Synthesizing MgO with a high specific surface for carbon dioxide adsorption

被引：75

作者：

Ding, Yu-Dong ^{[1
,2
]}

Song, Gan ^{[1
,2
]}

Zhu, Xun ^{[1
,2
]}

Chen, Rong ^{[1
,2
]}

Liao, Qiang ^{[1
,2
]}

机构：

[1] Chongqing Univ, Minist Educ, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China

[2] Chongqing Univ, Inst Engn Thermophys, Chongqing 400030, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 39期

基金：

国家杰出青年科学基金;

关键词：

CO2; CAPTURE; MAGNESIUM-OXIDE; ADSORBENTS; SORBENT;

D O I：

10.1039/c4ra15127e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work, highly porous MgO was synthesized for CO2 adsorption by a simple and economic thermal decomposition of basic magnesium carbonate and magnesium oxalate. Characterizations of the synthesized samples were accomplished using scanning electron microscopy (SEM), powder X-ray diffraction (XRD), and nitrogen adsorption-desorption isotherms. The results showed that the synthesized MgO possessed a high BET surface area in a range of 161-252 m(2) g(-1) and a highly porous structure. Thermo gravimetric analysis revealed that the synthesized MgO not only showed good selectivity to CO2 but also yielded a CO2 adsorption capacity of as high as 7.59 wt%. Besides, in situ FTIR spectroscopy and CO2 TPD curves demonstrated that the adsorption mechanism of synthesized MgO was mainly attributable to chemisorption and it could be regenerated at relatively low temperature. This work provides a new way to synthesize MgO with a highly porous structure for CO2 adsorption.

引用

页码：30929 / 30935

页数：7

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