Highly permeable and selective tubular zeolite CHA membranes

Yu, Liang; Nobandegani, Mojtaba Sinaei; Holmgren, Allan; Hedlund, Jonas

doi:10.1016/j.memsci.2019.117224

Cited by 58 publications

(30 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was important to obtain a highly permeable zeolite membrane, as discussed by Hedlund's group. 29 XRD patterns of the membranes synthesized with 2−8 days are shown in Figure 5. The peaks of the membranes were assigned to zeolite CHA and alumina supports.…”

Section: Resultsmentioning

confidence: 99%

“…It indicated that the crystallization of the zeolite layer was mostly carried out on the surface rather than in the pores of the support due to the induction of the seed layer. It was important to obtain a highly permeable zeolite membrane, as discussed by Hedlund’s group . XRD patterns of the membranes synthesized with 2–8 days are shown in Figure .…”

Section: Results and Discussionmentioning

confidence: 99%

“…Kosinov et al 25 pure silica CHA (like SSZ-13) zeolite membranes on a symmetric alumina tube, and the best membrane showed a CO 2 permeance of 4.0 × 10 −6 mol m −2 s −1 Pa −1 and a CO 2 / CH 4 selectivity of 130. Yu et al synthesized high-silica CHA zeolite membranes on the graded alumina disc 28 and tubular substrate 29 with high CO 2 permeances of (4.0−7.8) × 10 −6 mol m −2 s −1 Pa −1 and CO 2 /CH 4 selectivities of 32−99. SSZ-13 membranes were normally synthesized by conventional hydrothermal treatment in which the substrate was immersed in a large volume of mother liquid in an autoclave.…”

Section: Introductionmentioning

confidence: 99%

“…Kida et al fabricated pure silica CHA (like SSZ-13) zeolite membranes on a symmetric alumina tube, and the best membrane showed a CO 2 permeance of 4.0 × 10 –6 mol m –2 s –1 Pa –1 and a CO 2 /CH 4 selectivity of 130. Yu et al synthesized high-silica CHA zeolite membranes on the graded alumina disc and tubular substrate with high CO 2 permeances of (4.0–7.8) × 10 –6 mol m –2 s –1 Pa –1 and CO 2 /CH 4 selectivities of 32–99.…”

Section: Introductionmentioning

confidence: 99%

“…SSZ-13 membranes were normally synthesized by conventional hydrothermal treatment in which the substrate was immersed in a large volume of mother liquid in an autoclave. ,− In fact, only a trace amount of crystals on the substrate are necessary for a thin zeolite membrane. A large volume of the liquid gel should be avoided to use.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

Liu

et al. 2020

Energy Fuels

View full text Add to dashboard Cite

Thin and high-quality SSZ-13 membranes were synthesized by the steam-assisted conversion (SAC) method for the first time. More than 95% gel/solution was saved for membrane growth compared with conventional hydrothermal synthesis. Another advantage for the SAC method was that the competitive crystallization between the bulk solution and support was eliminated. The thickness of SSZ-13 membranes was well controlled from 1.2 to 3.0 μm by the dilution of sucked solution and synthesis time. Three membranes prepared under optimized conditions displayed N 2 permeances of (1.4 ± 0.12) × 10 −7 mol m −2 s −1 Pa −1 (∼418 GPU), N 2 /CH 4 selectivities of 14.8 ± 0.45 and a separation index of 0.19 ± 0.02 mol m −2 s −1 at 298 K, and 0.2 MPa pressure drop for an equimolar N 2 /CH 4 mixture. The membranes synthesis by the SAC method had a good reproducibility. Such separation performances of current SSZ-13 membranes were beyond the upper bound for N 2 /CH 4 separation among the reported membranes. The influences of temperature, pressure drop, and feed flow rate on separation performance of the membranes were investigated. High-pressure N 2 /CH 4 separation was also reported using SSZ-13 membranes at the pressure drop up to 2.5 MPa.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

Liu

et al. 2020

Energy Fuels

View full text Add to dashboard Cite

show abstract

High‐Performance Zeolitic Hollow‐Fiber Membranes by a Viscosity‐Confined Dry Gel Conversion Process for Gas Separation

Yang

Min

et al. 2022

Angewandte Chemie

View full text Add to dashboard Cite

Zeolite membranes show great potential for gas and hydrocarbon separations, but high manufacturing cost has been one of the main hurdles in their industrial application. Here we demonstrate a method termed viscosity‐confined dry gel conversion (VCDGC) for zeolite hollow fiber membrane fabrication. We demonstrate in detail the VCDGC synthesis of small‐pore CHA zeolite membranes. Extensive permeation measurements reveal that dry gel‐processed CHA zeolite hollow fiber membranes have excellent gas and hydrocarbon separation characteristics well exceeding or comparable to current membranes. Medium‐pore MFI membranes are also fabricated, and their favorable hydrocarbon separation characteristics indicate the versatility and reliability of the VCDGC method.

show abstract

Improved Synthesis of Hollow Fiber SSZ‐13 Zeolite Membranes for High‐Pressure CO₂/CH₄ Separation

Peng,

Chen,

You

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

High‐silica CHA zeolite membranes are highly desired for natural gas upgrading because of their separation performance in combination with superior mechanical and chemical stability. However, the narrow synthesis conditions range significantly constrains scale‐up preparation. Herein, we proposed a facile interzeolite conversion approach using FAU zeolite to prepare SSZ‐13 zeolite seeds, featuring a shorter induction and a longer crystallization period of the membrane synthesis. The membrane thickness was constant at ~3 μm over a wide span of synthesis time (24 ~ 96 h), while the selectivity (separation efficiency) was easily improved by extending synthesis time without compromising permeance (throughput). At 0.2 MPa feed pressure and 303 K, the membranes showed an average CO2 permeance of (5.2 ± 0.5) × 10‐7 mol·m‐2·s‐1·Pa‐1 (1530 GPU), with an average CO2/CH4 mixture selectivity of 143 ± 7. Minimal defects ensure a high selectivity of 126 with a CO2 permeation flux of 0.4 mol·m‐2·s‐1 at 6.1 MPa feed pressure, far surpassing requirements for industrial applications. The feasibility for successful scale‐up of our approach was further demonstrated by the batch synthesis of 40 cm‐long hollow fiber SSZ‐13 zeolite membranes exhibiting CO2/CH4 mixture selectivity up to 400 (0.2 MPa feed pressure and 303 K) without using sweep gas.

show abstract

Highly permeable and selective tubular zeolite CHA membranes

Cited by 58 publications

References 34 publications

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

High‐Performance Zeolitic Hollow‐Fiber Membranes by a Viscosity‐Confined Dry Gel Conversion Process for Gas Separation

Improved Synthesis of Hollow Fiber SSZ‐13 Zeolite Membranes for High‐Pressure CO₂/CH₄ Separation

Contact Info

Product

Resources

About

Highly permeable and selective tubular zeolite CHA membranes

Cited by 58 publications

References 34 publications

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N2/CH4 Separation

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N2/CH4 Separation

High‐Performance Zeolitic Hollow‐Fiber Membranes by a Viscosity‐Confined Dry Gel Conversion Process for Gas Separation

Improved Synthesis of Hollow Fiber SSZ‐13 Zeolite Membranes for High‐Pressure CO2/CH4 Separation

Contact Info

Product

Resources

About

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

Improved Synthesis of Hollow Fiber SSZ‐13 Zeolite Membranes for High‐Pressure CO₂/CH₄ Separation