| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2024-12-10 |
| タイトル |
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タイトル |
Impact of Trifluoroacetic Acid on Tetraethoxysilane and Amine-Functionalized Tetraethoxysilane Silica Membranes for CO2 Separation |
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言語 |
en |
| 作成者 |
Rana, Ikram
Moriyama, Norihiro
Nagasawa, Hiroki
Tsuru, Toshinori
Kanezashi, Masakoto
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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言語 |
en |
|
権利情報 |
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial & Engineering Chemistry Research, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.iecr.4c01367 |
| 権利情報 |
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言語 |
en |
|
権利情報 |
This is not the published version. Please cite only the published version. |
| 権利情報 |
|
|
言語 |
ja |
|
権利情報 |
この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。 |
| 内容記述 |
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|
内容記述 |
Amorphous silica derived from tetraethoxysilane (TEOS) is known for its remarkable properties, including high chemical and thermal stabilities. However, its inherent structure presents challenges for effective CO2/N2 separation, owing to the difficulty in controlling the silica pore size, considering the similar sizes of CO2 (0.33 nm) and N2 (0.36 nm) molecules. In this study, we investigated the impact of trifluoroacetic acid (TFA) and amine (APTES: 3-aminopropyltriethoxysilyl) concentrations, aiming to leverage tailored silica structures with enhanced CO2 affinity. Specifically, a two-stage investigation was conducted by first examining the influence of TFA on the pore structure of the TEOS networks, followed by an analysis of the CO2 separation performance using composite TEOS–APTES membranes in the presence of TFA. While the TEOS (TFA) membrane exhibited a CO2 permeance of 10–6 mol m–2 s–1 Pa–1, its CO2/N2 permselectivity remained low. However, introducing TFA into the TEOS–APTES structure resulted in a notable transformation of the primary amine (NH2) groups into amide (−NHCOCF3) functionalities, along with improved microporous properties. This was confirmed by FT-IR spectroscopy, reversible CO2 adsorption/desorption, and the high uptake of adsorbed N2. The resulting composite TEOS–APTES (TFA) membranes with APTES concentrations of 2 and 5 mol % demonstrated enhanced CO2 permeation properties, achieving a CO2/N2 selectivity of 15 and 35, respectively. This improvement is attributed to the increased pore volume and the introduction of amide functionalities (−NHCOCF3), which exhibit mild affinity for CO2. These findings suggest that the developed composite (TEOS–APTES) membranes are promising for industrial applications that require efficient CO2 separation. |
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言語 |
en |
| 出版者 |
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出版者 |
American Chemical Society |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 関連情報 |
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|
関連タイプ |
isVersionOf |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
https://doi.org/10.1021/acs.iecr.4c01367 |
| 開始ページ |
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開始ページ |
11602 |
| 書誌情報 |
en : Industrial & Engineering Chemistry Research
巻 63,
号 26,
p. 11602-11612,
発行日 2024-06-24
|
IECR_63_11602.pdf (1.2 MB)
