Production of biodiesel from microalgae oil (Chlorella protothecoides) by non-catalytic transesterification in supercritical methanol and ethanol: Process optimization

Yue Nan, Jiuxu Liu, Ronghong Lin, Lawrence L Tavlarides

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Production of biodiesel through non-catalytic transesterification of microalgae oil in supercritical methanol and ethanol was studied. The response surface methodology (RSM) combined with a five-parameter-five-level central composite design (CCD) was employed to optimize the (270-350 °C), pressure (80-200 bar), alcohol-to-oil molar ratio (10:1-42:1), residence time (10-50 min) and water content (0-10 wt%). Thirty-two experiments were designed and conducted for each alcohol species. Quadratic models were built based on the yields of fatty acid methyl esters (FAMEs) and fatty acid ethyl esters (FAEEs). Optimal conditions and yields for FAMEs and FAEEs were predicted with the models, and model predictions were verified by additional independent experiments conducted under predicted optimal conditions. Optimal biodiesel yields obtained in this work were 90.8% and 87.8% with methanol and ethanol, respectively. The significance of the parameters was evaluated by the analysis of variance (ANOVA). The effects of single parameters and the interacted parameters on the biodiesel yield were also discussed.

Original languageEnglish (US)
Pages (from-to)174-182
Number of pages9
JournalJournal of Supercritical Fluids
Volume97
DOIs
StatePublished - 2015

Fingerprint

Chlorella
Biofuels
Transesterification
fatty acids
Biodiesel
Fatty acids
Methanol
esters
Esters
Oils
Ethanol
ethyl alcohol
Fatty Acids
methyl alcohol
oils
optimization
alcohols
Alcohols
analysis of variance
Analysis of variance (ANOVA)

Keywords

  • Biodiesel
  • Microalgae oil
  • Non-catalytic transesterification
  • Process optimization
  • Response surface methodology

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

@article{9af8b95274b44384bff526bb27fb2588,
title = "Production of biodiesel from microalgae oil (Chlorella protothecoides) by non-catalytic transesterification in supercritical methanol and ethanol: Process optimization",
abstract = "Production of biodiesel through non-catalytic transesterification of microalgae oil in supercritical methanol and ethanol was studied. The response surface methodology (RSM) combined with a five-parameter-five-level central composite design (CCD) was employed to optimize the (270-350 °C), pressure (80-200 bar), alcohol-to-oil molar ratio (10:1-42:1), residence time (10-50 min) and water content (0-10 wt{\%}). Thirty-two experiments were designed and conducted for each alcohol species. Quadratic models were built based on the yields of fatty acid methyl esters (FAMEs) and fatty acid ethyl esters (FAEEs). Optimal conditions and yields for FAMEs and FAEEs were predicted with the models, and model predictions were verified by additional independent experiments conducted under predicted optimal conditions. Optimal biodiesel yields obtained in this work were 90.8{\%} and 87.8{\%} with methanol and ethanol, respectively. The significance of the parameters was evaluated by the analysis of variance (ANOVA). The effects of single parameters and the interacted parameters on the biodiesel yield were also discussed.",
keywords = "Biodiesel, Microalgae oil, Non-catalytic transesterification, Process optimization, Response surface methodology",
author = "Yue Nan and Jiuxu Liu and Ronghong Lin and Tavlarides, {Lawrence L}",
year = "2015",
doi = "10.1016/j.supflu.2014.08.025",
language = "English (US)",
volume = "97",
pages = "174--182",
journal = "Journal of Supercritical Fluids",
issn = "0896-8446",
publisher = "Elsevier",

}

TY - JOUR

T1 - Production of biodiesel from microalgae oil (Chlorella protothecoides) by non-catalytic transesterification in supercritical methanol and ethanol

T2 - Process optimization

AU - Nan, Yue

AU - Liu, Jiuxu

AU - Lin, Ronghong

AU - Tavlarides, Lawrence L

PY - 2015

Y1 - 2015

N2 - Production of biodiesel through non-catalytic transesterification of microalgae oil in supercritical methanol and ethanol was studied. The response surface methodology (RSM) combined with a five-parameter-five-level central composite design (CCD) was employed to optimize the (270-350 °C), pressure (80-200 bar), alcohol-to-oil molar ratio (10:1-42:1), residence time (10-50 min) and water content (0-10 wt%). Thirty-two experiments were designed and conducted for each alcohol species. Quadratic models were built based on the yields of fatty acid methyl esters (FAMEs) and fatty acid ethyl esters (FAEEs). Optimal conditions and yields for FAMEs and FAEEs were predicted with the models, and model predictions were verified by additional independent experiments conducted under predicted optimal conditions. Optimal biodiesel yields obtained in this work were 90.8% and 87.8% with methanol and ethanol, respectively. The significance of the parameters was evaluated by the analysis of variance (ANOVA). The effects of single parameters and the interacted parameters on the biodiesel yield were also discussed.

AB - Production of biodiesel through non-catalytic transesterification of microalgae oil in supercritical methanol and ethanol was studied. The response surface methodology (RSM) combined with a five-parameter-five-level central composite design (CCD) was employed to optimize the (270-350 °C), pressure (80-200 bar), alcohol-to-oil molar ratio (10:1-42:1), residence time (10-50 min) and water content (0-10 wt%). Thirty-two experiments were designed and conducted for each alcohol species. Quadratic models were built based on the yields of fatty acid methyl esters (FAMEs) and fatty acid ethyl esters (FAEEs). Optimal conditions and yields for FAMEs and FAEEs were predicted with the models, and model predictions were verified by additional independent experiments conducted under predicted optimal conditions. Optimal biodiesel yields obtained in this work were 90.8% and 87.8% with methanol and ethanol, respectively. The significance of the parameters was evaluated by the analysis of variance (ANOVA). The effects of single parameters and the interacted parameters on the biodiesel yield were also discussed.

KW - Biodiesel

KW - Microalgae oil

KW - Non-catalytic transesterification

KW - Process optimization

KW - Response surface methodology

UR - http://www.scopus.com/inward/record.url?scp=84921047949&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84921047949&partnerID=8YFLogxK

U2 - 10.1016/j.supflu.2014.08.025

DO - 10.1016/j.supflu.2014.08.025

M3 - Article

AN - SCOPUS:84921047949

VL - 97

SP - 174

EP - 182

JO - Journal of Supercritical Fluids

JF - Journal of Supercritical Fluids

SN - 0896-8446

ER -