High CO2‐Capture Ability of a Porous Organic Polymer Bifunctionalized with Carboxy and Triazole Groups. Issue 35 (23rd July 2013)

• Record Type: Journal Article
• Authors: Xie, Lin‐Hua; Suh, Myunghyun Paik
• Is Part Of: Chemistry. Volume 19:Issue 35(2013)
• Page Start: 11590
• Page End: 11597
• Publication Date: 2013-07-23
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201301822
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new porous organic polymer, <bold>SNU‐C1</bold>, incorporating two different CO<sub>2</sub>‐attracting groups, namely, carboxy and triazole groups, has been synthesized. By activating <bold>SNU‐C1</bold> with two different methods, vacuum drying and supercritical‐CO<sub>2</sub> treatment, the guest‐free phases, <bold>SNU‐C1‐va</bold> and <bold>SNU‐C1‐sca</bold>, respectively, were obtained. Brunauer–Emmett–Teller (BET) surface areas of <bold>SNU‐C1‐va</bold> and <bold>SNU‐C1‐sca</bold> are 595 and 830 m<sup>2</sup>g<sup>−1</sup>, respectively, as estimated by the N<sub>2</sub>‐adsorption isotherms at 77 K. At 298 K and 1 atm, <bold>SNU‐C1‐va</bold> and <bold>SNU‐C1‐sca</bold> show high CO<sub>2</sub> uptakes, 2.31 mmol g<sup>−1</sup> and 3.14 mmol g<sup>−1</sup>, respectively, the high level being due to the presence of abundant polar groups (carboxy and triazole) exposed on the pore surfaces. Five separation parameters for flue gas and landfill gas in vacuum‐swing adsorption were calculated from single‐component gas‐sorption isotherms by using the ideal adsorbed solution theory (IAST). The data reveal excellent CO<sub>2</sub>‐separation abilities of <bold>SNU‐C1‐va</bold> and <bold>SNU‐C1‐sca</bold>, namely high CO<sub>2</sub>‐uptake capacity, high selectivity, and high regenerability. The gas‐cycling experiments for the materials and the water‐treated samples, experiments that involved treating the samples with a CO<sub>2</sub>‐N<sub>2</sub> gas mixture (15:85, <italic>v</italic>/<italic>v</italic>) followed by a pure N<sub>2</sub> purge, further verified the high regenerability and water stability. The results suggest that these materials have great potential applications in CO<sub>2</sub> separation.</p> </abstract>