Gas transport mechanisms through new templated silica membranes prepared by sol-gel method

سال انتشار: 1385
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,988

فایل این مقاله در 13 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

NICEC11_272

تاریخ نمایه سازی: 4 اردیبهشت 1386

چکیده مقاله:

Different templated silica membranes were prepared by sol-gel polymerization route using cationic and non-ionic surfactants as template agent. a-alumina support and prepared silica membranes were used in single-gas permeation and mixed-gas separation experiments. Gas transport mechanisms through porous membranes as well as influences of main parameters in each mechanism have been reviewed in details. The characteristics of gas transport through the support as macroporous membrane and templated silica membranes were investigated with several gas diffusion models in the range of 200-400oC and at pressure differences ranging from 0.2 to 1 bar. The experimental gas permeation data of alumina support were analyzed using the viscous flow model and results clearly showed good agreement between the model analysis and the experimental data. The prepared templated asymmetric silica membranes represented different behavior each other due to their different characteristics. The experimental data of silica membrane which templated by polyoxyethylene(4) lauryl ether (Brij30) showed that the permeation followed the Knudsen diffusion model in which the permeance decreased with increasing temperature. The experimental gas permeation data of cetylpyridinium bromide (CPB) templated silica membrane as well as non-templated silica membrane as microporous membranes revealed that they followed the configurational diffusion model in which the permeance increased with temperature. Separation factors obtained from mixed-gas separation experiments with 50/50 (vol%) gas mixtures were slightly lower than the permselectivities

نویسندگان

Pakizeh

Department of Chemical Engineering, Tarbiat Modares University

Omidkhah

Department of Chemical Engineering, Tarbiat Modares University

Zarringhalam

Department of Chemical Engineering, Tarbiat Modares University

Karimzadeh

Department of Chemical Engineering, Tarbiat Modares University

مراجع و منابع این مقاله:

لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :
  • " Tve I ILT ranan _ _ neerng _ ress ...
  • Reid RC, Prausnitz JM, Poling BE, The Properties of Gases ...
  • Xiao J, Wei J, Chem. Eng. Sci., 1992; 47:1 123-1141. ...
  • Burggraaf AJ, Single gas permeation of thin zeolite (MFI) membranes: ...
  • Atkin R, Craig VSJ, Biggs _ Adsorption Kinetics and Structural ...
  • Atkin R, Craig VSJ, Wanless EJ, Biggs S, Mechanism of ...
  • Tsai CY, Tam SU, Lu Y, Brinker CJ, Dual-layer asymmetric ...
  • De Vos RM, Verweij H, Improved performance of silica membranes ...
  • نمایش کامل مراجع