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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
general
Porous materials with optimal adsorption thermodynamics and kinetics for co
2
separation
Nature, Volume 495, No. 7439, Year 2013
Notification
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Description
The energy costs associated with the separation and purification of industrial commodities, such as gases, fine chemicals and fresh water, currently represent around 15 per cent of global energy production, and the demand for such commodities is projected to triple by 2050 (ref. 1). The challenge of developing effective separation and purification technologies that have much smaller energy footprints is greater for carbon dioxide (CO2) than for other gases; in addition to its involvement in climate change, CO2 is an impurity in natural gas, biogas (natural gas produced from biomass), syngas (CO/H2, the main source of hydrogen in refineries) and many other gas streams. In the context of porous crystalline materials that can exploit both equilibrium and kinetic selectivity, size selectivity and targeted molecular recognition are attractive characteristics for CO2 separation and capture, as exemplified by zeolites 5A and 13X (ref. 2), as well as metal-organic materials (MOMs). Here we report that a crystal engineering or reticular chemistry strategy that controls pore functionality and size in a series of MOMs with coordinately saturated metal centres and periodically arrayed hexafluorosilicate (SiF62−) anions enables a ‘sweet spot’ of kinetics and thermodynamics that offers high volumetric uptake at low Co2 partial pressure (less than 0.15 bar). Most importantly, such MOMs offer an unprecedented CO2 sorption selectivity over N2, H2 and CH4, even in the presence of moisture. These MOMs are therefore relevant to CO2 separation in the context of post-combustion (flue gas, CO2/N2), pre-combustion (shifted synthesis gas stream, CO2/H2) and natural gas upgrading (natural gas clean-up, CO2/CH4). © 2013 Macmillan Publishers Limited. All rights reserved.
Authors & Co-Authors
Nugent, Patrick
United States, Tampa
University of South Florida, Tampa
Giannopoulou, Eugenia G.
Saudi Arabia, Thuwal
King Abdullah University of Science and Technology
Burd, Stephen D.
United States, Tampa
University of South Florida, Tampa
Elemento, Olivier
Saudi Arabia, Thuwal
King Abdullah University of Science and Technology
Forrest, Katherine A.
United States, Tampa
University of South Florida, Tampa
Pham, Tony
United States, Tampa
University of South Florida, Tampa
Ma, Shengqian
United States, Tampa
University of South Florida, Tampa
Space, Brian
United States, Tampa
University of South Florida, Tampa
Wojtas, Łukasz
United States, Tampa
University of South Florida, Tampa
Eddaoudi, M.
United States, Tampa
University of South Florida, Tampa
Saudi Arabia, Thuwal
King Abdullah University of Science and Technology
Zaworotko, Michael J.
United States, Tampa
University of South Florida, Tampa
Statistics
Citations: 1,827
Authors: 11
Affiliations: 2
Identifiers
Doi:
10.1038/nature11893
ISSN:
00280836
Research Areas
Environmental