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Control of Sequential MTO Reactions through an MFI-Type Zeolite Membrane Contactor

Department of Applied Chemistry, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
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Membranes 2020, 10(2), 26; https://doi.org/10.3390/membranes10020026
Received: 14 December 2019 / Revised: 27 January 2020 / Accepted: 6 February 2020 / Published: 7 February 2020
(This article belongs to the Special Issue Membranes for Energy, Optics, and Electronics)
A membrane for controlling methanol-to-olefin (MTO) reactions was developed, which featured an MFI-type zeolite membrane (Si/Al = 25) that was synthesized on a porous α-alumina substrate using a secondary growth method. Here, the H2/SF6 permeance ratios were between 150 and 450. The methanol conversion rate was 70% with 38% ethylene selectivity and 28% propylene selectivity as determined using a cross-flow membrane contactor. In order to improve the olefin selectivity of the membrane, the MFI zeolite layer (Si/Al = ∞) was coated on an MFI-type zeolite membrane (Si/Al = 25). Using this two-layered membrane system, the olefin selectivity value increased to 85%; this was 19% higher than the value obtained during the single-layer membrane system.
Keywords: zeolite membrane; MFI-type zeolite; membrane contactor; MTO reaction; silicalite-1 coating; catalyst regeneration zeolite membrane; MFI-type zeolite; membrane contactor; MTO reaction; silicalite-1 coating; catalyst regeneration
MDPI and ACS Style

Tanizume, S.; Yoshimura, T.; Ishii, K.; Nomura, M. Control of Sequential MTO Reactions through an MFI-Type Zeolite Membrane Contactor. Membranes 2020, 10, 26.

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