CH<sub>4</sub>/N<sub>2</sub> adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites

JIA Xiaoxia; WANG Li; YUAN Ning; YANG Jiangfeng; LI Jinping

doi:10.11949/j.issn.0438-1157.20180302

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CH₄/N₂ adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites

更新时间：2025-12-10

- CH₄/N₂ adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites
- CIESC Journal Issue 9, Pages: 3896-3904(2018)
- 作者机构：
  
  1. 太原理工大学化学化工学院精细化工研究所,山西,太原,030024
  2. 气体能源高效清洁利用山西省重点实验室,山西,太原,030024
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180302
  CLC： Q028.8
- Online First：05 September 2018，
  
  Published：05 September 2018
- 稿件说明：
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JIA Xiaoxia, WANG Li, YUAN Ning, et al. CH₄/N₂ adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites[J]. CIESC Journal, 2018, (9): 3896-3904. DOI: 10.11949/j.issn.0438-1157.20180302.
DOI：

JIA Xiaoxia, WANG Li, YUAN Ning, et al. CH₄/N₂ adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites[J]. CIESC Journal, 2018, (9): 3896-3904. DOI: 10.11949/j.issn.0438-1157.20180302. DOI：

摘要

基于金属有机骨架材料中金属空配位对气体的强吸附作用，利用具有较高活性的二价金属Cr2+/Mo2+/Ni2+与均苯三酸（H3BTC）配位合成了HKUST-1（Cu-BTC）同构系列材料M-BTC（M=Cr、Mo、Ni），并与Cu-BTC对比分析了该类型材料中不同金属空配位对甲烷和氮气的吸附性能。实验结果显示，此三种材料均具有较好的甲烷选择吸附性，其中含Ni2+金属空位的Ni-BTC以其尤为突出的甲烷吸附热值而呈现较好的CH4/N2分离潜力；Cr2+空配位虽具有较强活性，但是对于甲烷的选择性吸附性能却低于含Cu2+空位的Cu-BTC材料。结合吸附选择性IAST计算分析得到此三种含较高活性不饱和金属空配位的MOFs材料对于甲烷选择性吸附作用能顺序为：Ni-BTC > Mo-BTC > Cu-BTC > Cr-BTC。

Abstract

Based on the strong interaction energy between the coordinatively unsaturated metal sites (UMSs) and the gas molecules

M-BTC(M=Cr

Ni)

isostructural with HKUST-1 (Cu-BTC)

were successfully synthesized via the coordination reaction of the high activity divalent metal (Cr2+/Mo2+/Ni2+) and organic ligand (H3BTC)

and then to gain insight into the impact of gas-metal interactions on the selective adsorption of CH4 from N2 by comparing with classical materials (Cu-BTC). The results show the good CH4 selective adsorption properties of M-BTC (M=Cr

Ni) with UMSs. Among these materials

Ni-BTC with unsaturated Ni2+ sites presents the highest adsorption heat value for CH4

leading to the excellent CH4/N2 adsorption separation properties; but the Cr-BTC with high Cr2+ activity shows the lower ability for CH4/N2 separation than Cu-BTC. Combined the IAST calculation results

we verified the ability for the selective adsorption of CH4 molecules on M-BTC (M=Cr

Ni) and Cu-BTC followed as Ni-BTC > Mo-BTC > Cu-BTC > Cr-BTC.

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CH4/N2 adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites

DOI：10.11949/j.issn.0438-1157.20180302

摘要

Abstract

关键词

Keywords

references

CH₄/N₂ adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites