文献类型：期刊文献

英文题名：Energy-efficient extraction of fuel from Chlorella vulgaris by ionic liquid combined with CO2 capture

作者：Yu, Xinhai[1,2];Yang, Jie[3];Lu, Haitao[1];Tu, Shan-Tung[1];Yan, Jinyue[4,5]

机构：[1]E China Univ Sci & Technol, Sch Mech Engn, Key Lab Safety Sci Pressurized Syst MOE, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[3]Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai, Peoples R China;[4]Malardalen Univ, Sch Business Soc & Technol, Vasteras, Sweden;[5]Royal Inst Technol, Sch Chem Sci & Engn, Stockholm, Sweden

年份：2015

卷号：160

起止页码：648

外文期刊名：APPLIED ENERGY

收录：;EI(收录号：20151900824254);WOS:【SCI-EXPANDED(收录号:WOS:000364890700060)】；

基金：This study was financially supported by the China Natural Science Foundation (Contract No. 21176069, 21476073) and the Fundamental Research Funds for the Central Universities (WG1213011).

语种：英文

外文关键词：Algae extraction; CO2 capture; Ionic liquid; Biodiesel; Protein; Energy efficiency

摘要：Algae-sourced feedstocks remain confined to commercialization because of the high cost and energy consumption of biomass cultivation and feedstock extraction. In this study, to reduce the energy consumption required for algae extraction, experiments with Chlorella vulgais extraction by ionic liquids (ILs) combined with CO2 capture were conducted considering that captured CO2 by ILs can compensate the energy consumption of extraction. The results showed that the addition of CO2 to [BMIM][BF4] increased the lipid yield of Chlorella vulgaris from 68.0% to 75.6%. The properties of synthesized biodiesel from C vulgaris lipids met the UNE-EN 14214 European biodiesel standard except for oxidative stability. Protein denaturation and degradation were found during the lysis of algae cells. Approximately 82.2 wt.% of the total extracted proteins could be precipitated during both algae lysis and supernatant liquid drying. A microalgae-to-biofuel route including C vulgaris extraction and CO2 capture was proposed that involves wet algae input and delivery outputs of water, biodiesel, pyrolysis oil, proteins, sugars, biogas and glycerol. Fossil energy ratios (FER) based on the overall energy balance were 3.30 (n = 1, n is the volume ratio of IL to wet algae) and 3.84 (n = 2) for [BMIM][BF4] with CO2 capture, approximately 2.5 times those based on commercially available technologies. The possibilities of synthesizing novel ILs that show both high CO2 absorption and good abilities in cell wall breakage are discussed. More progress is greatly needed to reduce IL recovery loss. (C) 2015 Elsevier Ltd. All rights reserved.