Development of Mass Production Technology of Highly Permeable Nano-Porous Supports for Silica-Based Separation Membranes

Sawamura, Ken-ichi; Okamoto, Shigeru; Todokoro, Yoshihiro

doi:10.3390/membranes9080103

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Development of Mass Production Technology of Highly Permeable Nano-Porous Supports for Silica-Based Separation Membranes

Ken-ichi Sawamura

Shigeru Okamoto

and

Yoshihiro Todokoro

eSep Inc., Keihanna Open Innovation Center @ Kyoto (KICK),1-5-7 Seikadai, Seika-cho, Souraku-gun, Kyoto 619-0238, Japan

Author to whom correspondence should be addressed.

Membranes 2019, 9(8), 103; https://doi.org/10.3390/membranes9080103

Received: 2 July 2019 / Revised: 14 August 2019 / Accepted: 14 August 2019 / Published: 16 August 2019

(This article belongs to the Special Issue Preparation, Characterization and Application of Silica-Based Membranes)

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Abstract

Silica-based membranes show both robust properties and high-permeability, offering us great potential for applying them to harsh conditions where conventional organic membranes cannot work. Despite the increasing number of paper and patents of silica-based membranes, their industrial applications have yet to be fully realized, possibly due to their lack of technologies on scaling-up and mass production. In particular, quality of membrane supports decisively impacts final quality of silica-based separation membranes. In this study, therefore, we have developed mass producing technologies of nano-porous supports (φ 12 mm, length 400 mm) with surface center pore size distribution of 1–10 nm, which are generally used as supports for preparing separation membranes with a pore size of less than 1 nm. The developed mass production apparatuses have enabled us to reproducibly produce nano-porous silica-based supports with high permeance (e.g., N₂ permeance of more than 10⁻⁵ mol m⁻² s⁻¹·Pa⁻¹) minimizing effects of membrane defects less than 0.1% of the total flux. The developed nano-porous supports have enabled us to reproducibly produce silica-based separation membranes with high permeace and selectivity (e.g., H₂ permeance of about 5 × 10⁻⁶ mol m⁻² s⁻¹ Pa⁻¹ and H₂/SF₆ permeance ratio of more than 2000). View Full-Text

Keywords: gas separation; pore size control; molecular sieve

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MDPI and ACS Style

Sawamura, K.-i.; Okamoto, S.; Todokoro, Y. Development of Mass Production Technology of Highly Permeable Nano-Porous Supports for Silica-Based Separation Membranes. Membranes 2019, 9, 103. https://doi.org/10.3390/membranes9080103

AMA Style

Sawamura K-i, Okamoto S, Todokoro Y. Development of Mass Production Technology of Highly Permeable Nano-Porous Supports for Silica-Based Separation Membranes. Membranes. 2019; 9(8):103. https://doi.org/10.3390/membranes9080103

Chicago/Turabian Style

Sawamura, Ken-ichi, Shigeru Okamoto, and Yoshihiro Todokoro. 2019. "Development of Mass Production Technology of Highly Permeable Nano-Porous Supports for Silica-Based Separation Membranes" Membranes 9, no. 8: 103. https://doi.org/10.3390/membranes9080103

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Development of Mass Production Technology of Highly Permeable Nano-Porous Supports for Silica-Based Separation Membranes

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