Efficient scale-up synthesis and hydrogen separation of hollow fiber DD3R zeolite membranes

Du, Peng; Song, Jun Young; Wang, Xuerui; Zhang, Yuting; Xie, Jixian; Liu, Gang; Liu, Yongli; Wang, Zhenwei; Zhou, Hong; Gu, Xuehong

doi:10.1016/j.memsci.2021.119546

Cited by 31 publications

(8 citation statements)

References 41 publications

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“…The α-Al 2 O 3 supports, which had average pore size of ∼0.2 μm and porosity of ∼40%, were provided by Nanjing Membrane Materials Industrial Technology Research Institute Co., Ltd. The detailed preparation could be found in our previous reports. , The membrane morphology was observed via FESEM (S4800, Hitachi, Japan), and powder X-ray diffraction (PXRD) patterns were obtained using a Rigaku MiniFlex 600 with Cu K α radiation in the 2θ range of 5–50°.…”

Section: Methodsmentioning

confidence: 99%

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Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Song

Peng

You

et al. 2022

Ind. Eng. Chem. Res.

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Membrane technology has emerged to be a promising alternative for natural gas upgrading. Zeolite membranes are attracting more and more attention because of the hydrothermal and chemical stability. However, the zeolite membranes are generally evaluated in the unary or binary CO2/CH4 components, which is far from the real applications. Herein we investigated the CO2 permeation through DD3R zeolite membranes under the presence of light gas components (e.g., N2, CH4, C2H6, and SF6). The CO2 diffusivity was calculated by the generalized Maxwell-Stefan model for more insights on CO2 transport. The diffusion of CO2 molecules was slightly affected by the presence of N2, CH4, and SF6. However, the CO2 diffusivity in equimolar CO2/C2H6 was one magnitude lower than that of pure CO2 component because of the strong competitive adsorption and slow diffusion of C2H6 molecules. An empirical formula was proposed to predict the CO2 diffusivity in the CO2/CH4/C2H6 ternary mixture. The predicted CO2 flux matched well with the experimental one for the mixture containing less than 15 mol % C2H6. This would provide a facile method to determine the required membrane area for multicomponent mixture separation.

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Section: Methodsmentioning

confidence: 99%

“…Zhou et al claimed the H 2 permeance of SSZ-13 zeolite membrane decreased by 62.6% with even 5 mol % C 2 H 6 contained in the equimolar H 2 /CH 4 mixture. However, 77% H 2 permeance was reserved for DD3R zeolite membranes under the same situation, benefiting from the smaller pore window and stronger size-exclusion effect …”

Section: Introductionmentioning

confidence: 99%

Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Song

Peng

You

et al. 2022

Ind. Eng. Chem. Res.

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“…With recent developments in polymer membranes, it is challenging for those studied small-pore zeolite membranes to be economically advantageous in comparison to polymer membranes. [15,43,56,58,79,81,96,116,120,122,123,[129][130][131][132]. * denotes results from pure gas permeation tests.…”

Section: H 2 Separation From Hydrocarbonsmentioning

confidence: 99%

“…At a feed pressure of 8.0 MPag and 318 K, the membrane still demonstrated a CO 2 /CH 4 selectivity exceeding 100 for feed gas composed of 70 mol% CO 2 , which demonstrated great feasibility for high operating pressure in industrial applications. The Gu group of Nanjing Tech University also tried to scale up DDR membrane fabrication on hollow-fiber support [96]. The four-channel α-Al 2 O 3 hollowfiber supports have 3.8 mm O.D., 0.9 mm I.D., ~50% porosity and an average pore size of 200 nm.…”

Section: Ddrmentioning

confidence: 99%

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Small-Pore Zeolite Membranes: A Review of Gas Separation Applications and Membrane Preparation

2022

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There have been significant advancements in small-pore zeolite membranes in recent years. With pore size closely related to many energy- or environment-related gas molecules, small-pore zeolite membranes have demonstrated great potential for the separation of some interested gas pairs, such as CO2/CH4, CO2/N2 and N2/CH4. Small-pore zeolite membranes share some characteristics but also have distinctive differences depending on their framework, structure and zeolite chemistry. Through this mini review, the separation performance of different types of zeolite membranes with respect to interested gas pairs will be compared. We aim to give readers an idea of membrane separation status. A few representative synthesis conditions are arbitrarily chosen and summarized, along with the corresponding separation performance. This review can be used as a quick reference with respect to the influence of synthesis conditions on membrane quality. At the end, some general findings and perspectives will be discussed.

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Zeolite Membrane‐Based Low‐Temperature Dehydrogenation of a Liquid Organic Hydrogen Carrier: A Key Step in the Development of a Hydrogen Economy

Kim,

Lee,

Sung

et al. 2024

Advanced Science

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Methylcyclohexane (MCH) dehydrogenation is an equilibrium‐limited reaction that requires high temperatures (>300 °C) for complete conversion. However, high‐temperature operation can degrade catalytic activity and produce unwanted side products. Thus, a hybrid zeolite membrane (Z) is prepared on the inner surface of a tubular support and used it as a wall in a membrane reactor (MR) configuration. Pt/C catalysts is packed diluted with quartz sand inside the Z‐coated tube and applied the MR for MCH dehydrogenation at low temperatures (190–250 °C). Z showed a remarkable H2‐permselectivity in the presence of both toluene and MCH, yielding separation factors over 350. The Z‐based MR achieved higher MCH conversion (75.3% ± 0.8% at 220 °C) than the conventional packed‐bed reactor (56.4% ± 0.3%) and the equilibrium state (53.2%), owing to the selective removal of H2 through Z. In summary, the hybrid zeolite MR enhances MCH dehydrogenation at low temperatures by overcoming thermodynamic limitations and improves the catalytic performance and product selectivity of the reaction.

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Efficient scale-up synthesis and hydrogen separation of hollow fiber DD3R zeolite membranes

Cited by 31 publications

References 41 publications

Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Small-Pore Zeolite Membranes: A Review of Gas Separation Applications and Membrane Preparation

Zeolite Membrane‐Based Low‐Temperature Dehydrogenation of a Liquid Organic Hydrogen Carrier: A Key Step in the Development of a Hydrogen Economy

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Efficient scale-up synthesis and hydrogen separation of hollow fiber DD3R zeolite membranes

Cited by 31 publications

References 41 publications

Effect of Light Gas Components on CO2 Permeation through DD3R Membranes

Effect of Light Gas Components on CO2 Permeation through DD3R Membranes

Small-Pore Zeolite Membranes: A Review of Gas Separation Applications and Membrane Preparation

Zeolite Membrane‐Based Low‐Temperature Dehydrogenation of a Liquid Organic Hydrogen Carrier: A Key Step in the Development of a Hydrogen Economy

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Product

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Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes

Effect of Light Gas Components on CO₂ Permeation through DD3R Membranes