تهیه غشاهای شبکه آمیخته بر پایه پلی‌وینیل کلراید و سلولز استات پرشده با نانولوله‌های کربنی در جداسازی گازهای CO2ا، CH4 و N2

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه اراک

چکیده

در این پژوهش، غشاهای شبکه آمیخته پلی وینیل کلراید- نانولوله‌های کربنی (PVC/MWCNTs) و سلولزاستات– نانولوله‌های کربنی (CA/MWCNTs) تهیه شد و به منظور بررسی خواص جداسازی گاز، مورد ارزیابی قرار گرفت. برای این منظور هر دو نوع نانولوله‌های کربنی بدون عامل و عامل‌دار (با عامل کربوکسیلیک) مورد استفاده قرار گرفت. در نهایت مشخص شد که نانولوله‌های عامل‌دار، عملکرد بهتری دارند. اثر افزایش محتوای نانولوله‌های کربنی بر عملکرد جداسازی گاز غشاهای تهیه شده برای گازهای هلیم، نیتروژن، متان و دی‌اکسید‌کربن مورد بررسی قرار گرفت. نتایج به دست آمده نشان می‌دهد تراوایی گازها با افزایش محتوای نانولوله‌های کربنی، افزایش می‌یابد. تراوایی دی‌اکسید‌کربن نسبت به سایر گازهای مورد مطالعه، افزایش بیشتری دارد و در 1% وزنی از نانولوله‌های کربنی عامل‌دار، برای غشاهای شبکه آمیخته شامل PVC به barrer 48/11 و برای غشاهای شبکه آمیخته شامل CA در 5% وزنی از نانولوله های کربنی به barrer 21/14 رسیده است. علاوه بر این، گزینش‌پذیری CO2/CH4 به‌طور کلی نتایج بهتری را در پی داشته و در 3% وزنی از نانولوله‌های کربنی عامل‌دار، در غشاهای تهیه شده بر پایه PVC به بیشترین مقدار خود (حدود barrer 76/52) رسید. همچنین نتایج آزمون مقاومت مکانیکی نشان می‌دهد که استفاده از غشاهای شبکه آمیخته بر پایه PVC، خواص مکانیکی مطلوب‌تری دارد
 

کلیدواژه‌ها

عنوان مقاله [English]

Fabrication of PVC/CA -based Mixed Matrix Membranes Filled with Multiwalled Carbon Nanotubes for CO2, CH4, and N2 Gases Separation

نویسندگان [English]

  • Zahra Rajabi
  • Abdolreza Moghadassi
  • Maryam Mohammadi
  • Sayed Mohsen Hosseini
Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak
چکیده [English]

PVC/MWCNT’s and CA/MWCNT’s mixed matrix membranes (MMM’s) were prepared. These membranes were characterized for the investigation of gas separation properties. For this reason, both raw and functionalized multiwalled carbon nanotubes (MWCNT’s) were used. At last, it is understood that membranes filled with functionalized MWCNT’s had better performance. The effects of MWCNT’s loading ratio were investigated on the gas separation performance of the prepared membranes for He, N2, CH4, and CO2 gases. The results represented that all gases permeability had an increasing manner with increasing the nanofiller loading ratio. CO2 permeability were more increased and at 1 wt.% of MWCNT’s for MMM’s based on PVC, and at 5 wt.% of MWCNT’s for MMM’s based on CA, this value reaches 11.48 and 14.21 respectively. Moreover, CO2/CH4 gas separation selectivity showed better results and at 3 wt.% of MWCNT’s reaches its maximum value (52.76). Also, the results of mechanical resistance analysis represented that MMM’s based on PVC have better mechanical properties than MMM’s based on CA
 

کلیدواژه‌ها [English]

  • Mixed Matrix Membranes
  • Gas Separation
  • Carbon Nanotubes
  • Permeability
  • Selectivity
  • Mechanical Properties

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