摘要
Novel CO2 adsorbents for CO2 removal were prepared by introducing tetraethylenepentamine (TEPA) into SBA-16 type mesoporous silica using a post-synthetic impregnation method. The properties of the mesoporous materials before and after surface modification were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), and N2 adsorption-desorption. We confirmed that TEPA was loaded onto the surface of the channels in the mesoporous materials. The surface area, pore size, and pore volume of TEPA-loaded SBA-16 decreased with an increase in TEPA loading while its fundamental pore structure was unchanged. The dynamic adsorption of CO2 onto TEPA-loaded SBA-16 as well as its regeneration property was studied in a packed column. The total adsorption capacity and breakthrough capacity increased when the amount of loaded TEPA increased from 10% to 30% (w). The sample impregnated with 30% TEPA showed the highest breakthrough capacity and total adsorption capacity of about 0.625 and 0.973 mmol·g-1 at 60 °C, respectively. From 60 °C to 80 °C, the CO2 dynamic adsorption behavior of TEPA-loaded SBA-16 was stable. The total adsorption capacity of CO2 on TEPA-loaded SBA-16 dropped slightly (6.45%) after 20 adsorption-desorption regeneration cycles. Their CO2 adsorption behavior was also investigated using the deactivation model, which showed an excellent predictive capability for the breakthrough curves.
源语言 | 英语 |
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页(从-至) | 3023-3029 |
页数 | 7 |
期刊 | Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica |
卷 | 26 |
期 | 11 |
DOI | |
出版状态 | 已出版 - 11月 2010 |
已对外发布 | 是 |