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.
International Journal of Global Warming, 2019 Vol.19 No.3, pp.324 - 332
Received: 06 Dec 2018
Accepted: 27 May 2019
Published online: 21 Nov 2019 *