کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7019903 | 1455944 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly CO2 perm-selective metal-organic framework membranes through CO2 annealing post-treatment
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
Gas separation by metal-organic framework (MOF) membranes are still unsatisfactory due partly to unsatisfied separation characteristics caused by the trade-off between selectivity and permeability. Herein, we provide a facile post CO2 annealing method to remarkably improve both the permeance and separation factor of IRMOF-1 membranes for CO2 separation from CO2/H2 mixture. Post-treatment of the IRMOF-1 membrane by annealing at 100â¯Â°C under a high pressure CO2 stream deceases H2 permeance while increasing CO2 permeance, leading to simultaneous enhancement in both CO2/H2 separation factor from 721 up to 5781 and CO2 permeance from 5.67â¯Ãâ¯10â7 up to 9.38â¯Ãâ¯10â7 molâ¯mâ2 sâ1 Paâ1 at CO2 molar fraction of 98%, feed pressure of 5â¯atm and 298â¯K. The unusual separation behavior is related to the enhanced CO2 adsorption selectivity over H2 and reduced CO2 affinity of the membrane due to the formation of surface carbonate anions caused by the CO2 treatment. The proposed gas atmosphere post-treatment strategy opens a window for designing next generation MOF-related gas separation membranes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 555, 1 June 2018, Pages 97-104
Journal: Journal of Membrane Science - Volume 555, 1 June 2018, Pages 97-104
نویسندگان
Zebao Rui, Joshua B. James, Y.S. Lin,