AM-TEPA Impregnated Disordered Mesoporous Silica as CO2 Capture Adsorbent for Balanced Adsorption鈥揇esorption Properties
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- 作者：Xiaoyun Zhang ; Xiuxin Zheng ; Sisi Zhang ; Bei Zhao ; Wei Wu
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2012
- 出版时间：November 21, 2012
- 年：2012
- 卷：51
- 期：46
- 页码：15163-15169
- 全文大小：300K
- 年卷期：v.51,no.46(November 21, 2012)
- ISSN：1520-5045
文摘
A disordered mesoporous silica was found to be a promising solid support for CO2 capture. It was prepared with a process similar to that for MCM-41. X-ray diffraction characterization (XRD) and transmission electron microscopy (TEM) confirmed its disordered structure. N2 adsorption鈥揹esorption tests indicated that its average pore size is significantly larger than that of MCM-41. On this support was deposited acrylamide (AM)-modified tetraethylenepentamine (TEPA), resulting in an adsorbent suitable for CO2 capture. This material exhibited well balanced adsorption and desorption properties. Substantially higher CO2 adsorption capacity (159.1 mg/g-adsorbent) was obtained with pure CO2 at 25 掳C, and satisfactory stability during 12 adsorption鈥揹esorption turnovers was achieved.