Carbon molecular-sieve membranes developed from a Tröger’s base polymer and possessing superior gas-separation performance

Dai, Zhongde; Guo, Hongfang; Deng, Jing; Deng, Liyuan; Yan, Jiaqi; Spontak, Richard J.

doi:10.1016/j.memsci.2023.121731

Cited by 14 publications

(6 citation statements)

References 61 publications

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“…The XRD diffractograms of neat TB and MMMs are shown in Figure . The TB matrix has two broad peaks at ∼13.6 and ∼23.8°, respectively, which is consistent with the expected amorphous state of TB polymer . The characteristic diffraction peaks of zeolites are presented for MMM samples after the introduction of zeolites.…”

Section: Resultssupporting

confidence: 74%

“…Tröger’s base (TB) polymer was synthesized according to the procedure described in the literature, as shown in Scheme . − The detailed steps were as follows:…”

Section: Methodsmentioning

confidence: 99%

“…The TB matrix has two broad peaks at ∼13.6 and ∼23.8°, respectively, which is consistent with the expected amorphous state of TB polymer. 52 The characteristic diffraction peaks of zeolites are presented for MMM samples after the introduction of zeolites. And the intensities of these typical diffraction peaks in MMMs gradually increases with the added amounts of zeolites, which indicates that the crystal structures of zeolite is preserved.…”

Section: Characterizationmentioning

confidence: 99%

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Mixed Matrix Membranes Based on MFI Zeolite Nanosheets with Tunable Thickness for CO₂/CH₄ and H₂/CH₄ Separation

Feng,

Ma,

Liu

et al. 2024

Ind. Eng. Chem. Res.

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Mixed matrix membranes (MMMs) combine the advantages of polymers and nanofillers. In this work, MFI zeolite nanosheets with different thicknesses (i.e., 40, 80, and 200 nm) were synthesized hydrothermally. MMMs were fabricated by incorporating MFI zeolite nanosheets into Troger's base polymer (TB). Gas separation performance of the obtained MMMs was systematically investigated under different operation conditions (e.g., feed pressure and test temperature). Meanwhile, MMMs were also characterized using various techniques including SEM, FTIR, TGA, and XRD. Even though the presence of all three different MFI zeolite nanosheets significantly improved the gas permeability. It was found out the MMMs with MFI nanosheets in the lowest thickness (i.e., 40 nm) showed the highest improvement in both CO 2 and H 2 permeability (7.2 and 4.9 times, respectively), denoting developing zeolite nanosheet materials with small thickness could be a promising strategy to promote gas separation performances of MMMs.

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Section: Resultssupporting

confidence: 74%

“…Tröger’s base (TB) polymer was synthesized according to the procedure described in the literature, as shown in Scheme . − The detailed steps were as follows:…”

Section: Methodsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

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Mixed Matrix Membranes Based on MFI Zeolite Nanosheets with Tunable Thickness for CO₂/CH₄ and H₂/CH₄ Separation

Feng,

Ma,

Liu

et al. 2024

Ind. Eng. Chem. Res.

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“…Tröger’s base (TB) polymer was synthesized according to the procedures presented in the literature, − as shown in Scheme . The TB polymer solution with a concentration of 5 wt % was obtained by adding a certain amount of TB polymer into NMP, followed by stirring for at least 2 h at room temperature (RT).…”

Section: Methodsmentioning

confidence: 99%

Thin-Film-Composite Carbon Molecular Sieve Membranes for Efficient Helium and Hydrogen Separation

Feng,

Guo,

Deng

et al. 2023

Ind. Eng. Chem. Res.

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Carbon molecular sieve (CMS) membranes have been proven to be effective gas separation membranes, especially for light gas separation. In the current work, Troger's base polymer (TB)/poly(styrene sulfonic acid) (PSS) thin-film-composite (TFC) carbon molecular sieve (CMS) membranes were prepared by dip-coating and subsequent carbonization. Porous anodic aluminum oxide (AAO) plates were employed as the support layer, and carboxylated nanocellulose fiber (CNF) was used as the sacrificed layer. The effects of membrane preparation conditions, including solution concentration and carbonization temperature, and operating conditions, such as feed pressure and test temperature, on the hydrogen (H 2 ) and helium (He) separation performance were systematically investigated. Meanwhile, the relationship between gas separation performances and the microstructure of TFC CMS membranes was explored by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectrum. With a carbonization temperature of 550 °C, the H 2 /CH 4 (149.25), H 2 /N 2 (131.04), He/CH 4 (137.07), and He/N 2 (120.35) selectivity of the TB/PSS membrane prepared at a solution concentration of 10 wt % was significantly higher than other TFC CMS membranes, and the H 2 and He permeances were 1359.73 GPU and 1248.49 GPU under a feed pressure of 2 bar, respectively. The excellent gas separation performance of this membrane demonstrates its great potential for H 2 and He purification applications.

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“…In various gas separation applications, a number of membrane materials have been exploited, such as polymer membranes, 25–27 metal–organic framework (MOF) membranes, 28,29 zeolite membranes, 22,30,31 mixed matrix membranes (MMMs), 32–34 CMS membranes, 35–38 and so on. Among them, polymer membranes have been widely used due to their low cost, reasonable mechanical strength and good processability.…”

Section: Introductionmentioning

confidence: 99%

Next-generation carbon molecule sieve membranes derived from polyimides and polymers of intrinsic microporosity for key energy intensive gas separations and carbon capture

Deng,

Wei,

et al. 2024

J. Mater. Chem. A

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Carbon molecular-sieve membranes developed from a Tröger’s base polymer and possessing superior gas-separation performance

Cited by 14 publications

References 61 publications

Mixed Matrix Membranes Based on MFI Zeolite Nanosheets with Tunable Thickness for CO₂/CH₄ and H₂/CH₄ Separation

Mixed Matrix Membranes Based on MFI Zeolite Nanosheets with Tunable Thickness for CO₂/CH₄ and H₂/CH₄ Separation

Thin-Film-Composite Carbon Molecular Sieve Membranes for Efficient Helium and Hydrogen Separation

Next-generation carbon molecule sieve membranes derived from polyimides and polymers of intrinsic microporosity for key energy intensive gas separations and carbon capture

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Carbon molecular-sieve membranes developed from a Tröger’s base polymer and possessing superior gas-separation performance

Cited by 14 publications

References 61 publications

Mixed Matrix Membranes Based on MFI Zeolite Nanosheets with Tunable Thickness for CO2/CH4 and H2/CH4 Separation

Mixed Matrix Membranes Based on MFI Zeolite Nanosheets with Tunable Thickness for CO2/CH4 and H2/CH4 Separation

Thin-Film-Composite Carbon Molecular Sieve Membranes for Efficient Helium and Hydrogen Separation

Next-generation carbon molecule sieve membranes derived from polyimides and polymers of intrinsic microporosity for key energy intensive gas separations and carbon capture

Contact Info

Product

Resources

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Mixed Matrix Membranes Based on MFI Zeolite Nanosheets with Tunable Thickness for CO₂/CH₄ and H₂/CH₄ Separation

Mixed Matrix Membranes Based on MFI Zeolite Nanosheets with Tunable Thickness for CO₂/CH₄ and H₂/CH₄ Separation