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Efficient CO 2 Removal for Ultra ‐ Pure CO Production by Two Hybrid Ultramicroporous Materials
Author(s) -
Chen KaiJie,
Yang QingYuan,
Sen Susan,
Madden David G.,
Kumar Amrit,
Pham Tony,
Forrest Katherine A.,
Hosono Nobuhiko,
Space Brian,
Kitagawa Susumu,
Zaworotko Michael J.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201706090
Subject(s) - sorption , physisorption , selectivity , chemistry , chemical engineering , porosity , materials science , adsorption , catalysis , organic chemistry , engineering
Abstract Removal of CO 2 from CO gas mixtures is a necessary but challenging step during production of ultra‐pure CO as processed from either steam reforming of hydrocarbons or CO 2 reduction. Herein, two hybrid ultramicroporous materials (HUMs), SIFSIX‐3‐Ni and TIFSIX‐2‐Cu‐i , which are known to exhibit strong affinity for CO 2 , were examined with respect to their performance for this separation. The single‐gas CO sorption isotherms of these HUMs were measured for the first time and are indicative of weak affinity for CO and benchmark CO 2 /CO selectivity (>4000 for SIFSIX‐3‐Ni ). This prompted us to conduct dynamic breakthrough experiments and compare performance with other porous materials. Ultra‐pure CO (99.99 %) was thereby obtained from CO gas mixtures containing both trace (1 %) and bulk (50 %) levels of CO 2 in a one‐step physisorption‐based separation process.