C_4烷烃在ZSM-5分子筛和Y分子筛上的吸附和扩散研究  

Study on adsorption and diffusion of C_4 alkanes in ZSM-5 and Y zeolites

作　　者：张佳佳[1] 赵震[1] 段爱军[1] 姜桂元[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《工业催化》2007年第9期5-9,共5页Industrial Catalysis

基　　金：国家重点基础研究发展规划项目(2004BC217806和2005CB221402)

摘　　要：采用气相色谱法研究了正丁烷和异丁烷在ZSM-5分子筛和Y分子筛上的扩散性能。烃分子的吸附平衡常数随温度的升高而降低,而扩散系数随温度的升高而增大。研究发现,烃分子的有效分子直径和分子形状是决定其扩散快慢的主要因素,同时分子筛孔道的大小对烃分子的扩散也存在影响,分子筛孔道越大,烃分子的扩散越快。The adsorption/diffusion of n-butane or chromatography（GC）. The adsorption equilibrium isobutane in ZSM-5 and Y zeolites were measured by constants decreased with the temperature, while the diffusivity increased with temperature. The effective molecular diameter and molecular configuration were determining factors for adsorption/diffusion. Pore size of the zeolite also had influence on the adsorption/ diffusion. The diffusivity increased with increasing pore size.

关 键 词：扩散系数 分子筛 气相色谱法 C4烷烃 ZSM-5 

分 类 号：O643.36[理学—物理化学] TQ624.9[理学—化学]