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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Multiwalled carbon nanotube mixed matrix membranes containing amines for high pressure CO2/H2 separation
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 = 7.5×10−11 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
نویسندگان
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