Mathematical modeling and parameter estimation of <scp>MFI</scp> membranes for para/ortho‐xylene separation

Liu, Jingjun; McCool, Benjamin A.; Johnson, Jerry M.; Rangnekar, Neel; Daoutidis, Pródromos; Tsapatsis, Michael

doi:10.1002/aic.17232

Cited by 7 publications

(1 citation statement)

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“…A gel-less synthesis method has been developed for the preparation of thin MFI zeolite membranes on disc supports by Yoon et al − The membrane was as thin as 100 nm, and it displayed a high p- / o- xylene selectivity of 500 . High-silica CHA zeolite membranes were prepared on alumina supports by the gel-less method with the addition of toxic fluoride by Zhang et al , The transformation of aluminum from an alumina support to a zeolite layer cannot be avoided even if all-silica gel is used. ,, No literature reports the gel-less synthesis of a real Si-CHA zeolite membrane in the absence of toxic fluoride.…”

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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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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Process simulation for enhanced p-xylene production via aromatics complex integrated toluene methylation with low-cost methanol feedstock

Wang

Zhang

Yang

et al. 2023

Chemical Engineering Research and Design

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DATA: Diafiltration Apparatus for high-Throughput Analysis

Ouimet

Liu

Brown

et al. 2022

Journal of Membrane Science

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Mathematical modeling and parameter estimation of MFI membranes for para/ortho‐xylene separation

Abstract: A mathematical model of a membrane with a thin, oriented, and selective MFI layer, which also includes contributions from defects, pore blockages, support layer, and external mass transfer, was formulated based on the Maxwell-Stefan equations. It was validated using reported (

Cited by 7 publications

References 80 publications

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

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

Process simulation for enhanced p-xylene production via aromatics complex integrated toluene methylation with low-cost methanol feedstock

DATA: Diafiltration Apparatus for high-Throughput Analysis

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Mathematical modeling and parameter estimation of MFI membranes for para/ortho‐xylene separation

Abstract: A mathematical model of a membrane with a thin, oriented, and selective MFI layer, which also includes contributions from defects, pore blockages, support layer, and external mass transfer, was formulated based on the Maxwell-Stefan equations. It was validated using reported (

Cited by 7 publications

References 80 publications

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

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

Process simulation for enhanced p-xylene production via aromatics complex integrated toluene methylation with low-cost methanol feedstock

DATA: Diafiltration Apparatus for high-Throughput Analysis

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Product

Resources

About

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

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