تهیه و ارزیابی غشاهای شبکه آمیخته پلی وینیل کلراید-نانوذرات اکسیدروی به منظور جداسازی CO2 /N2 ،ا CO2/CH4 و N2/CH4

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه اراک، دانشکده فنی و مهندسی، گروه مهندسی شیمی

چکیده

در این پژوهش غشاهای شبکه آمیخته پلی وینیل کلراید- نانوذرات اکسیدروی تهیه شده و به منظور بررسی خواص جداسازی گاز، مورد ارزیابی قرار گرفتند. اثر افزایش اکسید روی و نیز فشار خوراک بر عملکرد جداسازی گاز این غشاها برای گازهای هلیم، نیتروژن، متان و دی اکسید کربن مورد بررسی قرار گرفت. نتایج به دست آمده نشان می‏دهد که تراوایی همه گازها با افزایش نانوذرات اکسیدروی روند افزایشی داشته است. تراوایی گازهای هلیم، متان، دی اکسید کربن و نیتروژن در غشاهای شبکه آمیخته حاوی 15% وزنی اکسید روی در فشار bar 8، به ترتیب از 56/3، 007/0، 21/0 و 01/0 به 9/49، 12، 4/26 و 6/1 نسبت به غشاهای بدون نانو ذرات افزایش یافته است. همچنین، تراوایی هر یک از گازهای مورد مطالعه با افزایش فشار خوراک ورودی، افزایش یافته و انتخاب پذیری جفت‏های گازی مذکور با افزایش فشار، روند ‌کاهشی را دنبال کرده است. نتایج آزمون مقاومت مکانیکی نشان می‏دهد که استفاده از نانوذرات اکسید روی در ساختار غشا توانسته است مدول کششی را به میزان 11% بهبود دهد.
 

کلیدواژه‌ها

عنوان مقاله [English]

Preparing and Characterizing PVC/ZnO Nanoparticle Mixed Matrix Membranes for CO2/N2, CO2/CH4, and N2/CH4 Gas Separation

نویسندگان [English]

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

PVC/ZnO mixed matrix membranes were prepared and characterized for gas separation properties. The effects of ZnO loading ratio and feed pressure on the gas separation performance of the prepared membranes were investigated. Testing gases were He, N2, CH4, and CO2. The results indicated that the permeability of all the gases increased with an increase in ZnO loading ratio. At a ZnO loading ratio of 15% and a pressure of 8 bar, the permeability of He, N2, CH4, CO2 increased from 3.56, 0.01, 0.007, 0.21 to 49.9, 1.6, 12, 26.4 respectively. Moreover, the permeability of the studying gases showed an increasing manner. The selectivity of pair gases (CO2/N2), (CO2/CH4), and (N2/CH4) decreased with an increase in feed pressure. Furthermore, the mechanical properties analysis of the prepared membranes showed that the presence of ZnO nanoparticles in membrane structure night improve tensile module.
 

کلیدواژه‌ها [English]

  • Mixed Matrix Membranes
  • Polyvinyl Chloride
  • ZnO Nanoparticles
  • Gas Separation
  • Permeability
  • Selectivity
  • Feed Pressure

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