微藻超临界甲醇直接酯交换法制备生物柴油

以规模化养殖的小球藻为原料,采用超临界甲醇酯交换法开展了制备生物柴油的实验研究。通过对原料藻粉的主要组成和实验产物的元素、化合物组成及基本理化特性进行分析,考察了不同工艺条件对产率的影响。结果表明,在甲醇与湿藻(50% 含水量)配比为8∶1(mL∶g)、反应温度 260℃、反应压力 8 MPa 和停留时间 10 min 的条件下,微藻生物柴油产率高达 9% 以上,具有与石化柴油接近的理化性质和成分组成。

Preparation of Biodiesel from Microalgae by Direct Transesterification under Supercritical Methanol Conditions

In this paper,the liquid bio-fuel from Chorella in large-scale cultivation was prepared by supercritical methanol transesterification.By the analysis of composition,the basic physics and chemistry characterization,the process parameters were optimized depending on the biodiesel yield.The results showed that the yield of the liquid bio-fuel from microalgae could reach up to 9 % under the reaction condition: ratio of methanol to wet algae(ca.50 % moisture) 8 ∶ 1(mL ∶ g),reaction temperature 260 ℃,reaction pressure 9 MPa and retention time 10 min.Meanwhile,the products had similar physical and chemical properties and ingredient composition to fossil diesel.