关键词: CeO₂/SiO₂催化剂, 丁烯-1异构化, 内扩散影响

Abstract: The effect of internal diffusion on the kinetics of isomerization of butene-1 over CeO₂/SiO₂catalyst has been investigated in an external circulation gradientless reactor. The isomerization of butene-1 occurred in kinetic region with 30～40 mesh catalyst. When the thickness of catalyst was increased to 4mm, the reaction occurred in internal diffusion region. The effectiveness factors of catalyst were in the range of 0.058～0.12, indicating that the reaction was strongly affected by internal diffusion. The effectiveness factors for isomerization of butene-1 to trans-2-butene were larger than those for isomerization of butene-1 to cis-2-butene. The partial pressure profile of butene-1 in catalyst pore was calculated by the Runge-Kutta method.

Key words: CeO₂/SiO₂catalyst, isomerization of butene-1, effect of intraparticle diffusion