酯交换
生物柴油
光催化
催化作用
蓖麻油
埃洛石
异质结
材料科学
化学工程
化学
有机化学
光电子学
复合材料
工程类
作者
Yuan Zong,Jishen Zhu,Jie Lu,Yueyun Li,Jincheng Ding
标识
DOI:10.1016/j.renene.2024.120516
摘要
Biodiesel belongs to renewable energy and is a potential substitute for petrochemical diesel. In this study, ZnO/SnO2@halloysite heterojunction photocatalyst was prepared by loading semiconductor zinc oxide and tin dioxide on layered kaolin by the improved wet calcination method, which was used to photocatalytic the transesterification of castor oil and ethanol to produce biodiesel. TG-DTG, BET, XRD, UV-vis and SEM-EDS were used to characterize the composition, specific surface area, light absorption characteristics and photocatalytic performance of the samples. The reaction conditions were optimized by the Taguchi method. The optimum reaction conditions were as follows: catalyst dosage 4wt%, molar ratio of ethanol to oil 12:1, reaction temperature 75 °C. After 2 h, the yield of biodiesel was 96.75%. In the study of catalyst reusability, the yield of biodiesel is still above 85% after being reused for 5 times. The kinetics of photocatalytic transesterification was studied, and the results accorded with quasi-first-order kinetics. The activation energy was 75.02 kJ/mol. Lastly, an eight-step reaction mechanism of photocatalytic transesterification was proposed. The prepared castor oil biodiesel can be prepared into B20 biodiesel through additives or mixing to meet ASTM D6751 and EN 14214 standards.
科研通智能强力驱动
Strongly Powered by AbleSci AI