不同形貌CeO2催化CO2合成环状碳酸酯的研究

Synthesis of Cyclic Carbonate from Carbon Dioxide Catalyzed by Different Morphologies CeO2

陈晓雨 王春蓉 孙京 王景芸 陈阳 周明东

Xiaoyu CHEN Chunrong WANG Jing SUN Jingyun WANG Yang CHEN Mingdong ZHOU

辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

以不同形貌CeO2为催化剂，催化CO2和1，3?丙二醇合成三亚甲基碳酸酯。通过SEM、TEM、XPS和XRD对不同形貌CeO2的结构和组成进行了表征。结果表明，当以棒状CeO2为催化剂、2?氰基吡啶为脱水剂，在反应温度为130 ℃、反应时间为4 h时，三亚甲基碳酸酯的收率为72.5%；R?CeO2具有较多的缺陷位点数量和适宜的比表面积，平均粒径小且具有中等数量的路易斯酸性位点。在此基础上对底物范围进行了拓展，实验结果显示五元环状碳酸酯和六元环状碳酸酯均能得到较好的收率。

Different morphology CeO2 was used as a catalyst to catalyse the synthesis of trimethylene carbonate from CO2 and 1,3?propanediol.The structure and composition of cerium oxides were characterized by SEM, TEM, XPS and XRD. The results showed that the yield of trimethylene carbonate was up to 72.5% at 130 ℃ for 4 h when using the rod?shaped cerium oxide as catalyst and 2?cyanopyridine as dehydrating agent. R?CeO2 has a higher number of defect sites and an suitable specific surface area, The average particle size is small and it has moderate number of Lewis acidic sites. Based on this, the substrate range was expanded, and the experimental results showed that both five?membered cyclic carbonates and six?membered cyclic carbonates could be obtained in good yields.

辽宁省教育厅科学技术研究项目（面上项目）(LJKZ0373);辽宁省博士科研启动基金计划项目(2021?BS?249);中国石油化工股份有限公司项目(222175)

10.12422/j.issn.1006-396X.2023.05.005