Spectroscopic studies of oxidative degradation of base oils

A. Adhvaryu; J. M. Perez; I. D. Singh; O. S. Tyagi

doi:10.1021/ef980134m

Spectroscopic studies of oxidative degradation of base oils

A. Adhvaryu, J. M. Perez, I. D. Singh, O. S. Tyagi

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

NMR and FTIR spectroscopies have been used for obtaining component-level information on the thermo-oxidation of some base oils. Base oils were first separated by column chromatography into their saturates, aromatics, and polars. These fractions as well as the neat base oil were oxidized by a modified IP 306 benchtop (simulated) method. A ¹H and ¹³C NMR-derived structural model was utilized to monitor the structural changes and rearrangements occurring in the carbon skeleton of the hydrocarbons during oxidation of base oils/fractions. FTIR was used to measure variations in the concentration profiles in the carbonyl absorption region (1649-1815 cm^-1). Difference FTIR spectra and deconvolution techniques were employed to detect new compounds formed as well as minor concentration changes in oil components. NMR and FTIR results were utilized to study the role of different hydrocarbon types in the oxidation of base oil and to establish the reaction mechanism responsible for the degradation of base oils.

Original language	English (US)
Pages (from-to)	1369-1374
Number of pages	6
Journal	Energy and Fuels
Volume	12
Issue number	6
DOIs	https://doi.org/10.1021/ef980134m
State	Published - 1998

All Science Journal Classification (ASJC) codes

General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology

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10.1021/ef980134m

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title = "Spectroscopic studies of oxidative degradation of base oils",

abstract = "NMR and FTIR spectroscopies have been used for obtaining component-level information on the thermo-oxidation of some base oils. Base oils were first separated by column chromatography into their saturates, aromatics, and polars. These fractions as well as the neat base oil were oxidized by a modified IP 306 benchtop (simulated) method. A 1H and 13C NMR-derived structural model was utilized to monitor the structural changes and rearrangements occurring in the carbon skeleton of the hydrocarbons during oxidation of base oils/fractions. FTIR was used to measure variations in the concentration profiles in the carbonyl absorption region (1649-1815 cm-1). Difference FTIR spectra and deconvolution techniques were employed to detect new compounds formed as well as minor concentration changes in oil components. NMR and FTIR results were utilized to study the role of different hydrocarbon types in the oxidation of base oil and to establish the reaction mechanism responsible for the degradation of base oils.",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - Spectroscopic studies of oxidative degradation of base oils

AU - Adhvaryu, A.

AU - Perez, J. M.

AU - Singh, I. D.

AU - Tyagi, O. S.

PY - 1998

Y1 - 1998

N2 - NMR and FTIR spectroscopies have been used for obtaining component-level information on the thermo-oxidation of some base oils. Base oils were first separated by column chromatography into their saturates, aromatics, and polars. These fractions as well as the neat base oil were oxidized by a modified IP 306 benchtop (simulated) method. A 1H and 13C NMR-derived structural model was utilized to monitor the structural changes and rearrangements occurring in the carbon skeleton of the hydrocarbons during oxidation of base oils/fractions. FTIR was used to measure variations in the concentration profiles in the carbonyl absorption region (1649-1815 cm-1). Difference FTIR spectra and deconvolution techniques were employed to detect new compounds formed as well as minor concentration changes in oil components. NMR and FTIR results were utilized to study the role of different hydrocarbon types in the oxidation of base oil and to establish the reaction mechanism responsible for the degradation of base oils.

AB - NMR and FTIR spectroscopies have been used for obtaining component-level information on the thermo-oxidation of some base oils. Base oils were first separated by column chromatography into their saturates, aromatics, and polars. These fractions as well as the neat base oil were oxidized by a modified IP 306 benchtop (simulated) method. A 1H and 13C NMR-derived structural model was utilized to monitor the structural changes and rearrangements occurring in the carbon skeleton of the hydrocarbons during oxidation of base oils/fractions. FTIR was used to measure variations in the concentration profiles in the carbonyl absorption region (1649-1815 cm-1). Difference FTIR spectra and deconvolution techniques were employed to detect new compounds formed as well as minor concentration changes in oil components. NMR and FTIR results were utilized to study the role of different hydrocarbon types in the oxidation of base oil and to establish the reaction mechanism responsible for the degradation of base oils.

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Spectroscopic studies of oxidative degradation of base oils

Abstract

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