A facile approach to synthesize SSZ-13 membranes with ultrahigh N2 permeances for efficient N2/CH4 separations

Li, Yanmei; He, Shengnan; Shu, Chaojiu; Li, Xinping; Liu, Bo; Zhou, Rongfei; Lai, Zhiping

doi:10.1016/j.memsci.2021.119349

Cited by 26 publications

(4 citation statements)

References 43 publications

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“…CHA-type (SSZ-13 and SAPO = 34) and AEI-type (AlPO-18) demonstrated an N 2 /CH 4 selectivity around 10 with good N 2 permeance, which is well above the 2008 Robeson upper bound for polymer membranes. The best separation performance was from an SSZ-13 zeolite membrane reported by Li et al [134]. The membrane had an N 2 permeance of 8.5 × 10 −7 mol•m −2 •Pa −1 •s −1 and an N 2 /CH 4 separation of 13.5 at 298 K and 0.303 MPa feed pressure.…”

Section: N 2 /Chmentioning

confidence: 92%

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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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Section: N 2 /Chmentioning

confidence: 92%

“…Figure 5. N 2 /CH 4 separation performance for different types of small-pore zeolite membranes [15,62,63,65,73,104,[134][135][136][137][138][139][140][141]. * denotes results from pure gas permeation tests.…”

Section: N 2 /Chmentioning

confidence: 99%

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

2022

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“…High-silica and all-silica zeolite membranes own hydrophobic surfaces and exhibit good moisture resistance . Currently, only a small amount of all-silica and high-silica zeolite membrane materials, such as DDR-type , and CHA-type, − are expected to meet the application requirements of CO 2 separation from flue and natural gases in humid conditions. DDR-type zeolite membranes exhibit exceptional separation selectivity but relatively low CO 2 permeances .…”

Section: Introductionmentioning

confidence: 99%

Sustainable Gel-Less Synthesis of Sub-1-μm-Thick All-Silica CHA Zeolite Membranes for Efficient CO₂ Capture

Wang,

Yan,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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Carbon capture and storage are extensively recognized as promising technologies for relieving climate change. All-silica CHA (Si-CHA) zeolite membranes have an extremely attractive CO 2 separation performance and high resistance to humidity and CO 2 partial pressures. However, it remains an environmental issue for synthesizing Si-CHA zeolite and zeolite membranes by the conventional route because a large amount of gel containing toxic fluorite is used. Herein, we have reported a sustainable gel-less synthesis approach to fabricate uniform and sub-1-micron Si-CHA zeolite membranes. The sustainability and economy of membrane synthesis by the current approach can be improved since the amount of gel is saved by up to 95% and no fluoride is used compared with the conventional approach. Moreover, a formation mechanism of Si-CHA zeolite membranes is proposed. The effects of synthesis temperature, time, seeding layer, and gel composition on membrane formation are investigated. Thin Si-CHA membrane prepared under optimized conditions shows a notable CO 2 permeance of 1.3 × 10 −6 mol/(m 2 s Pa) and a CO 2 /N 2 selectivity of 31 in an equimolar CO 2 /N 2 mixture. Such a separation performance of the current membrane surpasses that of the reported membranes. The membrane also displays excellent separation performance in CO 2 /CH 4 mixtures. The environmentally friendly gel-less synthesis approach is promising to produce Si-CHA zeolite membranes on a large scale for practical applications of the CO 2 capture from flue gas, natural gas, and biogas.

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“…AEI-type (AIPO-18) and CHA-type (SAPO-34 together with SSZ-13) zeolite membranes show good nitrogen permeances, which are located over the top bound of the Robeson 2008 plot (for polymeric membranes) [14]. Li et al [11] reported the SSZ-13 membrane's successful functioning (N 2 permeance of 8.9 ×10 − 7 mol.m − 2 .s − 1 .Pa − 1 and N 2 /CH 4 permselectivity of 13.8 at 298 K and the feed pressure of 0.303 MPa). Substantial separation performances were also acquired by SAPO-34 membranes [15].…”

Section: Introductionmentioning

confidence: 99%

New Approach for Activation of N2-Selective ETS-4 Membrane for Nitrogen Separation from N2/CH4 Mixture

Zakeri,

Vosoughi,

Maghsoudi

et al. 2024

Korean J. Chem. Eng.

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Microporous ETS-4 zeotype, with its 4Å pore openings, is an adequate material for the kinetic separation of nitrogen from methane. Small-sized ETS-4 was synthesized by a novel method and then utilized as membrane seeding powder. High-quality and uniform ETS-4 membranes were fabrucated utilizing a new recipe and the secondary growth approach on α-alumina supports. XRD, FESEM, and EDX studies were used to analyse the synthesized ETS-4 powder and membranes. The effect of membrane activation temperature (80-140 ºC) on permeance was evaluated. In addition to N 2 and CH 4 , the membrane permeance was also evaluated for O 2 and Ar gases. N 2 permeance increased gradually as the activation temperature was raised in the 80-120 ºC range, reaching its highest value (i.e., 2.6×10 − 8 mol m − 2 s − 1 Pa − 1 ) after activation at 140 ºC. The permeances of pure N 2 and CH 4 gases were quanti ed through the ETS-4 membrane at 30, 50, and 70 ºC, and a pressure difference up to 600 kPa. N 2 /CH 4 permselectivity of 75.19 ( N 2 permeance of 1.94 × 10 − 8 mol m-2 s − 1 Pa − 1 ) were measured at 30°C and 200 kPa of feed pressure, respectively, which is the highest N 2 /CH 4 permselectivity among all membranes reported in the literature.

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A facile approach to synthesize SSZ-13 membranes with ultrahigh N2 permeances for efficient N2/CH4 separations

Cited by 26 publications

References 43 publications

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

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

Sustainable Gel-Less Synthesis of Sub-1-μm-Thick All-Silica CHA Zeolite Membranes for Efficient CO₂ Capture

New Approach for Activation of N2-Selective ETS-4 Membrane for Nitrogen Separation from N2/CH4 Mixture

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A facile approach to synthesize SSZ-13 membranes with ultrahigh N2 permeances for efficient N2/CH4 separations

Cited by 26 publications

References 43 publications

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

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

Sustainable Gel-Less Synthesis of Sub-1-μm-Thick All-Silica CHA Zeolite Membranes for Efficient CO2 Capture

New Approach for Activation of N2-Selective ETS-4 Membrane for Nitrogen Separation from N2/CH4 Mixture

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Sustainable Gel-Less Synthesis of Sub-1-μm-Thick All-Silica CHA Zeolite Membranes for Efficient CO₂ Capture