Extraction of bio-oils from algae with supercritical carbon dioxide and co-solvents

Prafulla D. Patil, Kodanda Phani Raj Dandamudi, Jun Wang, Qiang Deng, Shuguang Deng

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Supercritical carbon-dioxide (SC-CO2) is a clean and green technology for extracting bio-oil/lipids from algae (Nannochloropsis salina) for biofuel production and high-value co-products development. A mixed-polarity azeotropic mixture (hexane/ethanol) modifier/co-solvent was added to enhance the SC-CO2 fluid affinity towards neutral lipid and polar lipids. The benefits of inducing mixed polarity solvents include enhanced solvent properties, favorable mass transfer, higher lipid yield, and better lipid quality. A microwave pretreatment prior to supercritical extraction was employed to improve lipid extraction efficiency and reduce extraction energy consumption. The effects of pressure, temperature and co-solvents to algae ratio on lipid extraction yield and fatty acid composition were investigated. A micro-elemental analysis (CHNOS) of total and neutral algal lipid samples was performed according to ASTM methods. The algal biomass characterization and algal lipid analysis were performed using several analytical instruments such as FTIR, SEM-EDS, TGA, Confocal microscopy and GC–MS.

Original languageEnglish (US)
Pages (from-to)60-68
Number of pages9
JournalJournal of Supercritical Fluids
Volume135
DOIs
StatePublished - May 1 2018

Fingerprint

algae
Algae
Carbon Dioxide
Lipids
lipids
carbon dioxide
Carbon dioxide
Oils
oils
Environmental technology
polarity
product development
Biofuels
Confocal microscopy
Hexanes
energy consumption
fatty acids
biomass
Hexane
Chemical analysis

Keywords

  • Algal biomass
  • Azeotropic co-solvents
  • Bio-oil/lipid
  • Biofuel
  • Microwave pretreatment
  • Supercritical carbon-dioxide (SC-CO)

ASJC Scopus subject areas

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

Cite this

Extraction of bio-oils from algae with supercritical carbon dioxide and co-solvents. / Patil, Prafulla D.; Dandamudi, Kodanda Phani Raj; Wang, Jun; Deng, Qiang; Deng, Shuguang.

In: Journal of Supercritical Fluids, Vol. 135, 01.05.2018, p. 60-68.

Research output: Contribution to journalArticle

Patil, Prafulla D. ; Dandamudi, Kodanda Phani Raj ; Wang, Jun ; Deng, Qiang ; Deng, Shuguang. / Extraction of bio-oils from algae with supercritical carbon dioxide and co-solvents. In: Journal of Supercritical Fluids. 2018 ; Vol. 135. pp. 60-68.
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