CO<sub>2</sub> and CH<sub>4</sub> adsorption performance of modified MIL-53(Cr) via ammonia vapor

YANG Yan; WANG Sha; ZHANG Zhijuan; XIAQibin; LI Zhong

doi:10.3969/j.issn.0438-1157.2014.05.028

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CO₂ and CH₄ adsorption performance of modified MIL-53(Cr) via ammonia vapor

更新时间：2025-12-10

- CO₂ and CH₄ adsorption performance of modified MIL-53(Cr) via ammonia vapor
- CIESC Journal Issue 5, (2014)
- 作者机构：
  
  1. 华南理工大学化学与化工学院,广东,广州,510640
  2. 暨南大学大气环境安全与污染控制研究所,广东,广州,510632
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.05.028
  CLC： Q013
- Online First：05 May 2014，
  
  Published：05 May 2014
- 稿件说明：
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YANG Yan, WANG Sha, ZHANG Zhijuan, et al. CO₂ and CH₄ adsorption performance of modified MIL-53(Cr) via ammonia vapor[J]. CIESC Journal, 2014, (5). DOI: 10.3969/j.issn.0438-1157.2014.05.028.
DOI：

YANG Yan, WANG Sha, ZHANG Zhijuan, et al. CO₂ and CH₄ adsorption performance of modified MIL-53(Cr) via ammonia vapor[J]. CIESC Journal, 2014, (5). DOI: 10.3969/j.issn.0438-1157.2014.05.028. DOI：

摘要

采取水热法成功合成MIL-53（Cr）晶体，分别应用0.1、1、3 mol·L-1的氨气对MIL-53（Cr）进行改性，制得系列的NH3@MIL-53（Cr）-1#，NH3@MIL-53（Cr）-2#，NH3@MIL-53（Cr）-3#。实验结果表明：与原始的MIL-53（Cr）晶体相比，尽管制得NH3@MIL-53（Cr）系列材料的比表面积依次减少，但其单位比表面积的CO2吸附容量大小依次为：NH3@MIL-53（Cr）-3#>NH3@MIL-53（Cr）-2#>NH3@MIL-53（Cr）-1#。表明氨气改性会使得材料表面的碱性增强，从而增强了其对酸性气体CO2的吸附。此外，改性后的NH3@MIL-53（Cr）对水蒸气的吸附量明显减少，表明其憎水性能得到改善。较高浓度氨气改性会导致材料的比表面积大幅下降，会引起单位质量吸附剂的吸附容量下降。用1 mol·L-1浓度的氨气改性得到的NH3@MIL-53（Cr）-2#，不仅对CO2的吸附容量最大，而且对CH4的吸附容量明显下降，这将有助于进一步提高改性材料NH3@MIL-53（Cr）-2# 对CO2/CH4的吸附选择性。

Abstract

MIL-53(Cr)crystals were synthesized by the hydrothermal synthesis method

and then modified by ammonia vapor of different concentrations to obtain the modified materials NH3@MIL-53(Cr). The CO2 and water vapor isotherms on the NH3@MIL-53(Cr)were determined by means of the gravity method. Although the specific surface area of the modified materials NH3@MIL-53(Cr)became smaller compared to original MIL-53(Cr)

their CO2 adsorption capacities per unit surface area of adsorbent became significantly higher

following the order: NH3@MIL-53(Cr)-3#>NH3@MIL-53(Cr)-2#>NH3@MIL-53(Cr)-1#. In addition

Isotherms of water vapor on the modified samples NH3@MIL-53(Cr) were lower than those on the MIL-53(Cr)

suggesting significant improvement of hydrophobicity of the modified samples. The CO2 adsorption capacity of the NH3@MIL-53(Cr)-2# modified by using ammonia vapor of 1 mol·L-1 was the highest among the modified samples. More interestingly

the CO2 adsorption performance of the modified sample NH3@MIL-53 (Cr)-2# was significantly improved

while its CH4 adsorption performance was weakened

which would be helpful to enhance its selectivity for CO2/CH4 adsorption.

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CO2 and CH4 adsorption performance of modified MIL-53(Cr) via ammonia vapor

DOI：10.3969/j.issn.0438-1157.2014.05.028

摘要

Abstract

关键词

Keywords

references

CO₂ and CH₄ adsorption performance of modified MIL-53(Cr) via ammonia vapor