Aminosilane-Grafted Zirconia-Titiania-Silica Nanoparticles/Torlon Hollow Fiber Composites for CO2 Capture

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• 作者：Prof. Ali A. Rownaghi ; Amit Kant ; Xin Li ; Harshul Thakkar ; Amit Hajari ; Yingxin He ; Patrick J. Brennan ; Hooman Hosseini ; Prof. William J. Koros and Prof. Fateme Rezaei
• 刊名：ChemSusChem
• 出版年：2016
• 出版时间：May 23, 2016
• 年：2016
• 卷：9
• 期：10
• 页码：1166-1177
• 全文大小：2410K
• ISSN：1864-564X

文摘

In this work, the development of novel binary and ternary oxide/Torlon hollow fiber composites comprising zirconia, titania, and silica as amine supports was demonstrated. The resulting binary (Zr-Si/PAI–HF, Ti-Si/PAI–HF) and ternary (Zr-Ti-Si/PAI–HF) composites were then functionalized with monoamine-, diamine-, and triamine-substituted trialkoxysilanes and were evaluated in CO₂ capture. Although the introduction of both Zr and Ti improved the CO₂ adsorption capacity relative to that with Si/PAI–HF sorbents, zirconia was found to have a more favorable effect on the CO₂ adsorption performance than titania, as previously demonstrated for amine sorbents in the powder form. The Zr-Ti-Si/PAI–HF sample with an oxide content of 20 wt % was found to exhibit a relatively high CO₂ capacity, that is, 1.90 mmol g⁻¹ at atmospheric pressure under dry conditions, owing to more favorable synergy between the metal oxides and CO₂. The ternary fiber sorbent showed improved sorption kinetics and long-term stability in cyclic adsorption/desorption runs.