A comparative study of direct transesterification of camelina oil under supercritical methanol, ethanol and 1-butanol conditions

Yingqiang Sun, Harvind K. Reddy, Tapaswy Muppaneni, Sundaravadivelnathan Ponnusamy, Prafulla D. Patil, Changzhu Li, Lijuan Jiang, Shuguang Deng

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Transesterifications of camelina oil under supercritical methanol, ethanol, and 1-butanol conditions are investigated and compared to find the suitable alcohols for the esters conversion process. The factors affecting the yields of fatty acid methyl esters (FAME), fatty acid ethyl esters (FAEE), and fatty acid butyl eaters (FABE), such as reaction temperature and time, are studied and discussed in detail. The increase of the reaction temperature and time is proved to be favorable to the production of FAME, FAEE, and FABE initially since the transesterification is a reversible, endothermal reaction; however, the persistent increase of reaction temperature and time will decrease the yield of the Camelina sativa biofuels due to their thermal instability. The composition and thermal stability of biodiesel produced under various supercritical alcohol conditions are characterized by gas chromatography-mass spectrometry and thermogravimetric analysis methods. The saturated degree of fatty acid esters in C. sativa oil decreases with the increase of the alkyl chain of the alcohols from methanol, ethanol, to 1-butanol. The physical properties of biodiesels including the specific gravity, viscosity, calorific value, cold properties, and cetane number are tested and compared with the American Society for Testing and Materials (ASTM) standards. According to the results, the specific gravity and the viscosity of the C. sativa biodiesels are comparable to the ASTM standards. The calorific value, cetane number, and cold properties of biodiesel are improved with the increase of the length of the carbon chain of alcohols, while they decrease with the increase of unsaturated degree of compositions of biodiesels.

Original languageEnglish (US)
Pages (from-to)530-536
Number of pages7
JournalFuel
Volume135
DOIs
StatePublished - 2014
Externally publishedYes

Fingerprint

1-Butanol
Transesterification
Butenes
Fatty acids
Methanol
Oils
Ethanol
Fatty Acids
Esters
Biofuels
Alcohols
Calorific value
Antiknock rating
Biodiesel
Density (specific gravity)
Viscosity
Testing
Chemical analysis
Gas chromatography
Temperature

Keywords

  • Biodiesels
  • Camelina sativa oil
  • Supercritical alcohols
  • Transesterification

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Chemical Engineering(all)
  • Organic Chemistry

Cite this

A comparative study of direct transesterification of camelina oil under supercritical methanol, ethanol and 1-butanol conditions. / Sun, Yingqiang; Reddy, Harvind K.; Muppaneni, Tapaswy; Ponnusamy, Sundaravadivelnathan; Patil, Prafulla D.; Li, Changzhu; Jiang, Lijuan; Deng, Shuguang.

In: Fuel, Vol. 135, 2014, p. 530-536.

Research output: Contribution to journalArticle

Sun, Yingqiang ; Reddy, Harvind K. ; Muppaneni, Tapaswy ; Ponnusamy, Sundaravadivelnathan ; Patil, Prafulla D. ; Li, Changzhu ; Jiang, Lijuan ; Deng, Shuguang. / A comparative study of direct transesterification of camelina oil under supercritical methanol, ethanol and 1-butanol conditions. In: Fuel. 2014 ; Vol. 135. pp. 530-536.
@article{1399a24ffa0747ada95b32f8e84084c0,
title = "A comparative study of direct transesterification of camelina oil under supercritical methanol, ethanol and 1-butanol conditions",
abstract = "Transesterifications of camelina oil under supercritical methanol, ethanol, and 1-butanol conditions are investigated and compared to find the suitable alcohols for the esters conversion process. The factors affecting the yields of fatty acid methyl esters (FAME), fatty acid ethyl esters (FAEE), and fatty acid butyl eaters (FABE), such as reaction temperature and time, are studied and discussed in detail. The increase of the reaction temperature and time is proved to be favorable to the production of FAME, FAEE, and FABE initially since the transesterification is a reversible, endothermal reaction; however, the persistent increase of reaction temperature and time will decrease the yield of the Camelina sativa biofuels due to their thermal instability. The composition and thermal stability of biodiesel produced under various supercritical alcohol conditions are characterized by gas chromatography-mass spectrometry and thermogravimetric analysis methods. The saturated degree of fatty acid esters in C. sativa oil decreases with the increase of the alkyl chain of the alcohols from methanol, ethanol, to 1-butanol. The physical properties of biodiesels including the specific gravity, viscosity, calorific value, cold properties, and cetane number are tested and compared with the American Society for Testing and Materials (ASTM) standards. According to the results, the specific gravity and the viscosity of the C. sativa biodiesels are comparable to the ASTM standards. The calorific value, cetane number, and cold properties of biodiesel are improved with the increase of the length of the carbon chain of alcohols, while they decrease with the increase of unsaturated degree of compositions of biodiesels.",
keywords = "Biodiesels, Camelina sativa oil, Supercritical alcohols, Transesterification",
author = "Yingqiang Sun and Reddy, {Harvind K.} and Tapaswy Muppaneni and Sundaravadivelnathan Ponnusamy and Patil, {Prafulla D.} and Changzhu Li and Lijuan Jiang and Shuguang Deng",
year = "2014",
doi = "10.1016/j.fuel.2014.06.070",
language = "English (US)",
volume = "135",
pages = "530--536",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - A comparative study of direct transesterification of camelina oil under supercritical methanol, ethanol and 1-butanol conditions

