کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7043909 | 1456923 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pure silica CHA-type zeolite membranes for dry and humidified CO2/CH4 mixtures separation
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
Dense and thin pure silica CHA-type zeolite (Si-CHA) membranes have been synthesized on porous α-alumina supports and investigated for CO2 permeation and CO2/CH4 separation performance under dry and humidified conditions. Si-CHA membranes with ultra-high permeance were greatly affected by performance suppression due to concentration polarization under high pressure and low feed-rate conditions. Under high feed-rate conditions at 298â¯K and a feed pressure of 0.1â¯MPaG, the CO2/CH4 selectivity was 130 with a CO2 permeance of 4.0â¯Ãâ¯10-6â¯mol/(m2â¯sâ¯Pa) for an equimolar CO2/CH4 dry gas mixture. The presence of water vapor significantly reduced CO2 permeance, but the performance improved as feed pressure increased. The CO2/CH4 selectivities at high pressure with and without water vapor were essentially the same.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 197, 31 May 2018, Pages 116-121
Journal: Separation and Purification Technology - Volume 197, 31 May 2018, Pages 116-121
نویسندگان
Koji Kida, Yasushi Maeta, Katsunori Yogo,