کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7043834 | 1456921 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of fumed silica content and particle size in poly (amide 6-b-ethylene oxide) mixed matrix membranes for gas separation
ترجمه فارسی عنوان
تأثیر محتوای سیلیس فوم و اندازه ذرات در غشاهای ماتریکس مخلوط پلی (آمید 6-ب-اتیلن اکسید) برای جداسازی گاز
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
Mixed-matrix membranes (MMMs) comprised of poly (amide 6-b-ethylene oxide) (PEBAX) as continuous phase and fumed silica (FS) as dispersed phase were prepared to separate CO2 and CH4. The influences of FS nanoparticle size and weight percentage on the phase behavior and microstructure of the prepared MMMs were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermo-gravimetric analysis (TGA), differential scanning calorimeter (DSC) and tensile testing. The performance of the prepared MMMs was characterized by single gas permeation measurement of CO2, N2 and CH4 (at 25â¯Â°C). The effects of feed pressure on the gas separation performance of the membranes were also investigated. Generally, PEBAX-FS MMMs showed higher CO2 permeability and selectivity (α) than the pure PEBAX membrane. Adding 10â¯wt% of 7â¯nm FS nanoparticles to the PEBAX matrix led to significant improvement in the CO2 permeability (â¼4 times), CO2/CH4 and CO2/N2 selectivity (â¼2 times) compared to the pure PEBAX membrane. The CO2/CH4 and CO2/N2 selectivity for these membranes were also about 64.8% and 45.3% higher than those of MMMs containing 10â¯wt% of larger FS nanoparticles (16â¯nm). This was attributed to the higher surface to volume ratio of smaller FS nanoparticles which can provide higher interactions with polymeric matrix and CO2 gas.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 199, 30 June 2018, Pages 47-56
Journal: Separation and Purification Technology - Volume 199, 30 June 2018, Pages 47-56
نویسندگان
Zahra Aghaei, Leila Naji, Vahid Hadadi Asl, Ghader Khanbabaei, Fahimeh Dezhagah,