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用外循环流动玻璃无梯度反应器研究了ＣｅＯ＿２／ＳｉＯ＿２催化剂上丁烯－１异构化动力学的内扩散影响。当用３０～４０目催化剂时丁烯－１异构化在动力学区域。当催化剂厚度增大到４ｍｍ时反应在内扩散区域进行。催化剂有效因子在０．０５８～０．１２之间，说明内扩散影响严重。丁烯－１异构成ｃ－２－丁烯的催化剂有效因子比丁烯－１异构成ｔ－２－丁烯的要小。用Ｒｕｎｇｅ－Ｋｕｔｔａ方法计算了丁烯－１在催化剂孔内的分压分布。
The influence of internal diffusion on the isomerization kinetics of butene-1 on CeO_2 / SiO_2 catalyst was investigated by an external circulation flow glass gradientless reactor. Butene-1 isomerizes in the kinetic region when 30-40 mesh catalyst is used. The reaction proceeds in the inner diffusion zone as the catalyst thickness increases to 4 mm. The effective factor of the catalyst is between 0.058 and 0.12, indicating that the internal diffusion has a serious impact. The effective catalyst of isobutene-1 isomerization to c-2-butene is smaller than the isomerization of butene-1 to t-2-butene. The Runge-Kutta method was used to calculate the partial pressure distribution of butene-1 in the catalyst pores.