Macrokinetics Studying on Catalyic Sy nthesis of TAME by β Zeolite

Abstract

Abstract:

　 In order to produce environment - friendly new formulated gasoline to meet stricter requirement of environmental protection and to supply the data for the development of β zeolite catalyst and the design of reactor , the macrokinetics of TAME liquid -phase synthesis catalyzed by β zeolite was studied, where isoamylene was etherified with methano l.Two -compo nent modified β zeo lite molecular sieve(mass fraction of phosphorus is 1 % and mass fraction of molybdenum is 3%)was used as catalyst to synthesize TAME with methanol and isoamylene in the batch reactor without the effect of internal diffusion or external diffusion .The kinetic experimental data is obtained at the temperature range from 60 ℃ to 90 ℃ and the pressure 1.0MPa .According to Arrehenius equation and adopting the no nlinear fitting method to deal the experimental data , macrokinetic equation is obtained .The verification of the model shows that the macrokinetic equation of etherification of tert -olefins and kinetic parameters can well describe the process of the etherification reaction.

Key words: 　&beta, Zeolite , 　TAME, 　Etherification , 　Macro kinetics

摘要： 　为了生产有利于环境友好的新配方汽油, 以适应环境保护的更高要求, 为β 沸石分子筛催化剂的开发和反应器的设计提供数据, 对异戊烯和甲醇在β 沸石分子筛催化剂作用下合成TAME 液相醚化反应的宏观动力学进行了研究。采用双组分改性的β 沸石分子筛(磷的质量分数为1 %, 钼的质量分数为3 %)作催化剂, 在考察并消除了内外扩散影响的条件下, 温度为60 ～ 90 ℃, 在间歇式反应釜内保持压力为1 .0 MPa , 甲醇与异戊烯合成TAM E,得到动力学实验数据。根据Arrehenius 方程, 采用非线性拟合方法处理实验数据, 得到了宏观动力学方程。通过对模型的验证表明, 得到的叔碳烯烃醚化反应宏观动力学方程及动力学参数能较好的描述醚化反应过程。

关键词: &beta, 沸石, 　TAME , 　醚化, 　宏观动力学

CLC Number:

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WANG Li,WANG Hai -y an,CHEN Jin -peng. Macrokinetics Studying on Catalyic Sy nthesis of TAME by β Zeolite[J]. Journal of Liaoning Petrochemical University, 2006, 26(1): 45-47.

王　莉, 王海彦, 陈金鹏. β 沸石催化合成TAME 的宏观动力学[J]. 辽宁石油化工大学学报, 2006, 26(1): 45-47.

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Macrokinetics Studying on Catalyic Sy nthesis of TAME by β Zeolite

β 沸石催化合成TAME 的宏观动力学

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