Optimizing CO2/CH4 Separation Performance of Modified Thin Film Composite Pebax MH 1657 Membrane Using a Statistical Experimental Design Technique

Document Type : Original Article


Department of Safety Engineering, University of Science and Culture, P.O. Box 13145-871, Tehran, Iran


In this research, statistically based experimental design (central composite design, CCD) was applied to analyze and optimize the effect of PEG-ran-PPG (10–50 wt%) as a blending polymer and CuBTC (0–20 wt%) which is a metal organic framework (MOF) as a nano filler on the CO2 permeance and CO2/CH4 ideal selectivity of Pebax MH 1657/polysulfone thin film composite membrane. In fact, the beneficial properties of polymer blending and mixed matrix membranes (MMMs) have been combined. Based on the regression coefficients of the obtained models, the CO2 permeance was notably influenced by PEG-ran-PPG mass content, while the mass content of CuBTC has the most significant effect on the CO2/CH4 ideal selectivity. Experimental and statistical results showed that under the optimum conditions (PEG-ran-PPG: 32.76 wt% and CuBTC: 20 wt%), nearly 620% increase in the CO2 permeance and 43% enhancement in the CO2/CH4 ideal selectivity was observed compared to the neat Pebax membranes.


Main Subjects

Article Title [Persian]

بهینه سازی عملکرد جداسازی غشای بهبود یافته لایه نازک کامپوزیتی Pebax MH 1657 با استفاده از روش طراحی آزمایش

Author [Persian]

  • طیبه خسروی

گروه مهندسی ایمنی، دانشگاه علم و فرهنگ، صندوق پستی 13145871، تهران، ایران

Abstract [Persian]

در این پژوهش، روش طراحی آزمایش CCD به منظور بهینه­سازی و تجزیه و تحلیل اثر افزودن پلیمر PEG-ran-PPG (10-50 wt%) بعنوان پلیمر آلیاژکار و ذرات CuBTC (0–20 wt%) که یک نوع MOF بوده بعنوان نانوذرات بر روی تراوایی گاز CO2 و گزینش­پذیری CO2/CH4 غشای لایه نازک کامپوزیتی Pebax MH 1657/polysulfone  مورد استفاده قرار گرفته است. در حقیقت خصوصیات مثبت آلیاژکاری و غشاهای ماتریس آمیخته بصورت همزمان در این پژوهش مورد استفاده قرار گرفته است. بر اساس ضرایب مدل برازش، درصد وزنی PEG-ran-PPG اثر زیادی بر روی تراوایی CO2 داشته درحالیکه درصد وزنی CuBTC بیشترین تاثیر را بر روی گزینش­پذیری CO2/CH4 داشته است. نتایج آزمایشگاهی و آماری نشان دادند که تحت شرایط بهینه (PEG-ran-PPG: 32.76 wt% and CuBTC: 20 wt%)، تراوایی CO2 تقریبا 620 درصد و گزینش­پذیری CO2/CH4 حدود 43 درصد در مقایسه با غشای Pebax افزایش پیدا کرد.

Keywords [Persian]

  • جداسازی دی اکسید کربن
  • Pebax
  • غشای کامپپوزیتی
  • روش طراحی آزمایش CCD
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