Studying the impact of different additives on the properties of straight-run diesel fuels with various hydrocarbon compositions

Kirgina, Maria; Bogdanov, Ilya; Altynov, Andrey; Belinskaya, Nataliya; Орлова, Алина; Nikonova, N.O.

doi:10.2516/ogst/2021018

Cited by 7 publications

(11 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The obtained results do not conflict with the data presented in [9][10][11]25,26]. Table 8 shows the average effectiveness of DAs at various concentrations in relation to the CFPP and Tp of DF samples of various compositions.…”

Section: Composition and Characteristics Of Df Samplessupporting

confidence: 64%

“…The additive effectiveness, in addition to the composition of the fuel, is also affected by the concentration at which the depressant is used and at what temperature it is added into the fuel. The content of n-paraffins also has the greatest influence on the low-temperature characteristics of diesel fuel, since they are the first to crystallize when the temperature goes down [25,26].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ways to Improve the Effectiveness of Depressant Additives for the Production of Winter and Arctic Diesel Fuels

Bogdanov,

Morozova,

Altynov

et al. 2024

Resources

Self Cite

View full text Add to dashboard Cite

Diesel fuel is the main fuel for transport and power generation for remote areas, especially the Arctic. For these territories, it is important to produce low-freezing fuel grades. The most effective way to improve the low-temperature properties of diesel fuels (cloud point, pour point, and cold filter plugging point) is the use of depressant additives. Existing research shows that the depressant additives’ effectiveness is influenced by many factors. The most important factors are diesel fuel composition, additive concentration, and the temperature of additive introduction into the fuel (adding temperature). The purpose of this work is to find ways to increase the efficiency of depressant additives for the production of low-freezing diesel fuels by choosing the most effective additive concentration and adding temperature for fuels of various compositions. During the work, low-temperature properties were determined and the effectiveness of three depressant additives was assessed on four samples of diesel fuel at four concentrations (0.5, 1.0, 2.0, and 5.0 c.u., where c.u. (conditional unit) is the concentration recommended by the manufacturer of the additives). In addition, low-temperature properties for blends of six depressant additives and two samples of diesel fuel at five adding temperatures (15, 25, 35, 45, and 55 °C) were determined. In this work, in contrast to existing works, it was established for the first time that the composition of the fuel affects not only the depressant additives effectiveness, but also the dependence of the additive effectiveness on the concentration in which it is used. It is shown that the higher the content of paraffins in the composition of the diesel fuel, the less the depressant additive’s effectiveness in relation to cold filter plugging point depends on the concentration and the more the depressant additive’s effectiveness in relation to the power point depends on the concentration. An inverse relationship was revealed for the content of aromatic hydrocarbons in diesel fuel. It was also found for the first time that an increase in the adding temperature of depressant additives up to 35–55 °C enhances the effectiveness of their action in relation to the cold filter plugging point (maximum at 6–7 °C). It is shown that the greater additive effect on the cold filter plugging point of the diesel fuel, the more strongly the depressant effectiveness depends on the adding temperature. The work provides recommendations for obtaining the most low-freezing classes of fuel based on the samples considered. The regularities identified in the work will make it possible, depending on the composition of the fuel, to select the optimal concentration of the additive and the temperature of its adding, which will increase the efficiency of the additives, as well as the volume of low-freezing grades of diesel fuel production.

show abstract

Section: Composition and Characteristics Of Df Samplessupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Ways to Improve the Effectiveness of Depressant Additives for the Production of Winter and Arctic Diesel Fuels

Bogdanov,

Morozova,

Altynov

et al. 2024

Resources

Self Cite

View full text Add to dashboard Cite

show abstract

“…This additive was selected on the assumption that sludge formation is one of the leading indicators of fuel degradation. It is, however, challenging to choose the additive for a particular diesel fuel to achieve the expected fuel stability [ 79 ]. The standard volume of fuel samples was 100 mL, while the additive capacity was 1 mL.…”

Section: Diesel Fuels For Experimentsmentioning

confidence: 99%

Automotive Diesel Fuel Internal Stability Testing with the Use of UV and Temperature as Degradation Factors

