Title
Insights into micro-structure and separation mechanism of benzimidazole-linked polymer membrane for H2/CO2 separation
Author
Shan, Meixia (Zhengzhou University)
Zhang, Jingjing (Zhengzhou University)
Cong, Shenzhen (Tianjin University)
Zhang, Yatao (Zhengzhou University)
He, Xuezhong (Israel Institute of Technology)
Kapteijn, F. (TU Delft ChemE/Catalysis Engineering) 
Liu, X. (TU Delft ChemE/Catalysis Engineering; Tianjin University)
Date
2024
Abstract
Separation of hydrogen from carbon dioxide for sustainable H2 production and CO2 capture still faces great challenges due to the smaller size of H2 and higher condensability of CO2. Herein, a high-performance benzimidazole-linked polymer (BILP) membrane for hydrogen separation was directly prepared on α-Al2O3 substrate through a facile interfacial polymerization approach at room temperature. The separation performance of the BILP membrane were regulated by controlling the reaction time and the microstructure was systematically characterized. Molecular simulations were performed to deep understand the separation mechanism in the BILP membrane. The best performance membrane displays an extraordinary mixed gas selectivity of 40 for H2/CO2 together with outstanding H2 permeance of 250 gas permeation units (GPU) at 473 K, far exceeding the Robeson's upper bound. Besides, the membrane can withstand high temperature and pressure, and also shows good H2/N2 and H2/CH4 selectivity. The excellent separation performance, coupled with high temperature and pressure resistance and easy preparation, render BILP membranes great potential for economic H2 purification, H2 recovery, and natural gas treatment.
Subject
Benzimidazole-linked polymer
H/CO separation
Interfacial polymerization
To reference this document use:
http://resolver.tudelft.nl/uuid:1064e96b-3a4d-4dda-aa39-9a6705d246c4
DOI
https://doi.org/10.1016/j.seppur.2024.127732
Embargo date
2025-06-03
ISSN
1383-5866
Source
Separation and Purification Technology, 349
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Meixia Shan, Jingjing Zhang, Shenzhen Cong, Yatao Zhang, Xuezhong He, F. Kapteijn, X. Liu