摘要
采用积分式反应器,在反应温度,原料气的氧烯比较大的变化范围内,考察了丙烯氨氧化的反应特性,确定复杂反应的同络;根据 Redox 反应机理,同时引入表征催化剂表面状态特性的β,θ_(OA)和θ_(OW)等变量,建立了丙烯氨氧化反应的动力学模型,获得12个模型参数估计值均具有明确的物理意义和良好的拟合精度。
The reaction characteristics of ammoxidation of propylene on multicomponent Mo-Bi-O catalyst has been investigated in an integral reactor under isothremal conditions(415℃ to 465℃) and with feeds of different NH_3/C_3H_6 ratios(1.13 to 1.26) and O_2/C_3H_6 ratios(1.02 to 2.23). The reaction network of this complex system has been established by analysing the variations of the selectivity of various substances with propylene conversion.On the basis of“Redox”mechanism which leads to the concepts of fractional surface active center(β),selective(0_(OA))and non-selective (0_(OW))lattice oxygen of the catalyst,a kinetic model was proposed with clear physical sense and it gives the best fit to the experimental data.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
1993年第4期345-352,共8页
Chemical Reaction Engineering and Technology
关键词
丙烯
丙烯腈
氨氧化
反应网络
Propylene
Acrylonitrile
Ammoxidation
Reaction network
Kinetic model
