Synthesis of mesoporous magnesium oxide: Its application to CO2 chemisorption
Synthesis of mesoporous magnesium oxide: Its application to CO2 chemisorption
复制标题
DOI：
10.1016/j.ijggc.2009.08.001
复制
发表时间：
2010-01-01
影响因子：
3.9
通讯作者：
Jang, Hyun Tae
中科院分区：
文献类型：
--
作者：
Bhagiyalakshmi, Margandan;Lee, Ji Yun;Jang, Hyun Tae
以介孔分子筛SBA-15为模板剂制备的介孔碳CMK-3为外模板剂合成了介孔氧化镁（MgO）。以P123为模板剂，稻壳灰（RHA）为硅源合成了介孔分子筛SBA-15，然后用蔗糖和硫酸处理得到了介孔炭（CMK-3）。X射线粉末衍射（XRD）结果和由SBA-15、CMK-3和介孔MgO的N-2吸附/脱附研究获得的具有H1滞后的IV型吸附等温线表明其与使用常规二氧化硅源合成的材料相似。在TGA中对介孔MgO进行CO2吸附研究;吸附在25和100 ℃下分别为8和10重量%。最后，介孔MgO对CO2气体具有选择性，热稳定性和可再生性。因此，本研究为提高CO2气体吸附性能和利用生态废弃物稻壳合成高效介孔材料提供了一条较好的途径。(C)2009爱思唯尔有限公司保留所有权利。
Mesoporous magnesium oxide (MgO) was synthesized using mesoporous carbon CMK-3 obtained from mesoporous SBA-15 as exotemplate. P123 was used as the structure-directing template and rice husk ash (RHA) as the silica source for the synthesis of SBA-15, which was subsequently treated with sucrose and sulphuric acid to obtain mesoporous; carbon (CMK-3). X-ray powder diffraction (XRD) results and the type-IV adsorption isotherm with H1 hysteresis obtained by N-2 adsorption/desorption study for SBA-15, CMK-3 and mesoporous MgO suggests its resemblance with materials synthesized using conventional silica sources. Mesoporous MgO was subjected for CO2 adsorption study in TGA; adsorption was 8 and 10 wt% at 25 and 100 degrees C, respectively. Finally, mesoporous MgO is selective to CO2 gas, thermally stable and regenerable. Thus, this study contributes a better route to enhance CO2 gas adsorption and use ecological waste rice husk for the synthesis of such efficient mesoporous materials. (C) 2009 Elsevier Ltd. All rights reserved.