مهندسی شیمی ایران

مهندسی شیمی ایران

غشای زمینه‌مختلط PEBA حاوی صفحات دوبعدیماکرومتخلخلFeTiO2 برای جداسازی CO2

نوع مقاله : مقاله پژوهشی

نویسندگان
استادیار مهندسی شیمی، دانشگاه صنعتی خاتمالأنبیاء بهبهان
چکیده
در این تحقیق، صفحات ماکرومتخلخل TiO2 دوپهشدهبا آهن، سنتزشد و بهزمینۀ پلیاتربلاکآمید (PEBA) اضافهشد. ریختمان، ساختار شیمیایی، رفتار حرارتی، بلورینگی، استحکام مکانیکی و خواص جداسازی غشاهای تهیهشده، مطالعه‌شد. نتایج نشانداد که صفحات FeTiO2 با برقراری پیوندهای فیزیکی با زنجیر پلیمری باعث افزایش استحکام مکانیکی آن شد. این صفحات، به‌وسیلۀ مراکز اسید لوئیسی باعث ایجاد سازوکار انتقال تسهیلیافته شد و عبوردهی CO2 را افزایشداد، اگرچه به‌دلیل برقراری پیوندهای هیدروژنی زمینۀ پلیمری سفتشد و سازوکار انتقال تسهیلیافته در غشای بهینه تنها توانست عبوردهی CO2 را 12/4 درصد نسبتبه غشای خالص افزایشدهد. ازطرف دیگر، سفتی زمینۀ پلیمری باعث کاهش عبوردهی N2 شد و باعث افزایش 136 درصدی انتخابگری CO2/N2 در غشای بهینه درمقایسهبا غشای خالص شد، بهطوریکه توانست از خط بالایی رابسون به‌آسانی عبورکند.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

PEBA Mixed Matrix Membranes Containing 2D Macroporous FeTiO2 Sheets for the Separation of CO2

نویسندگان English

.M Elyasi Kojabad
.E Bekhradinasab
Assistant Professor of Chemical Engineering, Behbahan Khatam Alanbia University of Technology
چکیده English

This study involved the synthesis of iron-doped macroporous TiO2 sheets, which were subsequently incorporated into a polyether block amide (PEBA) matrix. The investigation focused on various properties ofthe resulting membranes, including morphology, chemical structure, thermal behavior, crystallinity, mechanical strength, and separation characteristics. The findings indicated that the incorporation of FeTiO2 sheets enhanced the mechanical strength of the membranes by forming physical bonds with the polymer chains. Additionally, these sheets created facilitated transport mechanism through Lewis acid centers, resulting in an increase in CO2 permeability. However, the formation of hydrogen bonds led to a stiffening of the polymer matrix, which limited the enhancement of CO2 permeability to 12.4% in the optimal membrane compared to the pure membrane. Conversely, the increased stiffness of the polymer matrix reduced N2 permeability while enhancing CO2/N2 selectivity by 136% in the optimal membrane relative to the pure membrane, thereby allowing it to surpass the upper Robson line

کلیدواژه‌ها English

Membrane
Polyether Block Amide
Fe-Doped TiO2
Facilitated Transport Mechanism

 

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