کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
626772 1455450 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of carbon molecular sieve membranes for gas separation-the effect of incorporated multi-wall carbon nanotubes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Preparation and characterization of carbon molecular sieve membranes for gas separation-the effect of incorporated multi-wall carbon nanotubes
چکیده انگلیسی
A new class of multi-wall carbon nanotubes (MWCNTs)/carbon nanocomposite thin films was successfully prepared by incorporating (MWCNTs) into polyimide (PI) precursor solution. The carbon films were obtained in only one coating step by spin-coating technique on a macroporous alumina substrate and were pyrolyzed at 773 K. The structure and single gas permeation properties of PI-based carbon membranes incorporated with or without MWCNTs were investigated. From the FE-SEM images, the pure carbon membranes have a thin dense permselective layer with few closed pores while the permselective layer of the MWCNTs/carbon nanocomposite thin films are porous due to the structure of nanotubes. The MWCNTs/carbon nanocomposite thin films exhibited that the ideal carbon dioxide flux was 866.6 Barrer (1 Barrer = 1×10−10 cm3 (STP) cm cm−2 s−1 cm Hg−1) and the separation factor of CO2/N2 was 4.1 at room temperature and 1 atm, which was 2-4 times of magnitude higher than that of pure carbon membrane prepared by the same procedures and conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 240, Issues 1–3, 15 May 2009, Pages 40-45
نویسندگان
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