离子液体
化学
催化作用
硅醇
分子筛
X射线光电子能谱
多相催化
差示扫描量热法
无机化学
选择性
热稳定性
化学工程
有机化学
热力学
物理
工程类
作者
Shimin Liu,Jianpeng Shang,Shiguo Zhang,Benqun Yang,Yuanfu Deng
标识
DOI:10.1016/j.cattod.2012.06.023
摘要
A series of silica, glass and molecular sieves supported chloroaluminate ionic liquids (ILs) were prepared and their catalytic performance on the trimerization of isobutene based on C4 mixture was investigated. Interestingly, it was found that the carrier played a key role in the reaction route. Among these supported catalysts, silica supported chloroaluminate ionic liquid was highly efficient for the trimerization of isobutene. X-ray photoelectron spectroscopy (XPS) and differential scanning calorimetry (DSC) characterizations suggested that the synergy between Al2Cl7− anion and silica induced the catalytic activity for isobutene oligomerization due to the strong interaction between ILs and silanol group. The reaction conditions including loading amount, temperature, reactant concentration, and space velocity for the isobutene oligomerization were optimized. Ultimately, complete conversion of isobutene and 91.4% selectivity of trimers were obtained over the IL/silica (30 wt.%) catalyst at mild conditions. Moreover, catalyst stability and deactivation were preliminarily studied.
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