کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7022228 | 1456040 | 2014 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multiwalled carbon nanotube mixed matrix membranes containing amines for high pressure CO2/H2 separation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
CO2-selective mixed matrix membranes capable of facilitated transport were synthesized for CO2/H2 separation at high pressures of at least 1.52 MPa and high temperatures above 373.15 K. A significant improvement in membrane stability was achieved by thoroughly dispersing multiwalled carbon nanotubes (MWNTs) as mechanical reinforcing fillers in a polyvinylalcohol matrix containing amines. With 2 wt% MWNTs incorporated, the membrane performance, including a CO2/H2 selectivity of 43 and a CO2 permeability of 836 Barrers (1 Barrer = 7.5Ã10â11 cm3(STP) cm/(cm2 s kPa)), showed no change for 444 h (18.5 days) when operated at 1.52 MPa and 380.15 K. At the same conditions, the membrane containing 4 wt% acid-treated MWNTs also showed good stability. The membranes synthesized in this work are the first of this kind, displaying exceptional CO2/H2 separation performance and high tolerance to feed gas at high pressures and high temperatures. Potentially, they could be used in a stand-alone membrane unit for energy-efficient precombustion carbon capture from coal-derived syngas or in conjunction with water-gas-shift reaction for CO clean-up to produce high-purity H2 for fuel cells and to simultaneously capture CO2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 459, 1 June 2014, Pages 233-243
Journal: Journal of Membrane Science - Volume 459, 1 June 2014, Pages 233-243
نویسندگان
Yanan Zhao, Benson T. Jung, Luca Ansaloni, W.S. Winston Ho,