Oxidation Stability of Diesel/Biodiesel Fuels Measured by a PetroOxy Device and Characterization of Oxidation Products

Bacha, Kenza; Ben-Amara, Arij; Vannier, Axel; Fortunato, Maira Alves; Nardin, M.

doi:10.1021/acs.energyfuels.5b00450

Cited by 65 publications

(32 citation statements)

References 35 publications

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“…1,14 Recent studies assessing the oxidation stability of diesel and biodiesel blends using a PetroOxy device (according to ASTM D7545-14 29 and EN 16091:2011 30 ) have concluded that the addition of 10% FAME (RME) reduced the induction period of the blend by 2.6 times (at 403 K) in comparison with the baseline B0 diesel fuel, indicating that FAME had a significant detrimental effect on the oxidation stability of the fuel. 11 The PetroOxy test exposes the fuel to an elevated temperature in a pressurised oxygen environment and, despite the findings related to the variations in the stability of B0 and B10 fuels, it is not clear whether these differences are also observed in real-world operating conditions within a vehicle fuel injection system. The main direct impact of FAME oxidation on the engine operability is not generally the change in the fuel properties but rather solid deposition.…”

Section: Effect Of Fame On Fuel Degradationmentioning

confidence: 99%

“…It also provided flexibility in the operating conditions and offered the possibility to study fuel kinetic oxidation and to perform successive oxidation runs on the same sample. 11…”

Section: Introductionmentioning

confidence: 99%

“…It also provided flexibility in the operating conditions and offered the possibility to study fuel kinetic oxidation and to perform successive oxidation runs on the same sample. 11 Although most FAME studies have been carried out in non-representative chemical laboratories, 12 some recent studies have assessed the impact of biodiesel blends directly on the fuel injection equipment (FIE). 13 For example, by heating the fuel and by returning the injected fuel to the fuel tank, rapid degradation was observed to occur.…”

Section: Introductionmentioning

confidence: 99%

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Factors affecting diesel fuel degradation using a bespoke high-pressure fuel system rig

Gopalan

Smith²,

Pickering

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Recently, there has been automotive-industry-wide impetus to reduce the overall diesel vehicle emissions and the fuel consumption by increasing the fuel injection pressure within common-rail systems. Many production fuel injection systems are now capable of delivering rail pressures of 1800–2000 bar, with those able to achieve 3000 bar under development. In addition, there has been a gradual increase in the permitted fatty acid methyl ester content in EN 590 diesel from 5% to 7% with further increases to 10% proposed. With these changes, there has been mounting speculation that increasing the injection pressure, particularly with an elevated biodiesel content, can contribute to fuel degradation, deposit formation, fuel filter blocking and corresponding vehicle reliability issues. In this investigation, a bespoke high-pressure fuel injection rig was designed and commissioned to mimic conditions representative of those experienced within a modern vehicle engine. The impacts of the rail pressure, the biodiesel content and the accelerated testing conditions on the stability of the diesel fuel and deposit formation leading to filter blocking were assessed. Despite the abundance of literature on laboratory-based biodiesel degradation, in these more realistic operating conditions it was found that biodiesel did not increase the likelihood of deposit formation within the high-pressure fuel system, with the same level of filter blocking observed for both the baseline diesel B0 (i.e. no biodiesel) and the B10 blend (which contains 10% biodiesel). This implies that the filter-blocking problem caused by onboard fuel degradation has the potential to occur broadly in a wide range of different fuel compositions. B10 fuel tested with a rail pressure of 2000 bar resulted in a pressure drop across the fuel filter of 0.5 bar within 12,000 min (approximately 8.3 days), whereas the corresponding experiment at a rail pressure of 1000 bar showed no increase in the filter pressure. When using model (B10) fuel, filter blocking was observed at rail pressures of both 2000 bar and 1000 bar, but with a lower pressure at a much reduced rate, leading to the belief that the increases in the rail pressure towards 2000 bar has a significant effect on the propensity of vehicle diesel filters to block. Measures taken to increase the severity of the test, such as recirculating injected fuel to simulate shear effects, were found to increase the rate of degradation but did not change the chemical composition of the solids formed, thus implying that they were valid methods of reducing the test duration without introducing new degradation mechanisms. The rig presented here is therefore a suitable accelerated testing system for assessing the behaviour of fuels at higher pressures that will be common throughout the global diesel fleet in the near future.

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Section: Effect Of Fame On Fuel Degradationmentioning

confidence: 99%

“…It also provided flexibility in the operating conditions and offered the possibility to study fuel kinetic oxidation and to perform successive oxidation runs on the same sample. 11…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Factors affecting diesel fuel degradation using a bespoke high-pressure fuel system rig

Gopalan

Smith²,

Pickering

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…3 Bacha et al have investigated that the monitoring of biodiesel oxidative degradation should be mainly conducted by Fourier transform infrared spectroscopy (FTIR); the absorption peak around 1745 cm À1 is due to presence of an ester carbonyl group. 4 Faragun et al have observed that the correlation between concentration and FTIR absorption is highly linear (R 2 above 0.993, in most cases 0.999). 5 Shimamoto & Tubino have studied the presence of conjugated dienes in an oxidized biodiesel using UV-vis spectroscopy and found a positive correlation between the peroxide value and UV absorbance.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the performance and emission and spectroscopic analysis of an improved soy methyl ester

Hasnain

Sharma

2019

RSC Adv.

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“…The technique is mainly for automotive fuels (ASTM D7545) in order to study the oxidation stability of the component. 13,21−24 RSSOT oxidation provides a fast determination of the amount of oxygen consumed through the measurement of the total pressure inside the autoclave reactor (PetroOxy).…”

Section: Introductionmentioning

confidence: 99%

New Approach for Understanding the Oxidation Stability of Neopolyol Ester Lubricants Using a Small-Scale Oxidation Test Method

et al. 2018

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This work presents, for the first time, the evaluation on the oxidation stability of synthetic oils for an aircraft engine using the rapid small-scale oxidation test (RSSOT) method. Polyol ester lubricants with and without additives were oxidized at 423 K and 7 bar. The pressure drop plots show that during the first period of thermal degradation, the consumption of oxygen is similar for both samples. This part corresponds to the initiation steps of the mechanism of oxidation. Then, the curve of the oil without additives reveals an increase in the depletion of oxygen, corresponding to the kinetic propagation step. Because of the presence of antioxidants, this phase is not observed for oil-containing additives. The RSSOT method also allows us to quantify the time needed for the ester base to produce enough free radicals in order to propagate the mechanism of oxidation. A methodic comparison with other samples containing the raw oil and one additive is also proposed.

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Oxidation Stability of Diesel/Biodiesel Fuels Measured by a PetroOxy Device and Characterization of Oxidation Products

Cited by 65 publications

References 35 publications

Factors affecting diesel fuel degradation using a bespoke high-pressure fuel system rig

Factors affecting diesel fuel degradation using a bespoke high-pressure fuel system rig

Evaluation of the performance and emission and spectroscopic analysis of an improved soy methyl ester

New Approach for Understanding the Oxidation Stability of Neopolyol Ester Lubricants Using a Small-Scale Oxidation Test Method

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