Continuous production of biodiesel from microalgae by extraction coupling with transesterification under supercritical conditions.
Continuous production of biodiesel from microalgae by extraction coupling with transesterification under supercritical conditions.
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DOI：
10.1016/j.biortech.2017.04.097
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发表时间：
2017-08
影响因子：
11.4
通讯作者：
Dan Zhou;Baoquan Qiao;Gen Li;Song Xue;Jianzhong Yin
中科院分区：
文献类型：
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作者：
Dan Zhou;Baoquan Qiao;Gen Li;Song Xue;Jianzhong Yin
生物柴油的原料已从食用油扩展到非食用油。本研究以绿藻门和小球藻两种微藻为原料，进行了生物柴油的连续化生产。与超临界CO2萃取耦合，首先提取微藻油脂，然后将其送至下游生产生物柴油。减压后的残渣可作为制药和保健品的原料。结果表明，微藻粒径、温度、压力、醇油摩尔比、CO2流量、正己烷流量等因素对生物柴油产率均有影响。在40目藻、萃取温度60 °C、正己烷流量0.4 ml/min、反应温度340 °C、压力18-20 MPa、CO2流量0.5 L/min、醇油摩尔比84：1的最佳操作条件下，绿藻的得率为56.31%，小球藻的得率为63.78%。因为脂肪含量较高。
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 CO2and n-hexane all have effects on the yield of biodiesel. With the optimal operation conditions: 40 mesh algae, extraction temperature 60 °C, flow of n-hexane 0.4 ml/min, reaction temperature: 340 °C, pressure: 18–20 MPa, CO2flow of 0.5 L/min, molar ration of methanol to oil 84:1, a yield of 56.31% was obtained forChrysophyta, and 63.78% forChlorellasp. due to the higher lipid content.