Adsorption, diffusion and catalysis of mesostructured zeolite HZSM-5

作者：Liu, Zhiping; Fan, Weiming; Ma, Jinghong; Li, Ruifeng^*

来源：Adsorption, 2012, 18(5-6): 493-501.

DOI：10.1007/s10450-012-9439-6

• Mesostructured zeolite HZSM-5
• Adsorption isotherm
• Diffusion kinetics
• Activation energy

Adsorption and diffusion properties of n-octane in meso-structured HZSM-5 zeolites were studied by high precision intelligent gravimetric analysis (IGA) and ZLC technology between 293 K and 393 K. As expected, great increase in adsorption capacity and diffusion efficient of n-octane in the mesostructured HZSM-5 zeolites was observed compared with conventional HZSM-5. At the same time, the adsorption activation energy of n-octane in the mesostructured HZSM-5 zeolites was significantly decreased. The adsorption heats with low n-octane loading showed a clear decline with increase of mesoporosity in the zeolite samples. These results clearly indicate that introduction of mesopores into the zeolites offered a short diffusion path and high diffusion rate for reactants and products, which resulted in a high yield of fuel oil and an enhanced resistance against the catalyst deactivation in the reaction of methanol to gasoline.

• 出版日期2012-12
• 单位太原理工大学