Synthesis of Porous, Nitrogen‐Doped Adsorption/Diffusion Carbonaceous Membranes for Efficient CO2 Separation. Issue 5 (28th February 2013)

• Record Type: Journal Article
• Authors: Zhu, Xiang; Chai, Songhai; Tian, Chengcheng; Fulvio, Pasquale F.; Han, Kee Sung; Hagaman, Edward W.; Veith, Gabriel M.; Mahurin, Shannon M.; Brown, Suree; Liu, Honglai; Dai, Sheng
• Is Part Of: Macromolecular rapid communications. Volume 34:Issue 5(2013:Mar.)
• Page Start: 452
• Page End: 459
• Publication Date: 2013-02-28
• Subjects: Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201200793
• Languages: English
• ISSNs: 1022-1336

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A porous, nitrogen‐doped carbonaceous free‐standing membrane (TFMT‐550) is prepared by a facile template‐free method using letrozole as an intermediate to a triazole‐functionalized‐triazine framework, followed by carbonization. Such adsorption/diffusion membranes exhibit good separation performance of CO₂ over N₂ and surpassing the most recent Robeson upper bound. An exceptional ideal CO₂/N₂ permselectivity of 47.5 was achieved with a good CO₂ permeability of 2.40 × 10⁻¹³ mol m m⁻² s⁻¹ Pa⁻¹. The latter results arise from the presence of micropores, narrow distribution of small mesopores and from the strong dipole–quadrupole interactions between the large quadrupole moment of CO₂ molecules and the polar sites associated with N groups (e.g., triazine units) within the framework.</p> </abstract>