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


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.


Chemical and Biochemical Engineering

Keywords and Phrases

Adsorption; Atmospheric Pressure; Bins; Fibers; Nanoparticles; Silanes; Silica; Silicon; Titanium Compounds; Titanium Dioxide; Titanium Oxides; Zirconia; Zirconium; Adsorption Capacities; Adsorption Performance; Adsorption/Desorption; Functionalized; Hollow Fiber; Long Term Stability; Silica Nanoparticles; Sorption Kinetics; Carbon Dioxide; Silane Derivative; Silicon Dioxide; Titanium; Zirconium Oxide; Chemistry; Kinetics; Porosity; Imides; Kinetics; Nylons; CO2 Capture; Hollow Fiber Composites

International Standard Serial Number (ISSN)

1864-5631; 1864-564X

Document Type

Article - Journal

Document Version


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Publication Date

01 May 2016

PubMed ID