快速流化床反应器用于丁烯氧化脱氢制取丁二烯的宏观动力学研究

THE MACROKINETIC STUDY ON THE OXIDATIVE DEHYDROGENATION OF BUTENE TO PRODUCE BUTADIENE

本工作是在内径为26mm 的快速流化床反应器中,以丁烯氧化脱氢制取丁二烯的过程为内容,在330℃～370℃的温度范围内进行了宏观动力学研究。根据快速流化床的流动特性,以气相为基础,对其实验结果采用了拟均相模型处理,求得总反应转化率表达式 X_A=1-exp(-kτ),其中反应速度常数 K=1.123×10~4exp[-42990.70/RT],总的反应表观活化能 E=4.299×10~4(J/mol).同时还计算了主付反应的下列参数:k_1=1.133×10~4exp[-4.339×10~4/RT]k_2=2.511×10~2exp[-3.739×10~4/RT]E_1=4.339×10~4 J/molE_2=3.739×10~4 J/mol并以下列方程组:k_1,k_2x_A=1-exp[-(k_1+k_2)ετ]y_Q=(k_1/k_1+k_2)·X_A来予测反应过程中丁烯的转化率及丁二烯的收率情况,用此方法计算的结果与实验值之相对误差均在±8%范围以内。

The macrokinetic study on the oxidative dehydrogenation of butene to produce butadiene by Fe-catalyst was conducted in a fast fluidized bed reactor with 26 mm I.D. The reaction temperature of all these studies was in the range of 330— 370℃.According to the distribution of the reaction products and the charac- teristics of fast bed reaetor,a parallel first order reaction mechanism was assumed and homogeneous model was used to estimate the overall reaction constant k,parallel reaction constant k_1 and k_2,and...