Study on preparation of activated carbon/metal-organic frameworks composite adsorbent materials and their CH<sub>4</sub>/N<sub>2</sub> adsorption and separation performance

SONG Zhiqiang; WANG Yugao; ZHANG Yushu; ZHANG Yingying; YANG Jiangfeng

doi:10.12434/j.issn.2097-2547.20230044

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Study on preparation of activated carbon/metal-organic frameworks composite adsorbent materials and their CH₄/N₂ adsorption and separation performance

- Study on preparation of activated carbon/metal-organic frameworks composite adsorbent materials and their CH₄/N₂ adsorption and separation performance
- Vol. 48, Issue 5, Pages: 163-169(2023)
- 作者机构：
  
  1.太原理工大学化学工程与技术学院，山西太原 030024
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20230044
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SONG Zhiqiang, WANG Yugao, ZHANG Yushu, et al. Study on preparation of activated carbon/metal-organic frameworks composite adsorbent materials and their CH₄/N₂ adsorption and separation performance. [J]. Low-carbon Chemistry and Chemical Engineering 48(5):163-169(2023)
DOI：

SONG Zhiqiang, WANG Yugao, ZHANG Yushu, et al. Study on preparation of activated carbon/metal-organic frameworks composite adsorbent materials and their CH₄/N₂ adsorption and separation performance. [J]. Low-carbon Chemistry and Chemical Engineering 48(5):163-169(2023) DOI： 10.12434/j.issn.2097-2547.20230044.

摘要

煤层气富含甲烷（CH,4,），但井下抽采时会混入大量空气导致CH,4,浓度低、利用难度大，因此富集提浓并高效利用低浓度煤层气的关键是实现CH,4,与氮气（N,2,）的高效分离。以三水硝酸铜（Cu(NO,3,),2,•3H,2,O）和异烟酸（HINA）为原料，通过逐步合成法制备了活性炭/金属有机骨架（AC/MOFs）复合吸附材料，通过X射线衍射、热重分析和扫描电子显微镜等进行了表征，并研究了气体吸附性能、选择性以及吸附热。结果表明，制备的AC/Cu(INA),2,复合材料具有AC和Cu(INA),2,的特征衍射峰，并且观察到了Cu（INA）,2,在AC上的生长。AC/Cu(INA),2,复合材料在100 kPa、298 K下的CH,4,吸附量为12.6 cm,3,/g，CH,4,/N,2,选择性为5.5（比原材料AC提升了17.3%），并且CH,4,（14.9 kJ/mol）的吸附热高于N,2,（11.9 kJ/mol）。

Abstract

Coal bed methane is rich in methane (CH,4,), but it is mixed with a lot of air during underground mining, resulting in low CH,4 ,concentration and difficult utilization. Therefore, the key to enrichment and efficient utilization of low concentrate coal bed methane is efficient separation of CH,4, and nitrogen (N,2,). Activated carbon/metal organic frameworks (AC/MOFs) composite adsorbent materials were prepared from copper nitrate trihydrate (Cu(NO,3,),2,•3H,2,O) and isonicotinic acid (HINA) by stepwise synthesis and characterised by X-ray diffraction, thermogravimetric analysis and scanning electron microscopy, and the gas adsorption properties, selectivity and heat of adsorption were investigated. The results show that the prepared AC/Cu(INA),2, composite material has characteristic diffraction peaks of AC and Cu(INA),2, and Cu(INA),2, growth on AC is observed. AC/Cu(INA),2, composite material has a CH,4, adsorption capacity of 12.6 cm,3,/g at 100 kPa and 298 K, and a CH,4,/N,2, selectivity of 5.5 (17.3% increase compared to the raw material AC). Additionally, the adsorption heat of CH,4, (14.9 kJ/mol) is higher than that of N,2, (11.9 kJ/mol).

关键词

甲烷氮气活性炭金属有机骨架复合材料逐步合成法

Keywords

methanenitrogenactivated carbonmetal-organic frameworkscomposite materialsstepwise synthesis

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Study on preparation of activated carbon/metal-organic frameworks composite adsorbent materials and their CH4/N2 adsorption and separation performance

DOI：10.12434/j.issn.2097-2547.20230044

摘要

Abstract

关键词

Keywords

references

Study on preparation of activated carbon/metal-organic frameworks composite adsorbent materials and their CH₄/N₂ adsorption and separation performance