Adsorption and Diffusion of n-Hexane/2-Methylpentane Mixtures in Zeolite Silicalite: Experiments and Modeling

摘要: With the tracer-exchange positron emission profiling (TEX-PEP) technique, reexchange process of radioactively labeled molecules with a steady-state feed stream can be measured inside zeolite-packed bed reactor. When experimental curves are modeled, values for micropore diffusion and adsorption constant obtained. As one choose which component to label, this technique is ideally suited studying multicomponent diffusion. In present study, has been used measure diffusive adsorptive properties an n-hexane/2-methylpentane mixture in zeolite silicalite. The measurements were performed at different ratios n-hexane 2-methylpentane gas phase total hydrocarbon pressure 6.6 kPa temperature 433 K. A slight preference was found because it entropically more favorable adsorb these as they have no preferential siting pores. diffusivity th...