【摘要】 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=1.123×10⁴exp[-42990.70/RT],总的反应表观活化能 E=4.299×10⁴（J/mol）.同时还计算了主付反应的下列参数:k₁=1.133×10⁴exp[-4.339×10⁴/RT]k₂=2.511×10²exp[-3.739×10⁴/RT]E₁=4.339×10⁴ J/molE₂=3.739×10⁴ J/mol并以下列方程组:k₁,k₂x_A=1-exp[-（k₁+k₂）ετ]y_Q=（k₁/k₁+k₂）·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。更多还原

【Abstract】 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 k₁ and k₂,and their related free energies E,E₁ and E₂,based on the experimental results obtained from side line sampling along the axial direction of the riser. The results are: k=1.123×10⁴exp（-42990.70/RT） E=4.299×10⁴ （J/mol） k₁=1.133×10⁴exp（-3.739×10⁴/RT） k₂=2.511×10²exp（-3.739×10⁴/RT） E₁=4.399×10⁴ （J/mol） E₂=3.739×10⁴ （J/mol） From the comparison of predicted results to the experimental data,the deviation was found to be less than ±8%.更多还原