Analysis of Polar Species in Jet Fuel and Determination of Their Role in Autoxidative Deposit Formation†

2006 ◽  
Vol 20 (6) ◽  
pp. 2564-2571 ◽  
Author(s):  
Lori M. Balster ◽  
Steven Zabarnick ◽  
Richard C. Striebich ◽  
Linda M. Shafer ◽  
Zachary J. West
Keyword(s):  
Jet Fuel ◽  
Deposit Formation ◽  
Polar Species

scholarly journals Determination of low-level biogenic gasoline, jet fuel, and diesel in blends using the direct liquid scintillation counting method for 14C content

Fuel ◽  
2021 ◽  
Vol 291 ◽  
pp. 120084
Author(s):  
Charles G. Doll ◽  
Andrew E. Plymale ◽  
Alan Cooper ◽  
Igor Kutnyakov ◽  
Marie Swita ◽  
...  
Keyword(s):  
Liquid Scintillation Counting ◽  
Liquid Scintillation ◽  
Jet Fuel ◽  
Scintillation Counting ◽  
Counting Method ◽  
Low Level

scholarly journals Research on the Influence of Cosolvent on the Determination of the Contamination Degree of Jet Fuel

ACS Omega ◽  
2020 ◽  
Vol 5 (21) ◽  
pp. 12184-12190 ◽  
Author(s):  
Ji-Xin Mao ◽  
Quan-Xi Zheng ◽  
Xin Xu ◽  
Li Guo ◽  
Shi-Zhao Yang ◽  
...  
Keyword(s):  
Jet Fuel ◽  
Contamination Degree

Determination of phenolic antioxidants in aviation jet fuel

2000 ◽  
Vol 871 (1-2) ◽  
pp. 235-241 ◽  
Author(s):  
M Bernabei ◽  
G Bocchinfuso ◽  
P Carrozzo ◽  
C De Angelis
Keyword(s):  
Jet Fuel ◽  
Phenolic Antioxidants

Use Differential Pulse Voltammetry for Determining the 2,6-Ditertbutyl-4-Methylphenol in Jet Fuels

2012 ◽  
Vol 455-456 ◽  
pp. 716-720 ◽  
Author(s):  
Yong Gang Shi ◽  
Bin Su ◽  
Hai Feng Gong ◽  
Yan Xue
Keyword(s):  
Differential Pulse Voltammetry ◽  
Standard Addition ◽  
Differential Pulse ◽  
Jet Fuel ◽  
Jet Fuels ◽  
Addition Method ◽  
Electrolytic Solution ◽  
Voltammetric Characteristics ◽  
Pulse Voltammetry

A new method for determination of antioxidants in jet fuels, which is based on the differential pulse voltammetric characteristics of the antioxidant 2,6-ditertbutyl-4-methylphenol in the solution of saturated KOH anhydrous ethyl alcohols, is established. The experimental results have shown that there is a linear relationship between the content of 2,6-ditertbutyl-4-Methyl-phenol in the jet fuel and the differential pulse voltammetry response in the electrolytic solution. It has also been shown that the antioxidant contents can be reliably and simply determined with the help of the standard addition method. The largest relative error of the determination is 6.70 %, the biggest confidence for 5 samples is 1.95 mg/L (n=5, 95% confidence level).

Determination of intensity of luminous radiation from jet fuel flame

1983 ◽  
Vol 19 (12) ◽  
pp. 587-589
Author(s):  
V. G. Gorodetskii ◽  
B. S. Gutenev ◽  
S. S. Zlydarev
Keyword(s):  
Jet Fuel ◽  
Luminous Radiation

scholarly journals Jet Fuel Deposition and Oxidation: Dilution, Materials, Oxygen, and Temperature Effects

1995 ◽  
Author(s):  
Steven Zabarnick ◽  
Paula Zelesnik ◽  
Rebecca R. Grinstead
Keyword(s):  
Thermal Stability ◽  
Electrode Materials ◽  
Batch Reactor ◽  
Jet Fuel ◽  
Pressure Measurements ◽  
Good Technique ◽  
Antioxidant Concentration ◽  
Fuel Deposition

