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Open AccessArticle

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

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

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