Preparation and Adsorption Performance of GrO@Cu-BTC for Separation of CO2/CH4
Preparation and Adsorption Performance of GrO@Cu-BTC for Separation of CO2/CH4
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GrO@Cu-BTC 的制备及其分离 CO2/CH4 的吸附性能
DOI：
10.1021/ie501040s
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发表时间：
2014-07-09
影响因子：
4.2
通讯作者：
Li, Zhong
中科院分区：
文献类型：
--
作者：
Huang, Wenyu;Zhou, Xin;Li, Zhong
采用溶剂热法制备了基于Cu-BTC和氧化石墨烯的复合材料（GrO@Cu-BTC），并将其用于分离CO2/CH 4二元混合气体。然后对合成的复合材料进行表征。用容量法测定了CO2和CH 4在合成材料上的吸附等温线。基于理想吸附溶液理论（IAST）估算了CO2/CH 4二元混合物的等温线和吸附选择性。结果表明，与母体Cu-BTC相比，复合物1GrO@Cu-BTC具有更高的BET表面积和孔体积。更重要的是，与Cu-BTC相比，其对CO2的吸附容量显著提高，在1bar和273 K下达到8.19mmol/g。双中心Langmuir-Freundlich（DSLF）模型适用于CO2和CH 4在样品上的吸附等温线实验数据的拟合。基于IAST预测的二元混合物的等温线表明，CO2比CH 4更有利地吸附在样品1GrO@Cu-BTC上。波士顿警局
Composites (GrO@Cu-BTC) based on Cu-BTC and graphene oxide were synthesized by a solvothermal method for the separation of CO2/CH4 binary mixtures. The as-synthesized composites were then characterized. The isotherms of CO2 and CH4 on the as-synthesized materials were measured by the volumetric method. The isotherms and adsorption selectivities of CO2/CH4 binary mixtures were estimated on the basis of ideal adsorbed solution theory (IAST). The results showed that the composite 1GrO@Cu-BTC had a higher BET surface area and pore volume compared to the parent Cu-BTC. More importantly, its adsorption capacity for CO2 improved significantly in comparison with that of Cu-BTC, which was up to 8.19 mmol/g at 1 bar and 273 K. The dual-site Langmuir–Freundlich (DSLF) model was applied favorably for fitting experimental isotherm data of CO2 and CH4 adsorption on the samples. The predicted isotherms of the binary mixture based on IAST showed that CO2 was more favorably adsorbed than CH4 on the sample 1GrO@Cu-BTC. TPD...