Adsorption performance of metal-organic framework/carbon aerogel composite adsorbent for CO<sub>2</sub> in simulated flue gas

ZHANG Jiawei; ZUO Lili; WANG Qi; XU Yiling; XIA Kai; SUN Deshuai

doi:10.12434/j.issn.2097-2547.20240133

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Adsorption performance of metal-organic framework/carbon aerogel composite adsorbent for CO₂ in simulated flue gas

- Adsorption performance of metal-organic framework/carbon aerogel composite adsorbent for CO₂ in simulated flue gas
- Vol. 49, Issue 7, Pages: 55-61(2024)
- 作者机构：
  
  1.青岛大学化学化工学院，山东青岛 266071
  2.潍坊工程职业学院教师教育学院，山东潍坊 262500
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240133
  CLC： TQ028
- Published：25 July 2024，
  
  Received：02 April 2024，
  
  Revised：29 April 2024，
- 稿件说明：
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张家伟,左莉莉,王淇等.金属有机骨架/碳气凝胶复合吸附剂对模拟烟气中CO₂的吸附性能[J].低碳化学与化工,2024,49(07):55-61.

ZHANG Jiawei,ZUO Lili,WANG Qi,et al.Adsorption performance of metal-organic framework/carbon aerogel composite adsorbent for CO₂ in simulated flue gas[J].Low-carbon Chemistry and Chemical Engineering,2024,49(07):55-61.
张家伟,左莉莉,王淇等.金属有机骨架/碳气凝胶复合吸附剂对模拟烟气中CO₂的吸附性能[J].低碳化学与化工,2024,49(07):55-61. DOI： 10.12434/j.issn.2097-2547.20240133.

ZHANG Jiawei,ZUO Lili,WANG Qi,et al.Adsorption performance of metal-organic framework/carbon aerogel composite adsorbent for CO₂ in simulated flue gas[J].Low-carbon Chemistry and Chemical Engineering,2024,49(07):55-61. DOI： 10.12434/j.issn.2097-2547.20240133.

摘要

金属有机骨架是重要的CO

吸附材料。为提升吸附剂的CO

吸附性能，改善吸附剂的耐水稳定性，将金属有机骨架与碳气凝胶复合形成复合吸附剂，用于模拟烟气中CO

的分离研究。以海藻酸钠/κ型卡拉胶/壳聚糖混合物为前驱体，通过湿法纺丝技术制备了碳气凝胶；在碳气凝胶表面，以天冬氨酸为有机配体，

铜为金属中心，通过共沉淀方式制备了复合吸附剂（AspCu-CCA）。通过傅里叶变换红外光谱、X射线光电子能谱和扫描电子显微镜等方法对吸附剂进行了表征，通过循环固定床吸附法考察了复合吸附剂对模拟烟气中CO

的吸附性能。结果表明，AspCu-CCA具有良好的CO

吸附性能和耐水稳定性。在298 K、0.1 MPa下，AspCu-CCA对纯CO

的饱和吸附量为323 mg/g，拟一级动力学速率常数为0.083 min

-1

，对体积分数为15%的CO

的饱和吸附量为274 mg/g。烟气中水汽的存在有利于AspCu-CCA CO

吸附量的提升，而SO

的存在则会导致AspCu-CCA CO

吸附量略有降低。复合吸附剂在20次循环吸附中保持了稳定的CO

吸附量，因此具有良好的烟气CO

分离应用潜力。

Abstract

Metal-organic frameworks are important materials for CO

adsorption. To enhance the CO

adsorption performance and improve the water stability of the adsorbents

a composite adsorbent was formed by combining a metal-organic framework with a carbon aerogel for the separation of CO

in simulated flue gas. The carbon aerogel was prepared using a mixture of sodium alginate/κ-carrageenan/chitosan as a precursor by wet spinning technique. The composite adsorbent (AspCu-CCA) was synthesized on the carbon aerogel as the substrate using aspartic acid as the organic ligand and copper as the metal center by co-precipitation. The adsorbents were characterized by Fourier-transform infrared spectroscopy

X-ray photoelectron spectroscopy and scanning electron microscopy. The CO

adsorption performance of the composite adsorbent in simulated flue gas was investigated by cyclic fixed-bed adsorption method. The results show that AspCu-CCA exhibits excellent CO

adsorption performance and water stability. At 298 K and 0.1 MPa

the saturation adsorption capacity of AspCu-CCA for pure CO

is 323 mg/g

with a pseudo-first-order kinetic rate constant of 0.083 min

-1

. The saturation adsorption capacity for CO

with volume fraction of 15% is 274 mg/g. The presence of water vapor in the flue gas enhances the CO

adsorption capacity of AspCu-CCA

while the presence of SO

slightly reduces it. The composite ads

orbent maintains stable CO

adsorption capacity over 20 cycles of adsorption

indicating its application potential for CO

separation in flue gas.

关键词

复合吸附剂金属有机骨架碳气凝胶CO2吸附烟气

Keywords

composite adsorbentmetal-organic frameworkcarbon aerogelCO2 adsorptionflue gas

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Adsorption performance of metal-organic framework/carbon aerogel composite adsorbent for CO2 in simulated flue gas

DOI：10.12434/j.issn.2097-2547.20240133

摘要

Abstract

关键词

Keywords

references

Adsorption performance of metal-organic framework/carbon aerogel composite adsorbent for CO₂ in simulated flue gas