山东科学 ›› 2023, Vol. 36 ›› Issue (3): 123-134.doi: 10.3976/j.issn.1002-4026.2023.03.015

• 环境与生态 • 上一篇    下一篇

Mg-MOF-74对CO2/CH4吸附分离的分子动力学模拟及气体吸附性能研究

解祎1,2(), 张晶1,*(), 孙金强1, 刘晓婵1, 伊希斌1, 孙永兴2   

  1. 1.齐鲁工业大学(山东省科学院) 新材料研究所 山东省特种含硅新材料重点实验室, 山东 济南 250014
    2.中国石油大学(华东) 材料科学与工程学院, 山东 青岛 266580
  • 收稿日期:2023-02-16 出版日期:2023-06-20 发布日期:2023-06-07
  • 通信作者: * 张晶,女,副研究员,研究方向为新型能源材料。Tel:0531-82605448,E-mail: zhangjing@sdas.org
  • 作者简介:解祎(1997—),男,硕士研究生,研究方向为气体吸附。E-mail:xy17874236987@163.com
  • 基金资助:
    山东省自然科学基金(ZR2021ME124)

Molecular dynamics simulation and gas adsorption properties of CO2/CH4 adsorbed using Mg-MOF-74

XIE Yi1,2(), ZHANG Jing1,*(), SUN Jinqiang1, LIU Xiaochan1, YI Xibin1, SUN Yongxing2   

  1. 1. Shandong Provincial Key Laboratory of Special Silicon-containing Material, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
    2. School of Materials Science and Engineering, China University of Petroleum(East China), Qingdao 266580, China
  • Received:2023-02-16 Online:2023-06-20 Published:2023-06-07

摘要:

天然气是一种环保型能源并且可被广泛用做化工原料,但是其中的CO2会严重影响天然气的热值与输送性能,因此对天然气中的CO2进行有效脱除尤为重要。选用Mg-MOF-74作为吸附剂,采用分子动力学模拟计算方法分析Mg-MOF-74对CO2/CH4吸附分离性能的影响。模拟计算结果显示,在一定的温度、压强条件下,CO2比CH4更容易与Mg-MOF-74的金属位点相结合,Mg-MOF-74对CO2气体的相互作用力更强,从而证明Mg-MOF-74对CO2的吸附能力也更好。为验证模拟结果的准确性,制备了Mg-MOF-74并测试了其CO2/CH4吸附性能,实验结果与模拟结果一致,证明Mg-MOF-74对CO2有很高的选择性。

关键词: 金属有机骨架, 气体吸附分离, 分子动力学模拟, 模拟计算, 材料化学

Abstract:

Natural gas is an environmentally friendly energy source that can be used in various chemical raw materials. However, the presence of CO2 in natural gas has a significant impact on the heat value and transportation performance of natural gas. Therefore, effective CO2 removal from natural gas is critical. In this study, Mg-MOF-74 was selected as an adsorbent and its effect on CO2/CH4 adsorption and separation performance was investigated using a molecular dynamics simulation method. Based on the simulation results, at certain pressure and temperature settings, CO2 is more likely to bind to the metal sites of Mg-MOF-74 than CH4. Moreover, Mg-MOF-74 exhibits a stronger interaction force with CO2 gas, indicating a higher capacity for CO2 adsorption. To verify the accuracy of the simulation results, Mg-MOF-74 was prepared and its CO2/CH4 adsorption performance was tested.The experiment results is consistent with the simulation,that proved Mg-MOF-74 is more attractive to CO2.

Key words: metal-organic frameworks, gas adsorption and desorption, molecular dynamics simulation, simulation, materials chemistry

中图分类号: 

  • TB34