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Indexed by:期刊论文

Date of Publication:2017-08-01

Journal:BIORESOURCE TECHNOLOGY

Included Journals:SCIE、EI、PubMed

Volume:238

Page Number:609-615

ISSN No.:0960-8524

Key Words:Biodiesel; Microalgae; Supercritical fluid; Extraction coupling with reaction; Continuous

Abstract:Raw material for biodiesel has been expanded from edible oil to non-edible oil. In this study, biodiesel continuous production for two kinds of microalgae Chrysophyta and Chlorella sp. was conducted. Coupling with the supercritical carbon dioxide extraction, the oil of microalgae was extracted firstly, and then sent to the downstream production of biodiesel. The residue after decompression can be reused as the material for pharmaceuticals and nutraceuticals. Results showed that the particle size of microalgae, temperature, pressure, molar ration of methanol to oil, flow of CO2 and n-hexane all have effects on the yield of biodiesel. With the optimal operation conditions: 40 mesh algae, extraction temperature 60 degrees C, flow of n-hexane 0.4 ml/min, reaction temperature: 340 degrees C, pressure: 18-20 MPa, CO2 flow of 0.5 L/min, molar ration of methanol to oil 84: 1, a yield of 56.31% was obtained for Chrysophyta, and 63.78% for Chlorella sp. due to the higher lipid content. (C) 2017 Published by Elsevier Ltd.