管式反应器中合成甲基叔戊基醚动力学研究

STUDY ON SYNTHESIS OF TERT-AMYL METHYL ETHER IN TUBULAR REACTOR

分析了异戊烯醚化生成甲基叔戊基醚(TAME)的反应机理及相关的反应动力学模型,在管式反应器中以甲醇和乙烯裂解C5为原料进行醚化反应,分别以R-E,L-H机理建立动力学模型,以醇烯比为1的试验数据为基础进行参数估计,求出了动力学参数。以不同醇烯比时的试验数据对模型进行了辨识,结果表明在醇烯比大于1时,试验数据与两模型预测值均较为吻合,醇烯比小于1时L-H模型拟合效果较好。以建立的L-H模型估算醚化反应在不同空速下的最佳反应温度,以期为工业反应器设计和工艺参数的选择提供参考。

The mechanism and kinetic models of etherifying isoamylene to the tert-amyl methyl ether （TAME） are investigated. Etherification experiments were carried out in a tubular reactor using methanol and C5 cut from steam cracking as reactants. Kinetic models were constructed based on R-E and L-H mechanisms. Kinetics parameters were estimated according to the experimental data at a methanol to isoamylenes （RM/IA ） molar ratio of 1：1. Models were distinguished on different ratios of reactants. The results showed that the two models predicted well when RM/IA was 〉 1. The L-H model was more suitable when RM/IA was 〈 1. The optimum temperatures of etherification at different space velocities were estimated by L-H Model to provide reference for reactor design and operation parameter selection.