CAJ | 학술논문

添加不同组分对氧化铝载体进行调变改性，再以改性氧化铝为载体，负载KI制备了一系列负载型催化剂KI/Al2O3-MgO、KI/Al2O3-ZnO、KI/Al2O3-TiO2和KI/Al2O3-ZrO2，并通过CO2、环氧丙烷和甘油合成甘油碳酸酯反应评价其催化活性，发现 KI/Al2O3-MgO具有最高的活性。由不同载体的 CO2-TPD分析可以发现，载体表面少量碱性位的存在有利于反应进行。实验研究了不同负载量KI/Al2O3-MgO的活性及稳定性，发现KI负载量为1.5mmol/g 较为适宜。同时，实验又通过 N2吸附/脱附（BET）、X 射线衍射（XRD）等手段对不同负载量的KI/Al2O3-MgO进行了表征，进一步说明了负载量过多会导致KI晶粒团聚，并阻塞载体孔道。优化了反应条件，在最佳条件下（环氧丙烷0.3mol，甘油0.1mol，反应温度130℃，反应时间2h，反应压力6.0MPa），甘油的转化率为65.5%，甘油碳酸酯的产率为60.8%。
첨가불동조분대양화려재체진행조변개성，재이개성양화려위재체，부재KI제비료일계렬부재형최화제KI/Al2O3-MgO、KI/Al2O3-ZnO、KI/Al2O3-TiO2화KI/Al2O3-ZrO2，병통과CO2、배양병완화감유합성감유탄산지반응평개기최화활성，발현 KI/Al2O3-MgO구유최고적활성。유불동재체적 CO2-TPD분석가이발현，재체표면소량감성위적존재유리우반응진행。실험연구료불동부재량KI/Al2O3-MgO적활성급은정성，발현KI부재량위1.5mmol/g 교위괄의。동시，실험우통과 N2흡부/탈부（BET）、X 사선연사（XRD）등수단대불동부재량적KI/Al2O3-MgO진행료표정，진일보설명료부재량과다회도치KI정립단취，병조새재체공도。우화료반응조건，재최가조건하（배양병완0.3mol，감유0.1mol，반응온도130℃，반응시간2h，반응압력6.0MPa），감유적전화솔위65.5%，감유탄산지적산솔위60.8%。
Different components were chosen to modify alumina and then KI was loaded on the surface of modified alumina,and a series of supported KI catalysts were prepared,such as KI/Al2O3-MgO, KI/Al2O3-ZnO,KI/Al2O3-TiO2 and KI/Al2O3-ZrO2. The catalytic activities were evaluated by the reaction of CO2,propylene epoxide and glycerol to synthesize glycerol carbonate and KI/Al2O3-MgO was found to be the best one. Through CO2-TPD of diffirent supports,it could be found that a few basic positions on the surface of supports were favorable to the reaction. The catalytic activity and stability of KI/Al2O3-MgO with different loading amounts were investigated and the optimal loading amount of KI was 1.5mmol/g. At the same time,KI/Al2O3-MgO was characterized by N2adsorption/desorption (BET) and X ray diffraction (XRD). Overfull loading amount could lead to agglomeration of KI crystals and blockage of support pores. Reaction conditions were optimized. Under the optimal conditions (propylene oxide 0.3mol,glycerol 0.1mol,reaction temperature 130℃,reaction time 2h,and reaction pressure 6.0MPa),conversion of glycerol was 65.5% and yield of glycerol carbonate was 60.8%.