Synthesis of porous, nitrogen-doped adsorption/diffusion carbonaceous membranes for efficient CO2 separation

Xiang Zhu, Songhai Chai, Chengcheng Tian, Pasquale F. Fulvio, Kee Sung Han, Edward W. Hagaman, Gabriel M. Veith, Shannon M. Mahurin, Suree Brown, Honglai Liu, Sheng Dai

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

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 CO 2 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.

Original languageEnglish
Pages (from-to)452-459
Number of pages8
JournalMacromolecular Rapid Communications
Volume34
Issue number5
DOIs
StatePublished - Mar 12 2013

Keywords

  • N-doped
  • adsorption/diffusion
  • carbonaceous membrane

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