Realizing the Impact of the Intermediate Layer Structure on the CO2/CH4 Separation Performance of Carbon Molecular Sieving Membranes: Insights from Experimental Synthesis and Molecular Simulation.

0541781 - ÚCHP 2022 RIV GB eng J - Journal Article
Setničková, Kateřina - Huang, T.-C. - Wang, Ch.-T. - Lin, Y.-Ch. - Lee, S.H. - Zhuang, G.-L. - Tung, K.-L. - Tseng, H.-H. - Uchytil, Petr
Realizing the Impact of the Intermediate Layer Structure on the CO2/CH4 Separation Performance of Carbon Molecular Sieving Membranes: Insights from Experimental Synthesis and Molecular Simulation.
Separation and Purification Technology. Roč. 269, 15 AUG (2021), č. článku 118627. ISSN 1383-5866. E-ISSN 1873-3794
R&D Projects: GA ČR(CZ) GC19-23760J
Grant - others:MOST(TW) 180-2923-E-040-001-MY3
Institutional support: RVO:67985858
Keywords : gas separation * carbon membrane * molecular sieve
OECD category: Chemical process engineering
Impact factor: 9.136, year: 2021
Method of publishing: Limited access

This work is a continuation of our previous study investigating the role of the intermediate layer in carbon molecular sieve membrane (CMSM) formation and its impact on the gas separation performance. Herein, the effect of key preparation variables of CMS/TiO2 membrane prepared from the polyetherimide (PEI) precursor on the membrane’s structure and CO2/CH4 separation quality was studied. A set of CMS/TiO2/Al2O3 membranes produced under different conditions (pH of the sol-gel for the intermediate TiO2 layer preparation, the TiO2 interlayer thickness and the carbon separation layer thickness) was prepared, characterized by the AFM, FE-SEM and EDXS methods and tested for CO2/CH4 separation efficiency. In addition, a molecular simulation was applied to investigate the effect of intermediate TiO2 layer. All prepared membranes had good separation quality (the separation factor between 37 and 65). The best results for membranes with the thickest TiO2 interlayer prepared at pH = 5 were identified, notably, membrane samples with the thin defect free carbon separation layer achieved the best balance of permeance vs. selectivity and exceeded the Robeson upper bound. The molecular simulation results support the finding of the intermediate layer plays a vital role for the synthesis of gas separation membranes.
Permanent Link: http://hdl.handle.net/11104/0319551