Carbon molecular sieve gas separation materials and membranes: A comprehensive review

Genduso, Giuseppe; Ogieglo, Wojciech; Wang, Yingge; Pinnau, Ingo

doi:10.1016/j.memsci.2024.122533

Cited by 12 publications

(1 citation statement)

References 414 publications

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“…Nanoporous carbons with highly developed micropores and mesopores have been extensively explored for energy storage applications, adsorbents, and membranes for gas separations 2 , 5 , 13 and liquid separations 14 . Unlike MOFs with uniform pore or channel sizes, carbon molecular sieving (CMS) membranes can be facilely synthesized by pyrolysis of polymer precursors, and they comprise multi-modal pores including ultramicropores (<7 Å) or bottlenecks precisely sieving penetrant molecules and microcavities (7–20 Å) promoting molecular permeation 15 – 17 . As such, tailoring CMS porous structures presents a great potential to simultaneously improve H 2 permeability and H 2 /gas selectivity, overcoming the permeability/selectivity trade-off that confines most conventional gas separation membranes 4 .…”

Section: Introductionmentioning

confidence: 99%

Hierarchically porous and single Zn atom-embedded carbon molecular sieves for H2 separations

Hu,

Lee,

Roy

et al. 2024

Nat Commun

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Hierarchically porous materials containing sub-nm ultramicropores with molecular sieving abilities and microcavities with high gas diffusivity may realize energy-efficient membranes for gas separations. However, rationally designing and constructing such pores into large-area membranes enabling efficient H2 separations remains challenging. Here, we report the synthesis and utilization of hybrid carbon molecular sieve membranes with well-controlled nano- and micro-pores and single zinc atoms and clusters well-dispersed inside the nanopores via the carbonization of supramolecular mixed matrix materials containing amorphous and crystalline zeolitic imidazolate frameworks. Carbonization temperature is used to fine-tune pore sizes, achieving ultrahigh selectivity for H2/CO2 (130), H2/CH4 (2900), H2/N2 (880), and H2/C2H6 (7900) with stability against water vapor and physical aging during a continuous 120-h test.

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