丙烯直接气相环氧化反应中原料气组成优化的研究

Optimization of Composition of Feeding Gas for Direct Epoxidation of Propene

针对丙烯直接环氧化过程中原料气组成存在的问题,即大量稀释气以及O2无法完全转化,通过计算无稀释气条件下O2、H2和C3H6混合气体的爆炸限数据,得出O2体积含量的安全范围(≤10%),移除了稀释气;通过考察了O2体积含量及H2/C3H6体积比对反应的影响,确定最优原料气组成为H2/O2/C3H6=62%/7%/31%,使O2在反应过程中全部转化。并在此基础上研究了温度、压力和空速对反应的影响,探究了催化剂失活的原因。

Aiming at the problems existing in composition of feeding gas for the process of direct epoxidation of propene, namely, the big percentage of N2 and incomplete conversion of O2 , by calculating the explosive limits of O2 , H2 and C3H6 , safety O2 volumetric content(≤10%) has been found and the diluent gas has been removed. By investigating the influences exerted by O2 content and H2 /C3H6 ratio on the process, the optimal composition of feeding gas has been acquired, i.e. H2/O2/C3H6 =62%/7%/31%, so as to completely utilize O2 during the process. The influences of reaction conditions and reasons that cause deactivation have also been investigated.