2022

View full text Add to dashboard Cite

Diesel fuel stability can be considered from many points of view, of which the two considered most important are stability in contact with the environment and internal stability. Fuel stability in touch with the environment is often defined as oxidation stability, of which measurement procedures are well developed. The presented paper shows that fuel’s internal stability can also be important. The internal stability of diesel fuel with the local use of thermal and ultraviolet radiation (UV) as degradation factors and fluorescence signals as a probe is presented in this paper. We show that the internal degradation of fuel with temperature use differs from that with UV and simultaneous both factors use. Our study shows that using temperature as a degradation factor introduces significant fluorescence fading. Moreover, the fluorescence signal restores significantly later than the sample stabilizes at room temperature. The novelty proposed based on examination is hybrid degradation and an examination cycle that enables the simultaneous use of degradation factors and fluorescence reading. For this purpose, a dedicated measurement setup of signal control and processing was constructed and programmed. The measurement procedure of the data series for specific wavelength enables calculation of signal shifts that allow the internal stability classification of diesel fuel samples in less than 30 min with the cost of a single disposable capillary probe and one polymer plug. Premium and regular fuel examination results show that internal fuel stability can be related to polycyclic aromatic hydrocarbons (PAH) concentrations and can be modified with dedicated additives.

show abstract

“…Использование депрессорных присадок (ДП) в дизельных топливах (ДТ) является одним из наиболее экономически целесообразных методов улучшения их низкотемпературных свойств [1][2][3][4][5][6]. Депрессорные присадки повышают такие показатели качества ДТ, как текучесть (температура застывания), температура помутнения и предельная температура фильтруемости (ПТФ).…”

Section: Introductionunclassified

“…Следовательно, температура плавления является комплексной характеристикой депрессорных присадок и косвенно учитывает их молекулярную массу, природу и содержание в них полярной части [11][12][13]. Полярная часть присадок определяет их межмолекулярные взаимодействия с н-алканами с образованием ассоциированных комплексов в предкристаллизационной области ДТ и в процессе формирования структуры и формы кристаллов парафина [4,[9][10][11][12].…”

Section: Introductionunclassified

Influence of physicochemical properties of depressor additives on their performance in diesel fuels

Yakovlev

Агаев

2023

Izvestiâ vuzov. Prikladnaâ himiâ i biotehnologiâ

View full text Add to dashboard Cite

The work investigates the influence of the physicochemical properties of depressor additives on their performance in diesel fuels of various chemical and fractional compositions. Heavy, summer and marine diesel fuels were used. The following physicochemical properties of fuels were determined: cloud point, freezing point, density, viscosity, fraction composition and hydrocarbon content that formed a complex with carbamide. The content and molar mass distribution of individual n-alkanes in diesel fuels were determined. The following foreign depressant-dispersing additives were used: Dodiflow with codes 4971, 5416, 5817 and 7118, Keroflux with codes 3501, 5696a and Ofi-8863. Their active agents were isolated from the commercial additives by dialysis using semi-permeable rubber membranes. The dropping point of the active agents, their intrinsic viscosity in kerosene and the refractive index at 100 °C were identified. The content of vinyl acetate components and the degree of branching of aliphatic radicals of depressor additives were determined using infrared spectroscopy of the active agents. The relationship between the physicochemical properties of depressor-dispersing additives and their performance in diesel fuels was established. Additives characterised by a relatively high melting point, an average intrinsic viscosity and low branching of aliphatic compounds in the polymer structure exhibit the best performance in fuels. The consumption of additives to achieve the maximum depression of freezing point decreases with the transition from summer to marine fuel and further to heavy diesel fuel. A complex tкп / СВА value, comprising the ratio of the dropping points tкп and the content of vinyl acetate components in the additives, was proposed as a means of predicting the efficiency of depressant additives СВА. In the range of tкп / СВА values of 3.02–4.00 the additives have universal depressant properties. A correlation was established between the refractive index nD100 of additives and the complex value tкп / СВА (R2 = 0.975).

show abstract

Studying the impact of different additives on the properties of straight-run diesel fuels with various hydrocarbon compositions

Cited by 7 publications

References 36 publications

Ways to Improve the Effectiveness of Depressant Additives for the Production of Winter and Arctic Diesel Fuels

Ways to Improve the Effectiveness of Depressant Additives for the Production of Winter and Arctic Diesel Fuels

Automotive Diesel Fuel Internal Stability Testing with the Use of UV and Temperature as Degradation Factors

Influence of physicochemical properties of depressor additives on their performance in diesel fuels

Contact Info

Product

Resources

About