A comparison of analytical techniques and the products formed during the decomposition of biodiesel under accelerated conditions

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Abstract

Biodiesel is a renewable fuel synthesised from plant, waste or algal oils. Though biodiesel can be used as a replacement for diesel fuel, a number of technical issues, including the reduced oxidative stability, limit the application. This research article compares various analytical techniques which can be used to assess the oxidation of biodiesel and, through comparison, elucidate further the products and mechanism of degradation. Rapeseed methyl ester (RME) was oxidised at both 90 °C and 150 °C, aliquots of both the solution and the volatiles were taken and analysed using UV-VIS spectroscopy, FTIR spectroscopy, GC-MS, 1-H and 13-C NMR experiments. The viscosity and the refractive index of the samples were also recorded. Though NMR and GC-MS offer excellent methods to assess the oxidation both require lengthy sample preparation. In contrast in situ FT-IR requires less sample preparation and as such, would be a useful tool for use as an oxidation sensor.
LanguageEnglish
Pages426-433
Number of pages8
JournalFuel
Volume96
Early online date4 Feb 2012
DOIs
StatusPublished - Jun 2012

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Biofuels
Biodiesel
Decomposition
Oxidation
Nuclear magnetic resonance
Diesel fuels
Ultraviolet spectroscopy
Refractive index
Esters
Oils
Spectroscopy
Viscosity
Degradation
Sensors
Experiments

Keywords

  • degradation
  • oxidation
  • biodiesel
  • spectroscopy

Cite this

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title = "A comparison of analytical techniques and the products formed during the decomposition of biodiesel under accelerated conditions",
abstract = "Biodiesel is a renewable fuel synthesised from plant, waste or algal oils. Though biodiesel can be used as a replacement for diesel fuel, a number of technical issues, including the reduced oxidative stability, limit the application. This research article compares various analytical techniques which can be used to assess the oxidation of biodiesel and, through comparison, elucidate further the products and mechanism of degradation. Rapeseed methyl ester (RME) was oxidised at both 90 °C and 150 °C, aliquots of both the solution and the volatiles were taken and analysed using UV-VIS spectroscopy, FTIR spectroscopy, GC-MS, 1-H and 13-C NMR experiments. The viscosity and the refractive index of the samples were also recorded. Though NMR and GC-MS offer excellent methods to assess the oxidation both require lengthy sample preparation. In contrast in situ FT-IR requires less sample preparation and as such, would be a useful tool for use as an oxidation sensor.",
keywords = "degradation, oxidation, biodiesel, spectroscopy",
author = "Chuck, {Christopher J} and Bannister, {Christopher D} and Jenkins, {Rhodri W} and Lowe, {John P} and Davidson, {Matthew G}",
year = "2012",
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AU - Chuck,Christopher J

AU - Bannister,Christopher D

AU - Jenkins,Rhodri W

AU - Lowe,John P

AU - Davidson,Matthew G

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N2 - Biodiesel is a renewable fuel synthesised from plant, waste or algal oils. Though biodiesel can be used as a replacement for diesel fuel, a number of technical issues, including the reduced oxidative stability, limit the application. This research article compares various analytical techniques which can be used to assess the oxidation of biodiesel and, through comparison, elucidate further the products and mechanism of degradation. Rapeseed methyl ester (RME) was oxidised at both 90 °C and 150 °C, aliquots of both the solution and the volatiles were taken and analysed using UV-VIS spectroscopy, FTIR spectroscopy, GC-MS, 1-H and 13-C NMR experiments. The viscosity and the refractive index of the samples were also recorded. Though NMR and GC-MS offer excellent methods to assess the oxidation both require lengthy sample preparation. In contrast in situ FT-IR requires less sample preparation and as such, would be a useful tool for use as an oxidation sensor.

AB - Biodiesel is a renewable fuel synthesised from plant, waste or algal oils. Though biodiesel can be used as a replacement for diesel fuel, a number of technical issues, including the reduced oxidative stability, limit the application. This research article compares various analytical techniques which can be used to assess the oxidation of biodiesel and, through comparison, elucidate further the products and mechanism of degradation. Rapeseed methyl ester (RME) was oxidised at both 90 °C and 150 °C, aliquots of both the solution and the volatiles were taken and analysed using UV-VIS spectroscopy, FTIR spectroscopy, GC-MS, 1-H and 13-C NMR experiments. The viscosity and the refractive index of the samples were also recorded. Though NMR and GC-MS offer excellent methods to assess the oxidation both require lengthy sample preparation. In contrast in situ FT-IR requires less sample preparation and as such, would be a useful tool for use as an oxidation sensor.

KW - degradation

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