Storage period prediction and metal compatibility of endothermic hydrocarbon fuels

Zhao, Lin; Zhang, Xiangwen; Pan, Lun; Liu, Jie

doi:10.1016/j.fuel.2018.06.034

Cited by 9 publications

(3 citation statements)

References 23 publications

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“…EHF-1 is mainly composed of alkanes and cycloalkanes (97.7 wt %), and the other components are aromatics. Its main properties are shown in Table . , …”

Section: Methodsmentioning

confidence: 99%

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Influencing Factors of Autoxidation Kinetics Parameters of Endothermic Hydrocarbon Fuels

2019

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Autoxidation kinetics is an important oxidation-stability index of endothermic hydrocarbon fuels. In this work, the autoxidation kinetics of lab-made No. 1 endothermic hydrocarbon fuel (EHF-1, with 25 ppm butylated hydroxytoluene (BHT)) was studied from two aspects of temperature and dissolved oxygen by accelerated oxidation. When the autoxidation kinetic equations are combined with the Arrhenius equation at different temperatures, it is estimated that the storage period of EHF-1 with air isolation at 20 °C is 12.5 years. BHT did not work for the autoxidation chain reaction at low concentration (<5 ppm), but the inhibition is not affected when the oxygen content was low (<50% saturation). In addition, the reaction rate of BHT with oxygen is faster than that of hydrocarbon with oxygen as temperature or oxygen content increases. The difference of reaction rate changed from 0.02 to 17.63 ppm•h −1 when the temperature rose from 70 to 150 °C and changed from 3.28 to 17.63 ppm•h −1 when the oxygen content rose from 25% saturation to 100% saturation. Moreover, the inhibitory effect of BHT on fuel oxidation was still weaker than the promotion of oxygen. On the whole, the oxidation stability of fuels can significantly improve when the oxygen content is below 50% saturation.

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“…EHF-1 is mainly composed of alkanes and cycloalkanes (97.7 wt %), and the other components are aromatics. Its main properties are shown in Table . , …”

Section: Methodsmentioning

confidence: 99%

“…In addition to oxygen, BHT is also able to react with peroxyl radicals. When peroxyl radicals accumulated to a large number, BHT begins to decline rapidly, 33 which limits it reacting with O 2 , and r 2 decreases. Therfore, the difference between r 1 and r 2 gradually decreases with the consumption of [BHT] (Figure 4).…”

Section: Ah O Aoohmentioning

confidence: 99%

Influencing Factors of Autoxidation Kinetics Parameters of Endothermic Hydrocarbon Fuels

2019

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“…Until now, two main types of measurement methods have been used to evaluate the TAN of jet fuels, that is, color indicator titration (acid–base titration) and potentiometric titration methods according to the ASTM D3242 (similar to GB/T 12574) protocol − and ASTM D664 (similar to GB/T 7304) protocol, − respectively. The above methods both use the mixed solution of water, isopropanol, and methylbenzene ( V methylbenzene / V isopropanol / V water = 100:99:1) as the titration solvent to extract the acidic compounds from the jet fuel and then titrated with the standard solution of KOH (RCOOH + KOH → RCOOK + H 2 O and RSH + KOH → RSK + H 2 O).…”

Section: Introductionmentioning

confidence: 99%

Study on the Alternative Solvent of Methylbenzene in the Total Acid Number Titration of Current Jet Fuels

Chen

Jiang²,

Yan

et al. 2022

ACS Omega

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Evaluation of the acidic characteristics of a jet fuel, especially for the total acid number (TAN), is of great significance to ensure flight safety. Methylbenzene is commonly used as the titration solvent; however, it is poisonous and harmful to the environment. It is highly desirable to develop an alternative solvent for methylbenzene to extract the acidic compounds from the jet fuel during the determination of the TAN. Here, we develop a desirable alternative solvent of a mixed ethanol–water solution with the volume ratio of ethanol to water of 99:1, which exhibits a value of TAN similar to that of the solvent of methylbenzene in potentiometric titration and acid–base titration methods. The TAN value derived from the different titration solvents was in the order of 2.96 μg KOH g–1 (V cyclohexane/V isopropanol/V water = 100:99:1) > 2.68 μg KOH g–1 (V methylbenzene/V isopropanol/V water = 100:99:1) ≈ 2.6 μg KOH g–1 (V absolute ethanol/V water = 99:1) > 2.34 μg KOH g–1 (V isopropanol/V water = 99:1). The current report presents a nontoxic and eco-friendly alternative solvent for methylbenzene, which may open up an avenue for evaluating the TAN of jet fuels.

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Enhanced Thermal Oxidation Stability of Jet Fuel by Deoxygenation Treatment

Gong

Jia

Pan

et al. 2020

Chem Technol Fuels Oils

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Storage period prediction and metal compatibility of endothermic hydrocarbon fuels

Cited by 9 publications

References 23 publications

Influencing Factors of Autoxidation Kinetics Parameters of Endothermic Hydrocarbon Fuels

Influencing Factors of Autoxidation Kinetics Parameters of Endothermic Hydrocarbon Fuels

Study on the Alternative Solvent of Methylbenzene in the Total Acid Number Titration of Current Jet Fuels

Enhanced Thermal Oxidation Stability of Jet Fuel by Deoxygenation Treatment

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