用于CO吸附的胺在乙醇萃取的SBA-15上的接枝
Grafting of Amines on Ethanol-Extracted SBA-15 for CO Adsorption.
作者信息
Li Yong, Sun Nannan, Li Lei, Zhao Ning, Xiao Fukui, Wei Wei, Sun Yuhan, Huang Wei
机构信息
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China.
Graduated University of Chinese Academy of Sciences, Beijing 100049, China.
出版信息
Materials (Basel). 2013 Mar 12;6(3):981-999. doi: 10.3390/ma6030981.
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), N₂ 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.
通过乙醇萃取法去除模板制备的SBA - 15与三种胺前驱体（单氨基硅烷、二氨基硅烷、三氨基硅烷）进行接枝，以合成新型CO₂吸附剂。采用X射线衍射（XRD）、小角X射线散射（SAXS）、N₂吸附/脱附、热重分析（TG）、元素分析、傅里叶变换红外（FTIR）光谱、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对SBA - 15载体及所制备的吸附剂进行了表征。结果发现，除了具有更高的硅醇密度外，乙醇萃取的SBA - 15载体比传统煅烧样品具有更规则的中间相和更厚的孔壁，这使得吸附剂在蒸汽处理下具有良好的稳定性。研究发现，不同胺接枝样品的吸附容量不仅受表面胺密度的影响，还受其物理化学性质的影响。这些研究结果为进一步研究胺接枝吸附剂在实际CO₂捕集过程中的应用提供了重要支持。
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