Optimization of direct conversion of wet algae to biodiesel under supercritical methanol conditions

Prafulla D. Patil, Veera Gnaneswar Gude, Aravind Mannarswamy, Shuguang Deng, Peter Cooke, Stuart Munson-McGee, Isaac Rhodes, Peter Lammers, Nagamany Nirmalakhandan

Research output: Contribution to journalArticle

236 Citations (Scopus)

Abstract

This study demonstrated a one-step process for direct liquefaction and conversion of wet algal biomass containing about 90% of water to biodiesel under supercritical methanol conditions. This one-step process enables simultaneous extraction and transesterification of wet algal biomass. The process conditions are milder than those required for pyrolysis and prevent the formation of by-products. In the proposed process, fatty acid methyl esters (FAMEs) can be produced from polar phospholipids, free fatty acids, and triglycerides. A response surface methodology (RSM) was used to analyze the influence of the three process variables, namely, the wet algae to methanol (wt./vol.) ratio, the reaction temperature, and the reaction time, on the FAMEs conversion. Algal biodiesel samples were analyzed by ATR-FTIR and GC-MS. Based on the experimental analysis and RSM study, optimal conditions for this process are reported as: wet algae to methanol (wt./vol.) ratio of around 1:9, reaction temperature and time of about 255°C, and 25. min respectively. This single-step process can potentially be an energy efficient and economical route for algal biodiesel production.

Original languageEnglish (US)
Pages (from-to)118-122
Number of pages5
JournalBioresource Technology
Volume102
Issue number1
DOIs
StatePublished - Jan 2011
Externally publishedYes

Fingerprint

Biofuels
Algae
Biodiesel
Fatty acids
Methanol
methanol
fatty acid
alga
ester
Esters
Biomass
Fatty Acids
Transesterification
Phospholipids
biomass
Liquefaction
phospholipid
Nonesterified Fatty Acids
liquefaction
pyrolysis

Keywords

  • Biodiesel
  • Response surface methodology
  • Supercritical methanol
  • Wet algae

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

Patil, P. D., Gude, V. G., Mannarswamy, A., Deng, S., Cooke, P., Munson-McGee, S., ... Nirmalakhandan, N. (2011). Optimization of direct conversion of wet algae to biodiesel under supercritical methanol conditions. Bioresource Technology, 102(1), 118-122. https://doi.org/10.1016/j.biortech.2010.06.031

Optimization of direct conversion of wet algae to biodiesel under supercritical methanol conditions. / Patil, Prafulla D.; Gude, Veera Gnaneswar; Mannarswamy, Aravind; Deng, Shuguang; Cooke, Peter; Munson-McGee, Stuart; Rhodes, Isaac; Lammers, Peter; Nirmalakhandan, Nagamany.

In: Bioresource Technology, Vol. 102, No. 1, 01.2011, p. 118-122.

Research output: Contribution to journalArticle

Patil, PD, Gude, VG, Mannarswamy, A, Deng, S, Cooke, P, Munson-McGee, S, Rhodes, I, Lammers, P & Nirmalakhandan, N 2011, 'Optimization of direct conversion of wet algae to biodiesel under supercritical methanol conditions', Bioresource Technology, vol. 102, no. 1, pp. 118-122. https://doi.org/10.1016/j.biortech.2010.06.031
Patil, Prafulla D. ; Gude, Veera Gnaneswar ; Mannarswamy, Aravind ; Deng, Shuguang ; Cooke, Peter ; Munson-McGee, Stuart ; Rhodes, Isaac ; Lammers, Peter ; Nirmalakhandan, Nagamany. / Optimization of direct conversion of wet algae to biodiesel under supercritical methanol conditions. In: Bioresource Technology. 2011 ; Vol. 102, No. 1. pp. 118-122.
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