The capture and fixation of CO₂ can effectively alleviate greenhouse effect. Propylene carbonate is a highly efficient solvent, which can be used as an excellent medium for lithium battery. It is of great significance to convert CO₂ into propylene carbonate. In this paper, ionic liquid BMImBr was immobilized into the pores of SBA-15 by supercritical deposition, and BMImBr@SBA-15 was obtained for catalytic conversion of CO₂. The catalytic properties of BMImBr and BMImBr@SBA-15 were investigated by batch method. Then the catalytic performance of supported catalyst BMImBr@SBA-15 was investigated by continuous method, which was carried out in a fixed-bed reactor. The continuous experiments controlled the CO₂ pressure change (0.5–2.0 MPa) when the inlet liquid flow rate was 0.02 mL/min and 0.04 mL/min. Under the conditions of 0.04 mL/min and 1.0 MPa, the yield was the highest (66.14 %). In this paper, through the calculation of the reaction rate constant, it can be concluded that the continuous method can avoid the repeated packing of the catalyst and obtain a higher yield in a short time. It has a broad prospect of industrialization.

_{CO 2}的捕获和固定可以有效缓解温室效应。碳酸丙烯酯是一种高效溶剂，可用作锂电池的优良介质。_{将CO 2}转化为碳酸亚丙酯具有重要意义。本文通过超临界沉积将离子液体BMImBr固定在SBA-15的孔隙中，获得了用于催化CO ₂转化的BMImBr@SBA-15 。采用间歇法研究了BMImBr和BMImBr@SBA-15的催化性能。然后在固定床反应器中采用连续法研究了负载型催化剂BMImBr@SBA-15的催化性能。连续实验控制CO ₂入口液体流速为 0.02 mL/min 和 0.04 mL/min 时的压力变化（0.5-2.0 MPa）。在 0.04 mL/min 和 1.0 MPa 的条件下，产率最高（66.14 %）。本文通过对反应速率常数的计算得出，连续法可以避免催化剂的重复装填，在短时间内获得较高的收率。具有广阔的产业化前景。