In this study, biodiesel was prepared from a non edible feedstock using two step process followed by heterogeneous base catalyzed transesterification reaction. A novel solid heterogeneous base catalyst (strontium lanthanum mixed metal oxide) was synthesized via co- precipitation route and was characterized by XRD, FT-IR, SEM, and EDX. The free fatty acid content of the feedstock was assuaged by esterification process followed by transesterification for the synthesis of biodiesel. Effect of co-solvent on biodiesel yield was investigated in each subsequent experiment. Effect of various factors including calcination time, temperature, reaction time, molar ratio (methanol: oil), and catalyst concentration were also taken into account using OVAT (one variable at a time). High quality and pure biodiesel was synthesized at optimized conditions viz. Alcohol to oil molar ratio (14:1), catalyst dose (1.5%), temperature (60°C), stirring speed (600 rpm) for 40 min in presence of DPE (co-solvent to alcohol molar ratio, 1:1) and was characterized by H¹ NMR and FT-IR analysis. Properties of synthesized biodiesel were determined according to ASTM standards. Reusability of catalyst was checked and the catalyst was found stable up to six runs without any significant loss of catalytic activity.

在这项研究中，生物柴油是由非食用原料使用两步法，然后进行异质碱催化的酯交换反应制得的。通过共沉淀法合成了一种新型固体多相碱催化剂（锶镧混合金属氧化物），并通过XRD，FT-IR，SEM和EDX对其进行了表征。原料的游离脂肪酸含量通过酯化过程来保证，然后进行酯交换反应以合成生物柴油。在随后的每个实验中研究了助溶剂对生物柴油收率的影响。还使用OVAT（每次一个变量）考虑了各种因素的影响，包括煅烧时间，温度，反应时间，摩尔比（甲醇：油）和催化剂浓度。在优化的条件下合成了高质量和纯净的生物柴油。℃，搅拌速度（600 rpm）在DPE（助溶剂与醇的摩尔比为1：1）存在下搅拌40分钟，并通过¹ H NMR和FT-IR分析表征。合成的生物柴油的性能根据ASTM标准确定。检查了催化剂的可重复使用性，发现该催化剂在多达六次运行中稳定，而催化活性没有任何明显的损失。