摘要
在常压、３２８～３４８Ｋ温度范围内，研究了用ＨＺＳＭ－５ 沸石分子筛作催化剂的乙酸乙酯催化水解宏观反应动力学， 建立了动力学模型。研究了水酯比、反应温度和催化剂浓度等因素对催化水解的影响。实验数据采用拟均相二级反应动力学模型进行回归，得出乙酸乙酯催化水解的正逆反应活化能为２８．５ｋＪ·ｍ ｏｌ－ １和２２．５ｋＪ．ｍ ｏｌ－ １。与催化剂浓度关联的最终速率表达式为：Ｋ＋ ＝ （７．２８５７９×１０－ ９Ｃ－ ４．３６３７２×１０－ ７）ｅｘｐ（－ ３．４２８／Ｔ）Ｋ－ ＝ （７．８１４６５×１０－ ９Ｃ－ ３．５１２８５×１０－ ７）ｅｘｐ（－ ２．７０６／Ｔ）
The model is built on the basis of macrokinetics for acetic ether catalytic hydrolytic decomposition with HZSM 5 zeolite molecular sieve. The influence of catalytic hydrolytic decomposition is studied on some factors such as ester water ratio, reaction tempreature and catalytic concentration. E +=28.5 kJ/mol ,activation energy of positive reaction and E =22.5kJ/mol, activation energy of negative reaction for acetic ether catalytic hydrolytic dccomposition are obtained through computing simulation experimental data by kinetic model of second order reaction in pseudo homogeneous phase. The final rate formulas are: K + =(7.28579×10 -9 C -4.36372× 10 -7 )exp(-3.439/ T) K - =(7.81465×10 -9 C -3.51285× 10 -7 )exp(-2.706/ T)
出处
《青岛化工学院学报（自然科学版）》
1999年第2期142-146,共5页
Journal of Qingdao Institute of Chemical Technology(Natural Science Edition)
