Efficient and Greener Synthesis of Propylene Carbonate from Carbon Dioxide and Propylene Oxide
Efficient and Greener Synthesis of Propylene Carbonate from Carbon Dioxide and Propylene Oxide
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DOI：
10.1021/ie500345z
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发表时间：
2014-12-10
影响因子：
4.2
通讯作者：
Saha, Basudeb
中科院分区：
文献类型：
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作者：
Adeleye, Adegboyega Isaac;Patel, Dipesh;Saha, Basudeb
已经研究了几种用于环氧丙烷（PO）和二氧化碳（CO2）环加成反应的无溶剂合成碳酸亚丙酯（PC）的多相催化剂。利用拉曼光谱、扫描电子显微镜和 X 射线衍射分析成功地对不同的多相催化剂进行了表征。 PC与CO2的间歇环加成反应在高压反应器中进行。研究了影响PO转化率和PC选择性和收率的各种参数的影响，如催化剂类型、催化剂负载量、CO2压力、反应温度和反应时间，以找到该反应的最佳条件和最佳催化剂。与本研究测试的其他多相催化剂相比，氧化铈和氧化镧掺杂氧化锆 (CeLaZrO) 催化剂被发现对于 PC 合成最具活性和选择性。催化剂可重复使用性研究旨在考察性能最佳的 PC 合成催化剂的长期稳定性，发现该催化剂可以重复使用多次而不丧失其催化活性。建立了使用 CeLaZrO 催化剂通过 PO 和 CO2 环加成反应合成 PC 的人工神经网络 (ANN) 模型，以比较实验数据和 ANN 模型的预测结果。 ANN模型预测值与实验结果吻合较好。
Several heterogeneous catalysts have been investigated for solvent-free synthesis of propylene carbonate (PC) for cycloaddition reaction of propylene oxide (PO) and carbon dioxide (CO2). The characterization of different heterogeneous catalysts has been successfully carried out using Raman spectroscopy, scanning electron microscopy, and X-ray diffraction analysis. Batch cycloaddition reaction of PC and CO2 has been conducted in a high pressure reactor. The effect of various parameters that could influence the conversion of PO and the selectivity and yield of PC such as catalyst types, catalyst loading, CO2 pressure, reaction temperature, and reaction time has been studied to find the optimum conditions and the best preferred catalyst for this reaction. Ceria and lanthana doped zirconia (CeLaZrO) catalyst has been found to be the most active and selective for synthesis of PC as compared to other heterogeneous catalysts that were tested as part of this research. Catalyst reusability studies have been conducted to investigate the long-term stability of the best performed catalyst for synthesis of PC, and it has been found that the catalyst could be reused several times without losing its catalytic activity. An artificial neural network (ANN) model has been developed for PC synthesis by cycloaddition reaction of PO and CO2 using CeLaZrO catalyst to compare the experimental data and the predicted results by ANN model. The ANN model predicted values are in good agreement with the experimental results.