Title: CO₂ adsorption performances of amine hybrid silica aerogels synthesised via in-situ polymerisation of hybrid precursors

Authors: Jiayue Zhang; Yong Kong; Xiaodong Shen

Addresses: College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China ' College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China; Key Laboratory of Coal-based CO2 Capture and Geological Storage, China University of Mining and Technology, Jiangsu Province, Xuzhou 221008, China ' College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China

Abstract: Amine hybrid silica aerogels (AHSAs) were synthesised via a one-step sol-gel method under room temperature, using N-(2-aminoethyl)-3-aminopropyltriethoxysilane (AEAPTES) and tetraethyl orthosilicate (TEOS) as precursors. AHSAs with different amine loadings were synthesised by changing the TEOS/AEAPTES ratio. The specific surface area decreases with amine loading. The highest CO₂ adsorption capacity was achieved when the amine loading was 11.90 mmol/g. The corresponding CO₂ adsorption capacities with simulated air (417 ppm CO₂), 1% CO₂ and flue gas (9.68% CO₂) are 1.86, 3.78 and 5.51 mmol/g, respectively. The amine efficiency of AHSA is up to 0.32. The as-prepared sorbent shows excellent cycle stability. The CO₂ adsorption kinetics were also discussed.

Keywords: aerogel; sol-gel; CO₂ adsorption; hybrid precursor; kinetics.

DOI: 10.1504/IJGW.2019.103724

International Journal of Global Warming, 2019 Vol.19 No.3, pp.324 - 332

Received: 06 Dec 2018
Accepted: 27 May 2019
Published online: 25 Nov 2019 *

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