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首页> 外文期刊>Journal of industrial and engineering chemistry >Synthesis of copper exchanged heteropolyacids supported on MCM-48 and its application for CO2 adsorption
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Synthesis of copper exchanged heteropolyacids supported on MCM-48 and its application for CO2 adsorption

机译：MCM-48负载铜交换杂多酸的合成及其在CO2吸附中的应用

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Copper-encapsulated heteropolyacid-impregnated mesoporous MCM-48 (Cu-HPA-MCM-48) with copper in a reduced state was synthesized, and the CO2 adsorption capacity was monitored. The synthesized material was characterized by XRD, N2 adsorption-desorption, FT-IR, DSC, CO2-TPD and XPS. The low angle X-ray diffraction pattern of the Cu-HPA-MCM-48 demonstrates the encapsulation of copper inside the pore by the disappearance of higher-order peaks. This result is further supported by the presence of Cu_(2p)~3 and W_(4f) peaks in XPS. The CO2 adsorption capacity of Cu-HPA-MCM-48 was 70 mg/g at 25 °C. The energy of desorption and the heat of the reaction (AHr) were 21.2 kJ/mol and 490 Btu/lb, respectively, as determined by CO2-TPD and DSC. As the AHr value of Cu-HPA-MCM-48 approaches the CO2 benchmark value (580 Btu/lb), the catalyst exhibited improved CO2 capturing capacity.
机译：合成了具有铜的还原态的铜包埋的杂多酸浸渍的介孔MCM-48（Cu-HPA-MCM-48），并监测了CO 2吸附能力。通过XRD，N2吸附-脱附，FT-IR，DSC，CO2-TPD和XPS对合成材料进行了表征。 Cu-HPA-MCM-48的低角度X射线衍射图表明，高阶峰的消失表明铜在孔内的包裹。 XPS中存在Cu_（2p）〜3和W_（4f）峰进一步支持了此结果。 Cu-HPA-MCM-48在25°C下的CO2吸附容量为70 mg / g。通过CO2-TPD和DSC测定，解吸能量和反应热（AHr）分别为21.2 kJ / mol和490 Btu / lb。当Cu-HPA-MCM-48的AHr值接近CO2基准值（580 Btu / lb）时，催化剂的CO2捕集能力提高。

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