期刊
MATERIALS
卷 6, 期 3, 页码 981-999出版社
MDPI
DOI: 10.3390/ma6030981
关键词
amine; grafting; ethanol extraction; SBA-15; CO2 adsorption
类别
资金
- Lu'an Group
- Knowledge Innovation Programme of the Chinese Academy of Science [KGCX2-YW-323]
- Ministry of Science and Technology of the People's Republic of China [2009BWZ003]
- Chinese Academy of Sciences [XDA05010109, XDA05010110, XDA05010204]
- Natural Science Foundation of China [50976116]
SBA-15 prepared via ethanol extraction for template removing was grafted with three kinds of amine precursors (mono-, di-, tri-aminosilanes) to synthesis new CO2 adsorbents. The SBA-15 support and the obtained adsorbents were characterized by X-ray diffraction (XRD), small-angle X-ray scattering (SAXS), N-2 adsorption/desorption, thermogravimetry (TG), elemental analysis, Fourier transform infrared (FTIR) spectrometry, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that, except higher silanol density, the ethanol-extracted SBA-15 support possessed a more regular mesophase and thicker walls than traditionally calcined samples, leading to a good stability of the adsorbent under steam treatment. The adsorption capacity of different amine-grafted samples was found to be influenced by not only the surface amine density, but also their physiochemical properties. These observations provide important support for further studies of applying amine-grafted adsorbents in practical CO2 capture process.
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