Production of diethyl carbonate from ethylene carbonate and ethanol over supported fluoro-perovskite catalysts
Production of diethyl carbonate from ethylene carbonate and ethanol over supported fluoro-perovskite catalysts
复制标题
DOI：
10.1016/j.catcom.2018.01.019
复制
发表时间：
2018-04-01
影响因子：
3.7
通讯作者：
Okumura, Kazu
中科院分区：
文献类型：
--
作者：
Iida, Hajime;Kawaguchi, Ryuhei;Okumura, Kazu
KCaF3/C （K-Ca(A)）催化剂是氟钙钛矿(XYF3)/C （X = K, Cs, Y = Mg, Ca）催化剂间碳酸乙烯（EC）和乙醇酯交换反应的多相碱性催化剂。虽然KMgF3/C （K-Mg (A)）催化剂在XYF3/C催化剂中表现出最高的催化活性，但在K-Mg (A)上观察到钾的浸出。CO2程序升温解吸（TPD）实验表明，XYF3/C具有较强的催化活性是由于其强碱性位点。CO2-TPD和XPS测量表明，强碱性位是由氟的电子密度增加而产生的。
The KCaF3/C (K-Ca(A)) catalyst was shown to be effective as heterogeneous basic catalysts for the transesterification of ethylene carbonate (EC) and ethanol among fluoro-perovskite (XYF3)/C (X = K, Cs, Y = Mg, Ca) catalysts. Although the KMgF3/C (K-Mg (A)) catalyst exhibited the highest catalytic activity among the XYF3/C catalysts studied, the potassium leaching was observed on K-Mg (A). CO2 temperature programmed desorption (TPD) revealed that the superior catalytic activity of the XYF3/C was due to its strong basic sites. CO2-TPD and XPS measurements indicated that strong basic sites are generated by an increase in the electron density of fluorine.