مهندسی شیمی ایران

مهندسی شیمی ایران

سنتز، مشخصه‌یابی و بررسی عملکرد غشای زئولیتی Mordenite Framework Inverted (MFI) مزومتخلخل‌شده با کربن سیاه در عبوردهی آب

نوع مقاله : مقاله پژوهشی

نویسندگان
1 کارشناسى ارشد مهندسى شیمى، دانشگاه صنعتى سهند تبریز
2 استادیار مهندسى شیمى، دانشگاه صنعتى سهند تبریز
چکیده
هدف از این تحقیق، ایجاد ساختار مزومتخلخل در لایۀ غشایی زئولیت MFI و افزایش قطر حفره‌ها در آن، برای افزایش میزان عبوردهی آب است. ایجاد ساختار مزومتخلخل با اضافهکردن کربن سیاه به محلول سنتز لایهغشایی در روش هیدروترمال درجا انجام شد. آنالیزهای X Ray Diffraction (XRD)، Scanning Electron Microscopy (SEM)، Berner-Emmett-Taylor (BET) و آزمون عبوردهی گاز نیتروژن برای مشخصهیابی و آزمون عبوردهی آب برای بررسی عملکرد استفادهشد. نتایج، نشاندهندۀ سنتز موفقیتآمیز لایۀ غشای زئولیتی MFI با بلورینگی مناسب برروی پایۀ آلفا- آلومینا با ضخامت حدود µm 15 و اندازۀ حفره‌های بین nm 4/5-20 است که بیشترین مقدار حفره‌های مزو قطر nm 7/4 دارند. قطر حفره‌ها درمقایسهبا سنتز بدون حضور کربن سیاه 10 برابر افزایش یافتهاست. نتایج آزمون عبوردهی آب نشان داد که افزایش اندازۀ حفره‌های غشا بااستفادهاز کربن سیاه توانسته میزان عبوردهی آب در غشا (26L/m2.hr ) را تا 75-14 برابر نسبتبه غشاهای میکرومتخلخل (L/m2.hr 74/1-35/0)      افزایش دهد. بررسی عبوردهی غشا برای آب حاوی مواد جامد محلول بعد از گذشت 2 ساعت نشان داد که میزان عبوردهی آب برای غشای مزومتخلخل (L/m2.hr 12) همچنان نسبتبه غشاهای میکرومتخلخل بالاتر است.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Synthesis, Characterization and Performance Evaluation of Mesoporous Mordenite Framework Inverted (MFI) Zeolite Membrane by Carbon Black in Water Permeability

نویسندگان English

S. Abdolkarimpour 1
R. Khoshbouy 2
M. J. Vaezi 2
1 M. Sc. in Chemical Engineering, Sahand University of Technology
2 Assistant Professor of Chemical Engineering, Sahand University of Technology
چکیده English

The aim of this research is creating a mesoporous structure in the MFI zeolite membrane layer and increase the pores diameter in order to increase the water permeability. The mesoporous structure was created by adding carbon black to the synthesis solution of the membrane in the in-situ hydrothermal method. The X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Berner-Emmett-Taylor (BET) and nitrogen gas permeability tests were used to characterize and the water permeation test was used to investigate the performance. The results showed the successful synthesis of the MFI zeolite membrane layer with proper crystallinity on the α-alumina support with the thickness of about 15 µm and the pore size between 4.5-20 nm, so that the largest amount of meso-pores had a diameter of 7.4 nm. The diameter of the pores has increased by 10 times compared to the synthesis without the presence of carbon black. The results of the water permeation test showed that increasing the the pores diameter using carbon black could increase the water flux of the membrane (26 L/m2.hr) up to 14-75 times compared to microporous membranes (0.35-1.74 L/m2.hr). Investigating the water flux of the membrane for water containing dissolved solids showed that the water flux of the mesoporous membrane (12 L/m2.hr) is still higher than the microporous membranes after 2 hr.

کلیدواژه‌ها English

MFI Zeolite Membrane
Mesoprous Structure
Carbon Black
Pore Diameter
Water Permeation

 

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