Abstract In the present study, different sources of eggshell were used as catalysts in the transesterification reaction for biodiesel production using different vegetable oils (soybean, canola, corn, and sunflower). Eggshells samples were calcinated at 800 oC and characterized by XRD, SEM, and CO2-TPD. Transesterification reactions were performed at 65 °C for 4 h in a batch reactor with alcohol:oil molar ratio 9:1 and catalyst:oil ratio of 3% (wt.). Product analysis was performed by Fourier Transform Infrared spectroscopy (FTIR). Samples showed biodiesel yields above 85 %. The best results were obtained using soybean and sunflower oils, and white chicken eggshell and quail eggshell as catalysts. These results are related to a higher percentage of palmitic acid and stearic acid in these oils, and to the strength of the basic sites of these catalysts.

中文翻译：

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使用不同来源的蛋壳作为催化剂的不同植物油的酯交换

摘要 在本研究中，不同来源的蛋壳被用作使用不同植物油（大豆、油菜籽、玉米和向日葵）生产生物柴油的酯交换反应中的催化剂。蛋壳样品在 800 oC 下煅烧，并通过 XRD、SEM 和 CO2-TPD 进行表征。在醇:油摩尔比为 9:1 和催化剂:油比为 3% (wt.) 的间歇式反应器中，在 65°C 下进行酯交换反应 4 小时。通过傅立叶变换红外光谱(FTIR)进行产物分析。样品显示生物柴油的产量超过 85%。使用大豆油和葵花籽油以及白鸡蛋壳和鹌鹑蛋壳作为催化剂获得了最好的结果。这些结果与这些油中棕榈酸和硬脂酸的百分比较高有关，