UiO-66基催化剂的酸调控及其在丁烯双键异构反应中的应用

ACID MODULATION OF UiO-66-BASED CATALYSTS AND ITS APPLICATION IN THE DOUBLE-BOND ISOMERIZATION OF BUTENE

通过添加盐酸和乙酸调节剂成功合成了含有缺陷位点的UiO-66-HCl和UiO-66-HAC催化剂.X射线衍射、傅里叶变换红外光谱、热重分析、扫描电镜、N2吸附-脱附和NH3程序升温脱附等表征结果表明,催化剂的结晶度、粒径、形貌和孔结构得到优化,酸量提高.丁烯原料的评价结果表明:添加调节剂制备的含有较多缺陷位点的UiO-66显著提高了2-丁烯双键异构生成1-丁烯的催化性能;当反应温度为360℃、体积空速为12 h-1时,UiO-66-HAC催化丁烯双键异构生成1-丁烯的收率高达12.7%,选择性高达97%.

UiO-66-HCl and UiO-66-HAC catalysts containing defect sites were successfully synthesized by adding hydrochloric acid and acetic acid modifier.The results of XRD,TG,SEM,BET and TPD showed that the crystallinity,particle size,morphology and pore structure of the catalyst had been optimized,and the acid content has been increased.The evaluation results of butene as raw material showed that UiO-66 with many defect sites could significantly improve the catalytic performance of 2-butene double-bond isomerization to 1-butene.When the reaction temperature was 360℃and the volume space velocity was 12 h-1,UiO-66-HAC catalyzed double-bond isomerization of 2-butene to 1-butene with a yield of 12.7%and a selectivity of 97%.