Synthesis of b-oriented MFI nanosheets with high-aspect ratio by suppressing intergrowth with 2D GO nanosheets

Ding, He; Ni, Xiuxiu; Zhang, Yixiao; Zhang, Jingshuang; Zeng, Zhouliangzi; Qi, Menglin; Bai, Peng; Guo, Xianghai

doi:10.1039/c7ce00371d

Cited by 7 publications

(1 citation statement)

References 35 publications

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“…Zeolite membranes have received persistent attention in the past two decades due to their excellent hydrothermal stability and well-defined crystalline micropores that are available for molecular separations. − The separation of same-carbon-number hydrocarbon mixtures such as butane isomers is challenging due to their similar chemical and physical properties. − Other types of membranes including graphene membrane, carbon molecular sieving membrane, polymeric membranes, and mixed matrix membranes − were used for butane isomer separation.…”

Section: Introductionmentioning

confidence: 99%

One-Step Scalable Fabrication of Highly Selective Monolithic Zeolite MFI Membranes for Efficient Butane Isomer Separation

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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The reproducible fabrication of large-area zeolite membranes for gas separation is still a great challenge. We report the scalable fabrication of high-performance zeolite MFI membranes by single-step secondary growth on the 19-channel alumina monoliths for the first time. The packing density and mechanical strength of the monolithic membranes are much higher for these than for tubular ones. Separation performance of the monolithic membranes toward the butane isomer mixture was comparably evaluated using the vacuum and Wicke–Kallenbach modes. The n-butane permeances and n-butane/i-butane separation factors for the three membranes with an effective area of ∼84 cm2 were >1.0 × 10–7 mol (m2 s Pa)−1 and >50 at 343 K for an equimolar n-butane/i-butane mixture, respectively. We succeeded in scaling up the membrane synthesis with the largest area of 270 cm2 to date which has 1.3 times the area of an industrial 1 m long tubular membrane. Monolith supported zeolite MFI membranes show great potential for industrial n-butane/i-butane separation.

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