外环流气升式反应器中催化丙烯环氧化反应

本论文研究了外环流气升式反应器中TS-1催化丙烯环氧化反应,以单位催化剂空时收率为目标,进行了反应工艺条件的优化,考察了结构参数,上升管与下降管横截面积之比Ar Ad对反应的影响。

Propylene Epoxidation Catalyzed by TS-1 in External Airlift Reactors

In this thesis,propylene epoxidation catalyzed by TS-1 in external airlift reactors was studied. Firstly,the operation parameters were investigated so as to achieve higher yield of propylene oxide per gram catalyst. The optimum results were as follows:The optimum catalyst content was 3%, the preferred liquid and gas flow rates were 2 times of 720mL.h~(-1) and 290mL.min~(-1) respectively.Secondly,the study of the influence of geometry parameter A _r/ A _d was carried out. Under the same ratio of reactor volume to liquid inlet flow rate, conversion, selectivity and yield of propylene oxide per gram catalyst decreased when A _r/ A _d increased. At the same liquid inlet flow rate, the result that conversion,selectivity reduce at a higher degree was obtained,which proved that mass transfer influenced the propylene epoxidation and the mass transfer was affected more by apparent gas velocity than by reaction time.