叔丁醇溶剂中TS-1催化丙烯环氧化的动力学研究(英文)  

KINETICS OF PROPYLENE EPOXIDATION OVER TS-1 IN t-BUTYL ALCOHOL

作　　者：梁新华[1] 米镇涛[1] 吴玉龙[1] 邢恩会[1] 王莅[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《燃料化学学报》2003年第6期639-643,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金 (2 9792 0 70 );国家重点基础研究发展规划 (973 )(G2 0 0 0 480 0 5)~~

摘　　要：研究了叔丁醇溶剂中TS 1催化丙烯环氧化反应的本征动力学,反应条件为:温度303 15K～323 15K,丙稀压力0 3MPa～0 6MPa。根据反应机理及组分在TS 1上的吸附特点建立了如下的机理模型方程式:rcal=kK1CH2O2CC3H61+K1CH2O2+K2CC3H6+K3CPO　　根据实验数据,我们对机理模型进行了参数估值。检验结果表明拟合效果较好,反应符合Eley Rideal机理,丙烯环氧化反应发生在吸附态的过氧化氢与游离态的丙烯之间。The intrinsic kinetics of propylene epoxidation with H_2O_2 over TS-1 in t-butyl alcohol/water system was investigated. The reaction was carried out at T=303.15?K～323.15?K, p=0.3?MPa～0.6?MPa. Based on the proposed reaction mechanism and adsorption characteristics, the kinetic model was established as follows:r_(cal)=kK_1C_(H_2O_2)C_(C_3H_6)1+K_1C_(H_2O_2)+K_2C_(C_3H_6)+K_3C_(PO)based on the experimental data, the model parameters were estimated. The results showed that the Eley-Rideal model could fit precisely with the experimental data, and the reaction takes place between H_2O_2 adsorbed on Ti active sites and propylene in free state.

关 键 词：钛硅分子筛 环氧丙烷 叔丁醇 本征动力学 TS—1催化 丙烯 环氧化 反应动力学 

分 类 号：O623.42[理学—有机化学]