. Taking this into account, the method based on the change of fuel advance angles is defined as the one that provides management of the risk factors of emergency situations when using low-sulfur fuel in marine diesel engines.

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“…Fuel purification was provided in filters 2, 5, 8. The necessary concentration of FAME B30 biodiesel fuel in its mixture with DMA or RME180 fuel was provided by the dispenser 15 depending on the readings of the flow meter 13 and controlled by the microcontroller 14 [47,48].…”

Section: Methodsmentioning

confidence: 99%

Analysis of methods of managing the environmental safety of the navigation passage of ships of maritime transport

Sagin,

Madey

2023

TAPR

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The requirements of the MARPOL international convention on ensuring the environmental performance of marine diesel engines in relation to the emission of sulfur oxides, as well as marine fuels during navigation passages of sea transport vessels in special ecological areas, are given. The use of scrubber cleaning of exhaust gases and the use of fuel mixtures, which include biodiesel fuel, are considered as methods that meet these requirements. The research was carried out on ships of the Bulker Carrier class with deadweight of 63,246 tons during the navigation transition between the ports of Northern Europe. One of the vessels used scrubber cleaning of exhaust gases as a method of environmental safety management. The other is the use of fuel mixtures, which include biodiesel fuel. Both vessels are equipped with a 5S60ME-C8.2 MAN-Diesel&Turbo marine diesel engine as the main engine, and three 6EY18ALW Yanmar diesel engines as auxiliary engines. The ratio of sulfur oxides to carbon oxides – SO2/CO2 – was chosen as an indicator for evaluating the effectiveness of environmental safety management methods. This value was monitored and regulated by an automatic monitoring system. It was found that both methods meet the requirements of the MARPOL convention, namely, they will support the SO2/CO2 ratio in the range of 2.29–4.17 (when in special environmental control zones) and in the range of 6.46–20.83 (when in outside the zone of special environmental control). The use of environmental safety management methods increases energy costs for ensuring this process. When using exhaust gas scrubbing, additional power losses reach 237–278 kW. In the case of using a fuel mixture that includes biodiesel fuel, power losses amount to 18–20 kW. It has been experimentally confirmed that the use of a fuel mixture that includes biodiesel fuel is characterized by a lower level of environmental sustainability. At the same time, compared to the use of scrubber cleaning of exhaust gases, this method requires less energy consumption and is also characterized by simpler additional equipment. In this regard (and also taking into account that all the requirements of Annex VI MARPOL are provided), it is recommended as the main one to ensure the environmental safety of navigation passages of sea transport vessels.

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Reduction of Sulphur in Marine Residual Fuels by Deasphalting to Produce VLSFO

Cited by 17 publications

References 48 publications

Use of Asphaltene Stabilizers for the Production of Very Low Sulphur Fuel Oil

Use of Asphaltene Stabilizers for the Production of Very Low Sulphur Fuel Oil

Development of method for managing risk factors for emergency situations when using low-sulfur content fuel in marine diesel engines

Analysis of methods of managing the environmental safety of the navigation passage of ships of maritime transport

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