论文部分内容阅读
Fe_2O_3-K_2O双组份催化剂在反应温度580～640℃,液体空速0.5～2.5h~(-1),水/乙苯(体积比)1～3范围内乙苯脱氧反应动力学数据。列出主副反应单位或双位吸附的各种反应类型,用线性回归分析法进行判别以确定反应模型和估算各参数值,进一步用数值积分法优化计算不同温度下的反应速度率常数,吸附系数,频率因子和活化能。结果表明:双组份催化剂活性高,但苯乙烯选择性差,副产物苯和甲苯同时从平行反应和联串反应产生,其中大部份来自联串反应,主副反应均用双位吸附单分子反应模型较为合适。
The kinetic data of the deoxygenation reaction of ethylbenzene with Fe 2 O 3 -K 2 O catalyst in the range of 580-640 ℃, liquid space velocity of 0.5-2.5 h -1, water / ethylbenzene (volume ratio) 1-3. The reaction types listed in the primary and secondary reaction units or the double-position reaction were determined by linear regression analysis to determine the reaction model and estimate the value of each parameter. The reaction rate constants at different temperatures were further optimized by numerical integration, Coefficient, frequency factor and activation energy. The results show that the two-component catalyst has high activity but poor selectivity for styrene. The byproduct benzene and toluene are produced from parallel reaction and tandem reaction at the same time. Most of them come from tandem reaction. The reaction model is more suitable.