Heterogeneity of Adsorption Sites and Adsorption Kinetics of n-Hexane on Metal-Organic Framework MIL-101(Cr)

Xuejiao Sun; Jinpeng Miao; Jing Xiao; Qibin Xia; Zhenxia Zhao

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Heterogeneity of Adsorption Sites and Adsorption Kinetics of n-Hexane on Metal-Organic Framework MIL-101(Cr)

分离科学与工程 | Updated：2026-01-06

- Heterogeneity of Adsorption Sites and Adsorption Kinetics of n-Hexane on Metal-Organic Framework MIL-101(Cr)
- Chinese Journal of Chemical Engineering Vol. 22, Issue 9, Pages: 962-967(2014)
- Affiliations：
  
  School of Chemistry & Chemical Engineering, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology,Guangzhou,China,510640
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2014
- Accepted：
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Xuejiao Sun, Jinpeng Miao, Jing Xiao, Qibin Xia, Zhenxia Zhao. Heterogeneity of Adsorption Sites and Adsorption Kinetics of n-Hexane on Metal-Organic Framework MIL-101(Cr)[J]. , 2014, 22(9): 962-967.
DOI：

Xuejiao Sun, Jinpeng Miao, Jing Xiao, Qibin Xia, Zhenxia Zhao. Heterogeneity of Adsorption Sites and Adsorption Kinetics of n-Hexane on Metal-Organic Framework MIL-101(Cr)[J]. , 2014, 22(9): 962-967. DOI：

摘要

Abstract

The heterogeneity of adsorption sites and adsorption kinetics of n-hexane on a chromium terephthalate-based metal-organic framework MIL-101(Cr) were studied by gravimetric method and temperature-programmed desorption (TPD) experiments. The MIL-101 crystals were synthesized by microwave irradiation method. The adsorption isotherms and kinetic curves of n-hexane on the MIL-101 were measured. Desorption activation energies of n-hexane fromthe MIL-101 were estimated by TPD experiments. The results showed that equilibrium amount of n-hexane adsorbed on the MIL-101 was up to 5.62 mmol·g

-1

at 298 K and 1.6×10

much higher than that of some activated carbons

zeolites and so on. The isotherms of n-hexane on the MIL-101 could bewell fitted with Langmuir-Freundlich model. TPD spectra exhibit two types of adsorption sites on the MIL-101 with desorption activation energies of 39.41 and 86.69 kJ·mol

-1

. It reflects the surface energy heterogeneity on the MIL-101 frameworks for n-hexane adsorption. The diffusion coefficients of n-hexane are in the range of (1.35-2.35)×10

-10

·s

-1

with adsorption activation energy of 16.33 kJ·mol

-1

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