Lubricant Oxidation Monitoring Using FTIR Analysis - Application to the Development of a Laboratory Bulk Oxidation Test and to In-Service Oil Evaluation

Obiols, Jerome

doi:10.4271/2003-01-1996

Cited by 18 publications

(8 citation statements)

References 7 publications

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“…These chain radical reactions produce several oil degradation products namely alcohol, aldehydes, ketones, and carboxylic acids. The free‐radical chain reaction of the lubricating oil under oxidized environment is given by Equations (1‐7) 42,43 …”

Section: Background Of Experimental Analysismentioning

confidence: 99%

Effects of hexagonal boron nitride based nanofluid on the tribological and performance, emission characteristics of a diesel engine: An experimental study

Ramteke

Chelladurai

2020

Engineering Reports

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In recent years, nanoparticles have attracted researchers attention due to its wear and friction reduction characteristics in lubricating oil. Hence, it is of utmost importance to consider nanoparticles additive in the lube oil and study its impact on the tribological and performance characteristics of mechanical systems. Therefore, this paper intends to explore the impact of conventional and hexagonal boron nitride (hBN) nanoparticles‐based lubricant on the wear of engine components, performance, and emission characteristics of a diesel engine. The different concentration namely, 0.5 wt.%, 0.75 wt.%, and 1 wt.% BN‐based nanofluids were formulated. The formulated nanofluids were characterized by UV‐spectroscopy and differential scanning calorimetry (DSC) for dispersion and heat capacity analyses respectively. From the characterization results, 1wt.% BN nanofluid was found stable and well dispersed and therefore, considered for further experimental analysis. The outcomes of the present study revealed that 1 wt.% BN‐based nanofluid shown better anti‐wear properties and improvement in performance, emission characteristics of the diesel engine. The obtained results will be useful for the lubricant industry to think toward formulating nanoparticles‐based lubricating oil.

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Section: Background Of Experimental Analysismentioning

confidence: 99%

Effects of hexagonal boron nitride based nanofluid on the tribological and performance, emission characteristics of a diesel engine: An experimental study

Ramteke

Chelladurai

2020

Engineering Reports

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“…Fourier transform infrared (FTIR) spectroscopy measurements were also carried out on the above samples using the carbonyl peak area increase (PAI) method reported by Obiols. 6 A potassium bromide cell path length of 0.037 mm was used. Oxidation was measured by calculating the carbonyl area (C¨O) between 1650 cm −1 and 1820 cm −1 in the FTIR spectra.…”

Section: Albemarle Bulk Oil Testmentioning

confidence: 99%

Redesigning alkylated diphenylamine antioxidants for modern lubricants

Gatto

Elnagar

Moehle

et al. 2006

Lubrication Science

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This paper describes a new alkylation technology that is very effective at synthesizing structurally different alkylated diphenylamine chemistries relative to those currently available to lubricant formulators. Examples are provided showing how this technology can be used in a practical way to produce a variety of chemically modified nonylated diphenylamine types. One example is also provided illustrating the preparation of a higher molecular weight dodecylated diphenylamine. Engine oil performance data utilizing pressurized differential scanning calorimetry (PDSC), the thermo-oxidation engine oil simulation test, and a bulk oil oxidation test demonstrate that subtle changes in alkylated diphenylamine chemical composition can result in significant oxidation and deposit control performance enhancements or losses. Examples of similar performance responses in industrial oils are demonstrated utilizing PDSC and the rotating pressure vessel oxidation test. These performance changes are directly related to specific structural changes in the modified products.

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“…The previously mentioned reaction procedure is the same as the oxidation process of lubricating oil. So Fenton oxidation is not only the same as the lubricant oxidation mechanism, but also can produce a large number of highly reactive free radicals and can significantly accelerate the speed of oxidation reaction. On the other hand, antioxidant formulated in turbine oil is radical scavengers, such as phenolic and aminic antioxidants, which can deactivate alkyl radicals, alkylperoxy radicals and hydroperoxides.…”

Section: Resultsmentioning

confidence: 99%

Utilising Fenton reagent to simulate oxidation processes in turbine oil

Zhou

2013

Lubr. Sci.

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To meet the demands of less-sludge deposit and longer-service life, turbine oils need to possess superior oxidation stability. Commercially available turbine oil nitrogen tetroxide (NTO) became green in an actual turbine, which was a risk of serious damage to turbine bearing and lubricating systems. By analysis of pH discoloration, infrared spectroscopy, it is found that the chromogenic materials in in-service oil of NTO (UTO) were the oxidation products of diphenylamine antioxidant at low temperatures. Then, a method utilising Fenton reagent was developed to accelerate oxidation process for assessment of discoloration of turbine oil in service. By screening of experimental conditions, the colour and structure of chromogenic materials in accelerated oxidation products from NTO are the same as those of in-service oil of NTO. Turbine oils in different formulation are oxidised by Fenton reagent in preceding condition. The colours of oxidation products are consistent with the results of ASTM D943 after 1000 h test. This study also provided a better understanding of the oxidation process affecting lubricants and the functional mode of the radical scavenger antioxidant.

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Lubricant Oxidation Monitoring Using FTIR Analysis - Application to the Development of a Laboratory Bulk Oxidation Test and to In-Service Oil Evaluation

Cited by 18 publications

References 7 publications

Effects of hexagonal boron nitride based nanofluid on the tribological and performance, emission characteristics of a diesel engine: An experimental study

Effects of hexagonal boron nitride based nanofluid on the tribological and performance, emission characteristics of a diesel engine: An experimental study

Redesigning alkylated diphenylamine antioxidants for modern lubricants

Utilising Fenton reagent to simulate oxidation processes in turbine oil

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