Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai 600025, India.
Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai 600025, India.
Bioresour Technol. 2014 Mar;156:283-90. doi: 10.1016/j.biortech.2014.01.050. Epub 2014 Jan 24.
In situ transesterification of Enteromorpha compressa algal biomass was carried out for the production of biodiesel. The maximum methyl esters (ME) yield of 98.89% was obtained using ultrasonic irradiation. Tetra hydro furan (THF) and acid catalyst (H2SO4) was found to be an appropriate co-solvent and catalyst for high free fatty acids (FFA) content E. compressa biomass to increase the efficiency of the reactive in situ process. The optimization study was conducted to obtain the maximum yield and it was determined as 30vol% of THF as a co-solvent, 10wt% of H2SO4, 5.5:1 ratio of methanol to algal biomass and 600rpm of mixing intensity at 65°C for 90min of ultrasonic irradiation time. The produced biodiesel was characterized by (1)H nuclear magnetic resonance spectroscopy ((1)H NMR) analysis. Kinetic studies revealed that the reaction followed the first-order reaction mechanism. Rapid in situ transesterification was found to be suitable technique to produce biodiesel from marine macroalgae feedstock.
采用原位酯交换法从孔石莼中提取生物柴油。超声辐射条件下，甲酯（ME）的最大产率为 98.89%。四氢呋喃（THF）和酸催化剂（H2SO4）被发现是一种合适的共溶剂和催化剂，可用于高游离脂肪酸（FFA）含量的孔石莼生物质，以提高反应的原位过程的效率。通过优化研究获得了最大产率，确定最佳条件为：30vol%的 THF 作为共溶剂，10wt%的 H2SO4，甲醇与藻类生物质的比例为 5.5:1，在 600rpm 的混合强度下，超声辐射时间为 90min，温度为 65°C。通过（1）H 核磁共振波谱（（1）H NMR）分析对所制备的生物柴油进行了表征。动力学研究表明，该反应遵循一级反应机制。快速的原位酯交换是一种从海洋大型海藻原料生产生物柴油的合适技术。