AU - Sun, Yingqiang

AU - Reddy, Harvind K.

AU - Muppaneni, Tapaswy

AU - Ponnusamy, Sundaravadivelnathan

AU - Patil, Prafulla D.

AU - Li, Changzhu

AU - Jiang, Lijuan

AU - Deng, Shuguang

PY - 2014

Y1 - 2014

N2 - Transesterifications of camelina oil under supercritical methanol, ethanol, and 1-butanol conditions are investigated and compared to find the suitable alcohols for the esters conversion process. The factors affecting the yields of fatty acid methyl esters (FAME), fatty acid ethyl esters (FAEE), and fatty acid butyl eaters (FABE), such as reaction temperature and time, are studied and discussed in detail. The increase of the reaction temperature and time is proved to be favorable to the production of FAME, FAEE, and FABE initially since the transesterification is a reversible, endothermal reaction; however, the persistent increase of reaction temperature and time will decrease the yield of the Camelina sativa biofuels due to their thermal instability. The composition and thermal stability of biodiesel produced under various supercritical alcohol conditions are characterized by gas chromatography-mass spectrometry and thermogravimetric analysis methods. The saturated degree of fatty acid esters in C. sativa oil decreases with the increase of the alkyl chain of the alcohols from methanol, ethanol, to 1-butanol. The physical properties of biodiesels including the specific gravity, viscosity, calorific value, cold properties, and cetane number are tested and compared with the American Society for Testing and Materials (ASTM) standards. According to the results, the specific gravity and the viscosity of the C. sativa biodiesels are comparable to the ASTM standards. The calorific value, cetane number, and cold properties of biodiesel are improved with the increase of the length of the carbon chain of alcohols, while they decrease with the increase of unsaturated degree of compositions of biodiesels.

AB - Transesterifications of camelina oil under supercritical methanol, ethanol, and 1-butanol conditions are investigated and compared to find the suitable alcohols for the esters conversion process. The factors affecting the yields of fatty acid methyl esters (FAME), fatty acid ethyl esters (FAEE), and fatty acid butyl eaters (FABE), such as reaction temperature and time, are studied and discussed in detail. The increase of the reaction temperature and time is proved to be favorable to the production of FAME, FAEE, and FABE initially since the transesterification is a reversible, endothermal reaction; however, the persistent increase of reaction temperature and time will decrease the yield of the Camelina sativa biofuels due to their thermal instability. The composition and thermal stability of biodiesel produced under various supercritical alcohol conditions are characterized by gas chromatography-mass spectrometry and thermogravimetric analysis methods. The saturated degree of fatty acid esters in C. sativa oil decreases with the increase of the alkyl chain of the alcohols from methanol, ethanol, to 1-butanol. The physical properties of biodiesels including the specific gravity, viscosity, calorific value, cold properties, and cetane number are tested and compared with the American Society for Testing and Materials (ASTM) standards. According to the results, the specific gravity and the viscosity of the C. sativa biodiesels are comparable to the ASTM standards. The calorific value, cetane number, and cold properties of biodiesel are improved with the increase of the length of the carbon chain of alcohols, while they decrease with the increase of unsaturated degree of compositions of biodiesels.

KW - Biodiesels

KW - Camelina sativa oil

KW - Supercritical alcohols

KW - Transesterification

UR - http://www.scopus.com/inward/record.url?scp=84907307669&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84907307669&partnerID=8YFLogxK

U2 - 10.1016/j.fuel.2014.06.070

DO - 10.1016/j.fuel.2014.06.070

M3 - Article

VL - 135

SP - 530

EP - 536

JO - Fuel

JF - Fuel

SN - 0016-2361

ER -