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针对Mo-Bi系催化剂作用下的丙烯氨氧化反应过程,采用氧浓度的强制周期振荡操作,根据理论推导和所定义的催化剂表面活性中心分率a,得到了丙烯转化率X及丙烯腈选择性SAN的动态动力学模型如下: X =K×a ?00% SAN=nCa× 100% ()111211221211exp11ppKpKatbpppKpa轾骣骣犏琪=+-+?琪琪犏琪桫+搓?进而结合在不同振荡操作周期、不同振幅条件下所采集到的实验数据,确定了模型参数,并进行优化计算得到最佳的振荡操作条件,丙烯腈周期平均收率达81.1%,比非振荡操作时提高了3.09个百分点。
In view of the ammoxidation of propylene under the action of Mo-Bi catalyst, forced-period oscillation operation of oxygen concentration was adopted. According to the theoretically derived and defined catalyst surface active center fraction a, the propylene conversion X and acrylonitrile selectivity The dynamic model of SAN is as follows: X = K × a → 00% SAN = nCa × 100% () 111211221211exp11ppKpKatbpppKpa 轾 骣 骣 犏 = Qi + + + + Qi Qi Qi Ji 桫 + rubbing ? Operating cycle and experimental data collected under different amplitudes, the parameters of the model were determined and the optimal operating conditions were obtained. The average yield of acrylonitrile cycle was 81.1%, which was 3.09 more than the non-oscillating operation percentage point.