Adsorption isotherms and selectivity of CO/N<sub>2</sub>/CO<sub>2</sub> on MOF-74(Ni)

LIU Youyi; HUANG Yan; HE Jiajie; XIAO Jing; XIA Qibin; LI Zhong

doi:10.11949/j.issn.0438-1157.20150504

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Adsorption isotherms and selectivity of CO/N₂/CO₂ on MOF-74(Ni)

更新时间：2025-12-10

- Adsorption isotherms and selectivity of CO/N₂/CO₂ on MOF-74(Ni)
- CIESC Journal Issue 11, Pages: 4469-4475(2015)
- 作者机构：
  
  华南理工大学化学与化工学院,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150504
  CLC： B383O647
- Online First：05 November 2015，
  
  Published：05 November 2015
- 稿件说明：
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LIU Youyi, HUANG Yan, HE Jiajie, et al. Adsorption isotherms and selectivity of CO/N₂/CO₂ on MOF-74(Ni)[J]. CIESC Journal, 2015, (11): 4469-4475. DOI: 10.11949/j.issn.0438-1157.20150504.
DOI：

LIU Youyi, HUANG Yan, HE Jiajie, et al. Adsorption isotherms and selectivity of CO/N₂/CO₂ on MOF-74(Ni)[J]. CIESC Journal, 2015, (11): 4469-4475. DOI: 10.11949/j.issn.0438-1157.20150504. DOI：

摘要

主要研究了MOF-74(Ni)材料对CO/N2/CO2的吸附分离性能。应用水热法合成制备MOF-74(Ni)

分别采用全自动表面积吸附仪、P-XRD、扫描电子显微镜对材料的孔隙结构和晶体形貌进行了表征

应用静态吸附法测定了CO、N2和CO2在MOF-74(Ni)上的吸附等温线

应用DSLF方程模拟了3种气体MOF-74(Ni)上的吸附等温线

依据IAST理论模型计算了MOF-74(Ni)对CO/N2二元混合物和CO/CO2二元混合物的吸附选择性。研究结果表明:在0.1 MPa和常温条件下

MOF-74(Ni)材料对CO吸附容量高达6.15 mmol·g-1

而相同条件下N2的吸附量只有0.86 mmol·g-1。MOF-74(Ni)在低压下(0～40 kPa)对CO的吸附量明显高于其对CO2的吸附量。应用IAST模型估算MOF-74(Ni)对二元混合物吸附选择性的结果表明:MOF-74(Ni)对CO/N2混合物的吸附选择性在1000以上;MOF-74(Ni)对CO/CO2的吸附选择性在4～9范围

在所研究的二元气体混合物吸附体系中

MOF-74(Ni)都能优先吸附CO。

Abstract

This work investigates the adsorption performance of adsorbent MOF-74(Ni) for CO/N2 and CO2/CO2 binary gas mixtures. Adsorbent MOF-74(Ni) with high density of coordinatively unsaturated sites was synthesized by a hydrothermal method

and characterized with N2 adsorption

P-XRD

and SEM. The adsorption isotherms of CO

N2 and CO2 on MOF-74(Ni) were measured

and the selectivities for CO/N2 and CO/CO2 were calculated based on ideal adsorbed solution theory (IAST). Results showed that adsorbent MOF-74(Ni) achieved superior CO adsorption capacity of 6.15 mmol·g-1 at 298 K and 0.1 MPa

and as low as 0.86 mmol·g-1 for N2. In low pressure range of 0—40 kPa

MOF-74(Ni) showed significantly higher uptake for CO than that for CO2. Moreover

IAST-predicted CO/N2 selectivity of MOF-74(Ni) is above 1000

and its CO/CO2 selectivity is in the range of 4—9. It suggests that MOF-74(Ni) is more favorable for CO adsorption than N2 and CO2 adsorption.

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Adsorption isotherms and selectivity of CO/N2/CO2 on MOF-74(Ni)

DOI：10.11949/j.issn.0438-1157.20150504

摘要

Abstract

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Adsorption isotherms and selectivity of CO/N₂/CO₂ on MOF-74(Ni)