Bimodal Mesoporous Carbon-Coated MgO Nanoparticles for CO2 Capture at Moderate Temperature Conditions

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• 作者：Zhongzheng Zhang ; Jianyuan Li ; Jian Sun ; Hui Wang ; Wei Wei ; Yuhan Sun
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：July 27, 2016
• 年：2016
• 卷：55
• 期：29
• 页码：7880-7887
• 全文大小：528K
• 年卷期：0
• ISSN：1520-5045

文摘

Bimodal mesoporous carbon supported MgO (MgOMC) materials were prepared to provide a candidate for trapping CO₂ in flue gas at high temperature by an impregnation method. Textural properties of MgOMC were characterized by X-ray diffraction, N₂ adsorption/desorption isotherm, scanning electron microscopy, transmission electron microscopy and an element mapping method, and their CO₂ adsorption behaviors in both pure CO₂ and 10 vol % CO₂ simulated flue gas were evaluated by a thermal gravimetric method at ambient temperature. Effects of MgO content in composite and calcination temperature on CO₂ adsorption capacity were studied. Results showed that MgOMC samples with high content of basic MgO sites and well-developed porous structure exhibit high CO₂ uptakes at 75 °C, rapid adsorption kinetics, excellent CO₂ selectivity in flue gas and good regenerability under mild temperature below 300 °C, indicating their potential application in the CO₂ capture from flue gas.