The present study includes the transesterification reaction of waste glycerol produced in biodiesel industries with dimethyl carbonate (DMC) in presence of magnesium nickel-based mixed oxide, an economically and highly potent cost-effective heterogeneous base catalyst. The catalyst was synthesized in different molar ratios via co-precipitation route. The main objective of this work is value addition of bio glycerol which is major drawbacks in biodiesel industries and economization of biodiesel production process through one of the value added product glycerol carbonate. First-time Ni Mg based mixed oxide catalyst was used in glycerol carbonate synthesis and obtained 82% yield at optimized reaction condition. The physicochemical characteristics of catalysts were analyzed through powder X-ray diffraction (XRD), SEM-EDX, N₂-sorption, XPS, FTIR spectroscopy, TGA-DSC. The Gibbs free energy change (ΔG^#) and enthalpy of activation (ΔH^#) for transesterification reaction of glycerol was found to be 16.547 kJ mol-1 and118.73 kJmol^-1 respectively. The positive value of Gibbs free energy change suggested the transesterification of glycerol followed endothermic non spontaneous pathway. Optimization of several reaction parameters like reaction time, temperature, DMC to GLY molar ratio, Catalyst loading percentage were well explained also the green chemistry metrices of the catalyst was studied and found to be very suitable for transesterification reaction of glycerol.

本研究包括在生物镍工业中生产的废甘油与碳酸二甲酯（DMC）在镁镍基混合氧化物（一种经济有效的高性价比多相基础催化剂）的存在下进行的酯交换反应。通过共沉淀途径以不同的摩尔比合成催化剂。这项工作的主要目的是生物甘油的增值，这是生物柴油行业的主要缺点，并且通过增值产品碳酸甘油酯之一来节省生物柴油的生产过程。首次将Ni Mg基混合氧化物催化剂用于碳酸甘油酯的合成，并在优化的反应条件下获得82％的收率。通过粉末X射线衍射（XRD），SEM-EDX，N ₂分析了催化剂的理化特性。吸附，XPS，FTIR光谱，TGA-DSC。发现甘油的酯交换反应的吉布斯自由能变化（ΔG ^＃）和活化焓（ΔH ^＃）分别为16.547 kJ mol-1和118.73 kJmol ^-1。Gibbs自由能变化的正值表明甘油的酯交换反应遵循吸热非自发途径。很好地解释了反应时间，温度，DMC与GLY的摩尔比，催化剂的负载百分比等几个反应参数的优化，还研究了该催化剂的绿色化学指标，发现其非常适合甘油的酯交换反应。