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Adsorption of carbon dioxide by a novel amine impregnated ZSM-5/KIT-6 composite

机译:用新型胺浸渍ZSM-5 / kit-6复合材料吸附二氧化碳

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摘要

A novel amine modified composite was fabricated for CO2 capture. Tetraethylenepentamine (TEPA) or polyethyleneimine (PEI) was selected to modify the micro/mesoporous ZSM-5/KIT-6 composite (ZK). With the porous nature of the support, large amine loadings from 50 to 80% were expected via a typical impregnation step. The CO2 adsorption performance was investigated by thermal gravimetric analysis (TGA) in mixed gases (15% CO2 and the balance is N-2) at 30-90 degrees C. With higher nitrogen content and better texture properties (surface area and total pore volume), TEPA-loaded materials exhibited better adsorption capacities than PEI-loaded materials. In the two series of samples, ZK-TEPA-60 and ZK-PEI-60 displayed outstanding CO2 capture, with capacities as high as 5.32 and 4.59 mmol g(-1) at 60 and 75 degrees C, respectively. ZK-TEPA-60 demonstrated relatively rapid kinetics and a higher enthalpy. The materials we designed displayed excellent CO2 adsorption performance in comparison with other amine modified solid materials, indicating the prospects of these adsorbents for CO2 capture from flue gas.
机译:制造了一种新型胺改性复合材料,用于CO 2捕获。选择四亚乙二胺(TEPA)或聚乙烯(PEI)以改性微/介孔ZSM-5 / KIT-6复合物(ZK)。随着载体的多孔性质,通过典型的浸渍步骤预期50至80%的大胺负载。在30-90℃下,通过混合气体(15%CO 2)的热重分析(TGA)来研究CO 2吸附性能,以30-90℃。具有更高的氮含量和更好的质地性能(表面积和总孔体积),加载TEPA的材料表现出比PEI负载材料更好的吸附容量。在两系列样品中,ZK-TEPA-60和ZK-PEI-60分别显示出优异的CO2捕获,其容量分别为5.32和4.59mmol G(-1),分别为60和75摄氏度。 ZK-TEPA-60展示了相对较快的动力学和更高的焓。与其他胺改性固体材料相比,我们设计的材料显示出优异的CO 2吸附性能,表明这些吸附剂的前景来自烟气的二氧化碳。

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  • 来源
    《RSC Advances》 |2017年第86期|共9页
  • 作者单位

    Guilin Univ Technol Guangxi Sci Expt Ctr Min Met &

    Environm Guilin 541004 Peoples R China;

    Guilin Univ Technol Guangxi Sci Expt Ctr Min Met &

    Environm Guilin 541004 Peoples R China;

    Guilin Univ Technol Guangxi Sci Expt Ctr Min Met &

    Environm Guilin 541004 Peoples R China;

    Guilin Univ Technol Guangxi Sci Expt Ctr Min Met &

    Environm Guilin 541004 Peoples R China;

    Guilin Univ Technol Guangxi Sci Expt Ctr Min Met &

    Environm Guilin 541004 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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