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Sorption‐Enhanced Mixed Matrix Membranes with Facilitated Hydrogen Transport for Hydrogen Purification and CO 2 Capture
Author(s) -
Zhu Lingxiang,
Yin Deqiang,
Qin Yueling,
Konda Shailesh,
Zhang Shawn,
Zhu Aiden,
Liu Shuai,
Xu Ting,
Swihart Mark T.,
Lin Haiqing
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201904357
Subject(s) - sorption , membrane , materials science , polymer , chemical engineering , selectivity , gas separation , hydrogen , nanoparticle , thermal diffusivity , permeation , percolation threshold , nanomaterials , nanotechnology , organic chemistry , adsorption , composite material , catalysis , chemistry , thermodynamics , biochemistry , physics , electrical engineering , engineering , electrical resistivity and conductivity
Mixed matrix membranes (MMMs) comprising size‐sieving fillers dispersed in polymers exhibit diffusivity selectivity and may surpass the upper bound for gas separation, but their performance is limited by defects at the polymer/filler interface. Herein, a fundamentally different approach employing a highly sorptive filler that is inherently less sensitive to interfacial defects is reported. Palladium nanoparticles with extremely high H 2 sorption are dispersed in polybenzimidazole at loadings near the percolation threshold, which increases both H 2 permeability and H 2 /CO 2 selectivity. Performance of these MMMs surpasses the state‐of‐the‐art upper bound for H 2 /CO 2 separation with polymer‐based membranes. The success of these sorption‐enhanced MMMs for H 2 /CO 2 separation may launch a new research paradigm that taps the enormous knowledge of affinities between gases and nanomaterials to design MMMs for a wide variety of gas separations.