The quartz crystal microbalance (QCM) and pressure measurements are used for determination of jet fuel thermal stability in a batch reactor. The QCM is able to monitor extremely small amounts of deposition in situ, while the pressure measurements provide qualitative data on the oxidation process. The dependence of the deposition amount was monitored as a function of the oxygen availability for two fuels. Also, the effect of QCM electrode materials was investigated. Deposition and oxidation were compared for the following electrode materials: gold, aluminum, silver, and platinum. We also studied the effect of dilution on oxidation and deposition. Jet fuel was diluted with increasing amounts of hydrocarbon solvent. It was observed that this dilution procedure can help characterize a fuel’s effective antioxidant concentration. Fuel dilution is also shown to be a good technique for improving thermal stability characteristics of poor fuels. Additionally we have studied the temperature effect on deposition for two fuels over the range 140 to 180 C.

scholarly journals Enhanced Photocatalytic Degradation of the Imidazolinone Herbicide Imazapyr upon UV/Vis Irradiation in the Presence of CaxMnOy-TiO2 Hetero-Nanostructures: Degradation Pathways and Reaction Intermediates

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 896 ◽  
Author(s):  
Salma Bougarrani ◽  
Preetam K. Sharma ◽  
Jeremy W. J. Hamilton ◽  
Anukriti Singh ◽  
Moisés Canle ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Environmental Remediation ◽  
Irradiation Time ◽  
Radical Scavenger ◽  
Degradation Pathways ◽  
Reaction Intermediates ◽  
Mechanical Grinding ◽  
Polar Species

The determination of reaction pathways and identification of products of pollutants degradation is central to photocatalytic environmental remediation. This work focuses on the photocatalytic degradation of the herbicide Imazapyr (2-(4-methyl-5-oxo-4-propan-2-yl-1H-imidazol-2-yl) pyridine-3-carboxylic acid) under UV-Vis and visible-only irradiation of aqueous suspensions of CaxMnOy-TiO2, and on the identification of the corresponding degradation pathways and reaction intermediates. CaxMnOy-TiO2 was formed by mixing CaxMnOy and TiO2 by mechanical grinding followed by annealing at 500 °C. A complete structural characterization of CaxMnOy-TiO2 was carried out. The photocatalytic activity of the hetero-nanostructures was determined using phenol and Imazapyr herbicide as model pollutants in a stirred tank reactor under UV-Vis and visible-only irradiation. Using equivalent loadings, CaxMnOy-TiO2 showed a higher rate (10.6 μM·h−1) as compared to unmodified TiO2 (7.4 μM·h−1) for Imazapyr degradation under UV-Vis irradiation. The mineralization rate was 4.07 µM·h−1 for CaxMnOy-TiO2 and 1.21 μM·h−1 for TiO2. In the CaxMnOy-TiO2 system, the concentration of intermediate products reached a maximum at 180 min of irradiation that then decreased to a half in 120 min. For unmodified TiO2, the intermediates continuously increased with irradiation time with no decrease observed in their concentration. The enhanced efficiency of the CaxMnOy-TiO2 for the complete degradation of the Imazapyr and intermediates is attributed to an increased adsorption of polar species on the surface of CaxMnOy. Based on LC-MS, photocatalytic degradation pathways for Imazapyr under UV-Vis irradiation have been proposed. Some photocatalytic degradation was obtained under visible-only irradiation for CaxMnOy-TiO2. Hydroxyl radicals were found to be main reactive oxygen species responsible for the photocatalytic degradation through radical scavenger investigations.

scholarly journals Comparative Study of the Effect of Fuel Deoxygenation and Polar Species Removal on Jet Fuel Surface Deposition

2019 ◽  
Vol 33 (3) ◽  
pp. 1825-1836 ◽  
Author(s):  
Ehsan Alborzi ◽  
Phil Gadsby ◽  
Mohammed S. Ismail ◽  
Abdolkarim Sheikhansari ◽  
Matthew. R. Dwyer ◽  
...  
Keyword(s):  
Comparative Study ◽  
Jet Fuel ◽  
Surface Deposition ◽  
Fuel Surface ◽  
Polar Species ◽  
Species Removal
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