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Synthesizing MgO with a high specific surface for carbon dioxide adsorption

机译：合成具有高比表面积的MgO以吸附二氧化碳

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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.
机译：在这项工作中，通过碱性碳酸镁和草酸镁的简单而经济的热分解，合成了高孔隙度的MgO，用于CO2吸附。合成样品的表征使用扫描电子显微镜（SEM），粉末X射线衍射（XRD）和氮吸附-解吸等温线完成。结果表明，合成的MgO具有在162-152 m（2）g（-1）范围内的高BET表面积和高度多孔的结构。热重分析表明，合成的MgO不仅对CO2表现出良好的选择性，而且对CO2的吸附能力高达7.59 wt％。此外，原位FTIR光谱和CO2 TPD曲线表明，合成的MgO的吸附机理主要归因于化学吸附，并且可以在较低的温度下再生。这项工作为合成具有高孔隙结构的MgO吸附CO2提供了一种新方法。

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