State Key Laboratory of Fine Chemicals, School of Chemical Machinery, Dalian University of Technology, Dalian 116024, PR China.
Marine Bioproducts Engineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 16023, PR China.
Bioresour Technol. 2017 Aug;238:609-615. doi: 10.1016/j.biortech.2017.04.097. Epub 2017 Apr 27.
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 CO and n-hexane all have effects on the yield of biodiesel. With the optimal operation conditions: 40mesh algae, extraction temperature 60°C, flow of n-hexane 0.4ml/min, reaction temperature: 340°C, pressure: 18-20MPa, CO flow of 0.5L/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.
生物柴油的原料已从食用油扩展到非食用油。本研究对两种微藻金藻和小球藻进行了生物柴油连续生产。通过与超临界二氧化碳萃取相结合，首先提取微藻油，然后将其输送到生物柴油的下游生产中。减压后的残渣可重复用作药物和营养保健品的原料。结果表明，微藻的粒径、温度、压力、甲醇与油的摩尔比、CO 和正己烷的流量均对生物柴油的产率有影响。在最佳操作条件下：藻粒径 40 目，萃取温度 60°C，正己烷流量 0.4ml/min，反应温度：340°C，压力：18-20MPa，CO 流量 0.5L/min，甲醇与油的摩尔比 84:1，金藻的产率为 56.31%，由于脂质含量较高，小球藻的产率为 63.78%。
