Influence of the hydrocarbon composition of diesel fuels on their performance characteristics

Ivanova, L. V.; Кошелев, В. Н.; Burov, Ekaterina

doi:10.1134/s0965544114060061

Cited by 14 publications

(8 citation statements)

References 1 publication

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“…According to the chemical composition analysis reported in previous studies, the percentage of aromatic compounds in No. 2 ULSD − is roughly 10%–15% (absolute perentage) higher than the petroleum-based jet fuels, − and the major paraffinic molecules constituting No. 2 ULSD have greater carbon numbers (C 12 –C 18 ) than those for the petroleum-based jet fuels (C 8 –C 12 ). , Assuming that ISO 4113 Normafluid can be considered a valid surrogate for commercial No.…”

Section: Resultsmentioning

confidence: 98%

Experimental Measurement of the Isothermal Bulk Modulus of Compressibility and Speed of Sound of Conventional and Alternative Jet Fuels

Boehman

2021

Energy Fuels

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The use of jet fuels in compression–ignition engines with pump–line–nozzle (PLN) fuel injection systems requires consideration of differences in bulk modulus and speed of sound versus diesel fuels, thus requiring thorough characterization of jet fuels before they are applied. In this study, we measured the isothermal bulk modulus of compressibility of three different petroleum-based jet fuels (i.e., POSF 4658, POSF 6169, and POSF 10325) at 313 K (0–4000 psig) and of three different alternative jet fuels (i.e., Farnesane, hydrotreated renewable jet-derived from Camelina (HRJC), and Alcohol-to-Jet (ATJ)) at 308 K (0–4000 psig). Measured isothermal bulk modulus is used to calculate the specific heat ratio of each test fuel by comparing it to the isentropic bulk modulus referenced from previous literature. Measurement results show that the bulk modulus of petroleum-based jet fuels is ∼20%–25% lower than that of the petroleum-based diesel fuel: 984, 932, and 953 MPa for POSF 4658, POSF 6169, and POSF 10325, respectively, at 0.1 MPa. The bulk modulus of Farnesane (982 MPa at 0.1 MPa) was similar to that of petroleum-based jet fuels while those of the other alternative jet fuels were ∼4% (HRJC) and 14% (ATJ) lower than that of the petroleum jet fuels. We also measured the pseudoisothermal speed of sound of these jet fuels using a pair of fuel line pressure sensors installed on the fuel supply line of a diesel engine in a temperature range between 318 K and 338 K. Results showed a lower pseudoisothermal speed of sound for both petroleum-based (1114–1122 m/s at 328 K) and alternative jet fuels (1038–1116 m/s at 328 K) relative to petroleum-based diesel fuel. Isentropic speed of sound estimated by applying the conversion factor to the pseudoisothermal speed of sound measurement showed a similar trend: a lower isentropic speed of sound for jet fuels relative to petroleum-based diesel fuel. This suggested an unintended retarding in the actual fuel injection timing when these jet fuels are used in a CI engine in lieu of regular diesel fuel without the adjustment in nominal fuel injection timing.

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Section: Resultsmentioning

confidence: 98%

Experimental Measurement of the Isothermal Bulk Modulus of Compressibility and Speed of Sound of Conventional and Alternative Jet Fuels

Boehman

2021

Energy Fuels

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“…The average content of i-paraffins in the diesel fuels samples is 18.98% wt. In work [46] by gas-liquid chromatography on a Kristallyuks 4000 M gas chromatograph using a fused silica capillary column, the composition of 9 diesel fuel samples was determined: the content of n-paraffins varies within the range from 9.10% wt. to 14.70% wt., the average content of n-paraffins is 11.98% wt.…”

Section: Methodsmentioning

confidence: 99%

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

Kirgina

Bogdanov

Altynov

et al. 2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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One of the most widely used way to improve low-temperature properties of diesel fuels is the use of additives. However, a variety of additives and the effect of susceptibility make it difficult to select additive for a particular composition of diesel fuel and operating conditions. The laws of interaction between functional groups of additives and hydrocarbons of the diesel fraction have not been investigated yet. The article discusses the influence of fractional, group and structural-group composition of straight-run diesel fuels on the effectiveness of cold flow improvers. The effect of additives concentration on the effectiveness of their action is considered. It was shown that when selecting a cold flow improver for diesel fuel and determining its optimal concentration, it is necessary to take into account the optimal content of various groups of hydrocarbons in diesel fuel, at which a cold flow improver is most effective.

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“…During the past few decades, plentiful efforts have been made on the composition analysis of diesel. The chemical compounds in diesel can be approximately divided into two main categories; , they are paraffin-naphthene hydrocarbons, which constitute about 60%, and arenes, which take up about 40%. The type of paraffin-naphthene hydrocarbons can be further divided into about 30% paraffins and 30% naphthene.…”

Section: Introductionmentioning

confidence: 99%

“…In the chemical structure of naphthenes, the bond angle greatly influences the stability of naphthenes, that is, multiple-member-ring naphthenes are relatively stable, except for cyclopropane (3-member ring) and cyclobutane (4-member ring). In arenes, monocyclic aromatics and bicyclic aromatics take up more than 90%, 25 and the other multicyclic arenes are rarely present. Therefore, the singlecomponent diesel model was not accurate enough in the combustion research of fuel, and the multicomponent diesel model, which includes paraffin, naphthene, monocyclic aromatic, and bicyclic aromatic, should be constructed and utilized in combustion and pyrolysis simulation research of diesel.…”

Section: Introductionmentioning

confidence: 99%

Initial Mechanism and Kinetics of Diesel Incomplete Combustion: ReaxFF Molecular Dynamics Based on a Multicomponent Fuel Model

2019

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This work attempts to investigate the incomplete combustion of a multicomponent fuel model using ReaxFF-MD simulations. The main products of incomplete combustion simulation included H 2 , CO, H 2 O, and CO 2 . Temperatures produced different effects on different products. At lower temperatures, a larger increasing rate of the number of products was found at a later stage, whereas the increasing rate of the number of products would be diminished over time at higher temperatures. The pressure-dependent simulations indicated that the high pressure could promote the combustion process, especially the production of H 2 . The analysis of mechanisms and pathways of the combustion process indicated that the C−C bond dissociation dominated the early stage of the combustion mechanism of paraffin, whereas isomerization, H-abstraction, and C−C bond formation were observed in other systems. Ethylene (C 2 H 4 ) was the product of β-scission of paraffin and naphthene, whereas ethyne (C 2 H 2 ) was the product of β-scission of aromatic structures. A huge fluctuation range was observed in the variation trends of • OH and •• CH 2 , which revealed the high reactivity of these two radicals. Besides, collision was the main reason for the initial formation of coke instead of thermal deposition in the gas phase under extremely high temperatures. This work further suggests that ReaxFF-MD is a promising approach for investigating the combustion behavior of hydrocarbon models at high temperatures.

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Influence of the hydrocarbon composition of diesel fuels on their performance characteristics

Cited by 14 publications

References 1 publication

Experimental Measurement of the Isothermal Bulk Modulus of Compressibility and Speed of Sound of Conventional and Alternative Jet Fuels

Experimental Measurement of the Isothermal Bulk Modulus of Compressibility and Speed of Sound of Conventional and Alternative Jet Fuels

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

Initial Mechanism and Kinetics of Diesel Incomplete Combustion: ReaxFF Molecular Dynamics Based on a Multicomponent Fuel Model

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