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.
出处
《工业催化》
CAS
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)
