An improved kinetic model for deposition by thermal oxidation of aviation hydrocarbon fuels

Liu, Zhiqiang; Tang, Shaokun; Li, Zaizheng; Qin, Zhizhen; Yuan, Shiyu; Wang, Limin; Wang, Li; Zhang, Xiangwen; Liu, Guozhu

doi:10.1016/j.fuel.2019.116139

Cited by 29 publications

(11 citation statements)

References 29 publications

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“…The total weight of deposited carbon is 16.5 mg. The appearance of multiple deposit peaks may result from the existence of nonhindered phenols or other heteroatomic species in the fuel. , It can be seen that dispersant #2 exhibits the best performance: there is only one small peak left at around 1.35 m along the tube and the total carbon deposition is reduced to 2.5 mg, which means dispersant #2 has 84.6% antideposition efficiency under these experimental conditions. Dispersant #1 also exhibits good performance: with 6.3 mg carbon deposit in total, and both peaks at 0.95 and 1.35 m are obviously decreased.…”

Section: Resultsmentioning

confidence: 89%

Synthesis and Performance of a Series of Polyisobutylene-Substituted Succinic Acid Ester Dispersants for Reducing Thermal Oxidation Deposition of Jet Fuel

et al. 2020

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The thermal oxidation deposition of jet fuel is of great concern for the advanced fuel-cooled thermal management technologies of advanced aircraft and could be solved by many methods in which pre-adding dispersants is the most economical and efficient way. In this paper, a series of new ester-type dispersants were synthesized from polyisobutylene-substituted succinic acid (PIBSA) and polyglycerol. The polyisobutylene-substituted succinic acid ester (PIBSAE) dispersants were characterized by Fourier transform infrared (FT-IR) and gel permeation chromatography (GPC), and their anti-deposition performances in Chinese jet fuel (RP-3) were determined by an electrically heated tube test and Jet Fuel Thermal Oxidation Stability test (JFTOT). The structure and performance of the dispersant were greatly influenced by the molar ratio of PIBSA to polyglycerol and the degree of polymerization of polyglycerol in the reactant. The dispersant synthesized from PIBSA with triglycerol at a 1:1 molar ratio, which not only has a moderate total hydroxyl value but also contains sufficient poly-PIBSAE molecules with moderate molecular weight, showed the best performance in the electrically heated tube test by reducing 84.6% of the thermal oxidation deposit of a commercial RP-3. Furthermore, JFTOT at 355 °C also showed that this dispersant can greatly reduce the deposit of low-quality jet fuel by decreasing the deposit rating from >4 to 1 and the maximum differential pressure from 2.10 to 0.20 kPa.

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Section: Resultsmentioning

confidence: 89%

Synthesis and Performance of a Series of Polyisobutylene-Substituted Succinic Acid Ester Dispersants for Reducing Thermal Oxidation Deposition of Jet Fuel

et al. 2020

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“…Unfortunately, the necessary data to formulate the chemical kinetic pathways and rates of such reactions are not currently available. Initial efforts on alternative deposition model pathways have been reported recently . This would be a fruitful research area for future work.…”

Section: Resultsmentioning

confidence: 99%

“…Initial efforts on alternative deposition model pathways have been reported recently. 24 This would be a fruitful research area for future work.…”

Section: Methodsmentioning

confidence: 98%

Studies of the Impact of Fuel Deoxygenation on the Formation of Autoxidative Deposits

et al. 2020

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The formation of gums and surface deposits in aircraft fuel systems is known to be caused by oxidative reactions, which occur at elevated temperatures as jet fuel is used as a coolant, or by passive heating during passage through hot engine sections. In this work, we explore the effect of fuel deoxygenation levels on oxidation processes and autoxidative surface deposit formation via experimental and modeling approaches. Experimental measurements of oxygen consumption and deposition are performed over a range of initial oxygen levels in the near-isothermal flowing test rig (NIFTR) heated tube rig and quartz crystal microbalance (QCM) batch reactor systems. In addition, computational fluid dynamic (CFD) simulations, which include an autoxidative chemical kinetic mechanism, are used to help understand the effect of deoxygenation at partial and complete oxygen consumption conditions. The results indicate that under partial oxygen consumption conditions (i.e., high flow rates and relatively low temperatures) deoxygenation may have a significantly reduced effectiveness in eliminating deposit formation unless very high levels of deoxygenation are attained. Conversely, during complete (or nearly complete) oxygen consumption conditions (i.e., low flows and high temperatures) deoxygenation can be very effective. The results show that to be effective under all oxygen consumption conditions, one needs to deoxygenate to a lower level than the amount of oxygen consumed (e.g., 10% oxygen consumption requires deoxygenation to less than 10% of the initial oxygen level). The effect of deoxygenation is a complex function of conditions, such as temperature, flow, and oxygen consumption level, and this work points to the need for careful consideration of these conditions when employing fuel deoxygenation.

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“…In this study, the proposed value of the A-factor of peroxide species formation of 3 × 10 12 cm 3 ⋅mole −1 ⋅s −1 . This value was also used by Liu et al (2019) for modelling the deposition formation in the thermal oxidation of aviation kerosene.…”

Section: Mechanism Optimisationmentioning

confidence: 99%

“…More recent studies have updated the reaction rate parameters of the model as well as the validation against experimental data. Liu et al (2019) updated the reaction mechanism of jet fuel autoxidation, and it has been accurately validated with the deposition formation from their experiment. An accurate kinetic model provides detailed insight and identification of important parameters of the autoxidation process for fuel design optimisation (Malani et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Assessment of ethanol autoxidation as a drop-in kerosene and surrogates blend with a new modelling approach

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et al. 2021

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An improved kinetic model for deposition by thermal oxidation of aviation hydrocarbon fuels

Cited by 29 publications

References 29 publications

Synthesis and Performance of a Series of Polyisobutylene-Substituted Succinic Acid Ester Dispersants for Reducing Thermal Oxidation Deposition of Jet Fuel

Synthesis and Performance of a Series of Polyisobutylene-Substituted Succinic Acid Ester Dispersants for Reducing Thermal Oxidation Deposition of Jet Fuel

Studies of the Impact of Fuel Deoxygenation on the Formation of Autoxidative Deposits

Assessment of ethanol autoxidation as a drop-in kerosene and surrogates blend with a new modelling approach

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