活性炭/金属有机骨架复合吸附材料的制备及其CH4/N2吸附分离性能研究
Study on preparation of activated carbon/metal-organic frameworks composite adsorbent materials and their CH4/N2 adsorption and separation performance
- 低碳化学与化工 2023, 48(5): 163-169.
- 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：
宋志强（1995—），硕士研究生，研究方向为复合材料制备及气体吸附分离，E-mail：1332378163@qq.com。
杨江峰（1982—），博士，教授，研究方向为低浓度甲烷综合利用基础理论和关键技术，E-mail：yangjiangfeng@tyut.edu.cn。
- 基金信息：国家自然科学基金企业创新联合基金集成项目(U20B6004)
DOI：10.12434/j.issn.2097-2547.20230044
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宋志强, 王玉高, 张宇姝, 等. 活性炭/金属有机骨架复合吸附材料的制备及其CH4/N2吸附分离性能研究[J]. 低碳化学与化工, 2023,48(5):163-169.
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, 2023,48(5):163-169.
宋志强, 王玉高, 张宇姝, 等. 活性炭/金属有机骨架复合吸附材料的制备及其CH4/N2吸附分离性能研究[J]. 低碳化学与化工, 2023,48(5):163-169. DOI： 10.12434/j.issn.2097-2547.20230044.
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, 2023,48(5):163-169. 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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