TY - JOUR
T1 - Extraction of bio-oils from algae with supercritical carbon dioxide and co-solvents
AU - Patil, Prafulla D.
AU - Dandamudi, Kodanda Phani Raj
AU - Wang, Jun
AU - Deng, Qiang
AU - Deng, Shuguang
N1 - Funding Information:
We gratefully acknowledge the financial supports from US Department of Energy ( DE-EE0003046 ), US Air Force Research Laboratory ( FA8650-11-C-2127 ) and National Science Foundation ( EEC-1028968 ). The authors are thankful to Solix Biofuels Inc. for providing the algae samples for this project. Appendix A
Funding Information:
We gratefully acknowledge the financial supports from US Department of Energy (DE-EE0003046), US Air Force Research Laboratory (FA8650-11-C-2127) and National Science Foundation (EEC-1028968). The authors are thankful to Solix Biofuels Inc. for providing the algae samples for this project.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/5
Y1 - 2018/5
N2 - 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.
AB - 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.
KW - Algal biomass
KW - Azeotropic co-solvents
KW - Bio-oil/lipid
KW - Biofuel
KW - Microwave pretreatment
KW - Supercritical carbon-dioxide (SC-CO)
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U2 - 10.1016/j.supflu.2017.12.019
DO - 10.1016/j.supflu.2017.12.019
M3 - Article
AN - SCOPUS:85039986387
SN - 0896-8446
VL - 135
SP - 60
EP - 68
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
ER -