Adsorption isotherms and selectivity of CH4/C2H6/C3H8 on MOF-505@5GO

WU Houxiao; CHEN Yongwei; LIANG Junjie; SHI Renfeng; XIA Qibin; LI Zhong

doi:10.11949/j.issn.0438-1157.20170670

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Adsorption isotherms and selectivity of CH₄/C₂H₆/C₃H₈ on MOF-505@5GO

更新时间：2025-12-10

- Adsorption isotherms and selectivity of CH₄/C₂H₆/C₃H₈ on MOF-505@5GO
- CIESC Journal Issue 4, Pages: 1500-1507(2018)
- 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.0438-1157.20170670
  CLC： Q028.1TB34
- Online First：05 April 2018，
  
  Published：05 April 2018
- 稿件说明：
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WU Houxiao, CHEN Yongwei, LIANG Junjie, et al. Adsorption isotherms and selectivity of CH₄/C₂H₆/C₃H₈ on MOF-505@5GO[J]. CIESC Journal, 2018, (4): 1500-1507. DOI: 10.11949/j.issn.0438-1157.20170670.
DOI：

WU Houxiao, CHEN Yongwei, LIANG Junjie, et al. Adsorption isotherms and selectivity of CH₄/C₂H₆/C₃H₈ on MOF-505@5GO[J]. CIESC Journal, 2018, (4): 1500-1507. DOI: 10.11949/j.issn.0438-1157.20170670. DOI：

摘要

应用溶剂热法合成了不同氧化石墨烯（GO）负载量的MOF-505@GO复合材料，分别采用全自动表面积吸附仪、P-XRD、SEM和Raman对材料进行了性能表征，测定了CH4、C2H6和C3H8在MOF-505@GO上的吸附等温线，并进行Langmuir-Freundlich方程拟合，依据IAST理论模型计算了C2H6/CH4和C3H8/CH4二元混合气在MOF-505@5GO上的吸附选择性。研究结果表明，随着GO负载量增大，MOF-505@GO复合材料的孔容及BET比表面积先增大后减小，当GO负载量为5%（质量）时，复合材料MOF-505@5GO的孔容及BET比表面积达到最大，当GO负载量进一步增大至8%（质量）和10%（质量）时，复合材料的孔容及BET比表面积逐渐降低。在0.1 MPa和298 K条件下，MOF-505@5GO对CH4、C2H6和C3H8的吸附容量分别为0.88、4.81和5.17 mmol·g-1，相比MOF-505分别提高了14.9%、30.7%和13.1%。MOF-505@5GO对C2H6/CH4和C3H8/CH4的吸附选择性分别为40.1和3056.1，其对C2H6/CH4和C3H8/CH4具有极高的吸附选择性。

Abstract

MOF-505@GO composites with different ratios of MOF-505 to graphite oxide were synthesized by solvothermal method. They were characterized by powder X-ray diffractions(PXRD)

scanning electron microscopy (SEM)

Raman and porosity measurement through nitrogen adsorption. The isotherms of CH4

C2H6 and C3H8 on the MOF-505@GO and MOF-505 were measured separately. Results showed that MOF-505@5GO had the largest pore volumes and BET surface area. The pore volumes and BET surface areas of MOF-505@GO increased as the GO content increased

when GO contents increased to 8%(mass) and 10%(mass)

the opposite trend was observed in which the pore volumes and BET surface areas decreased. Accordingly

MOF-505@5GO exhibited the highest CH4

C2H6 and C3H8 uptake of 0.88

4.81 and 5.17 mmol·g-1 at 298 K and 0.1 MPa

having an increase of 14.9%

30.7% and 13.1%

respectively. Moreover

IAST-predicted C2H6/CH4 selectivity of MOF-505@5GO was about 40.1 and C3H8/CH4 selectivity was about 3056.1. It suggests that MOF-505@5GO is a promising candidate for the separation of C2H6/CH4 and C3H8/CH4.

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