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化工学报  2013 

氨基改性层状双氢氧化物的制备及其二氧化碳吸附机理

DOI: 10.3969/j.issn.0438-1157.2013.02.028, PP. 616-623

Keywords: 二氧化碳,吸附,原位红外光谱,层状双氢氧化物,氨基

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Abstract:

以氨基硅烷为改性剂,采用超声剥脱的方法合成了氨基改性的层状双氢氧化物。利用元素分析、X射线衍射(XRD)、漫反射红外傅里叶变换光谱(DRIFTS)和热重分析(TGA)等技术对样品进行了表征。研究了样品在25~150℃温度范围内的二氧化碳吸附能力。在80℃下,NiMgAlN2在纯CO2和15%CO2/N2混合气中达到最大吸附容量,分别为2.02mmol·g-1和1.89mmol·g-1。吸附/脱附再生实验显示140℃为最佳的脱附温度。利用原位漫反射傅里叶红外光谱对二氧化碳在样品上的吸附进行了机理研究。

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