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

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 H(2)/SF(6) permeance ratios were between 150 and 450. The methanol con...

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Detalles Bibliográficos
Autores principales: Tanizume, Shusei, Yoshimura, Toshihiro, Ishii, Katsunori, Nomura, Mikihiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7074238/
https://www.ncbi.nlm.nih.gov/pubmed/32046126
http://dx.doi.org/10.3390/membranes10020026
Descripción
Sumario: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 H(2)/SF(6) 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.

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