Enhanced separation performance of a novel composite material GrO@MIL-101 for CO2/CH4 binary mixture
Enhanced separation performance of a novel composite material GrO@MIL-101 for CO2/CH4 binary mixture
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新型复合材料 GrO@MIL-101 对 CO2/CH4 二元混合物的增强分离性能
DOI：
10.1016/j.cej.2014.12.021
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发表时间：
2015-04
影响因子：
15.1
通讯作者：
Li, Zhong
中科院分区：
文献类型：
--
作者：
Xia, Qibin;Zhang, Zhijuan;Wang, Haihui;Li, Zhong
以MIL-101（Cr）和氧化石墨烯（GrO）为原料，制备了一种新型的GrO@MIL-101复合材料，并对其进行了表征和分离CO2/CH 4混合气体的实验研究。GrO@MIL-101具有比母体MIL-101更高的BET表面积和更好的孔隙率。采用重量法分别测定了不同温度下CO2和CH 4的等温线，并用双中心Langmuir-Freundlich（DSLF）模型进行了拟合。与MIL-101相比，GrO@MIL-101对CO2的吸附能力显著提高，在25 bar和298 K下达到22.4 mmol g− 1，远高于传统吸附剂和大多数其他MOF。用理想吸附溶液理论（IAST）估算了CO2/CH 4二元混合物的吸附等温线和选择性。虽然计算的等温线表明CO2比CH 4更有利地吸附在GrO@MIL-101上，但GrO@MIL-101复合物的吸附选择性比原始MIL-101显著增强。在1.5 bar压力下，GrO@MIL-101对CO2/CH 4（10：90）混合气体的选择性高达32，具有天然气的特征，是MIL-101的3倍多。GrO@MIL-101对CO2和CH 4的吸附等温热略高于母体MIL-101。GrO@MIL-101对CO2的吸附也表现出明显的准可逆性，在5个循环中表现出超过95%的解吸效率。
A novel GrO@MIL-101 composite consisting of graphene oxide (GrO) and MIL-101(Cr) was synthesized, characterized and tested for separation of CO2/CH4mixture. GrO@MIL-101 had higher BET surface area and better porosity than parent MIL-101. CO2and CH4isotherms were separately measured at different temperatures using a gravimetric method, and were fitted using the dual-site Langmuir–Freundlich (DSLF) model. The adsorption capacity of GrO@MIL-101 for CO2was significantly improved over MIL-101, reaching 22.4 mmol g−1at 25 bar and 298 K, much higher than traditional adsorbents and most other MOFs. The isotherms and selectivities of CO2/CH4binary mixture were estimated using the ideal adsorbed solution theory (IAST). While calculated isotherms indicated CO2was more favorably adsorbed on GrO@MIL-101 than CH4, the adsorption selectivity of GrO@MIL-101 composite was dramatically enhanced over pristine MIL-101. At 1.5 bar, the selectivity of GrO@MIL-101 for CO2/CH4(10:90) mixture with a characteristic of natural gas was up to 32, which was more than three times of that of MIL-101. Isosteric heats of adsorption for CO2and CH4on GrO@MIL-101 were slightly above those on parent MIL-101. GrO@MIL-101 also displayed remarkable quasi-reversibility for CO2adsorption, showing more than 95% desorption efficiency over five cycles.
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影响因子：
4.7
作者：
Wen-Bo Zhang;Hao Liu;Cheng-gong Sun;T. Drage;C. Snape
通讯作者：
Wen-Bo Zhang;Hao Liu;Cheng-gong Sun;T. Drage;C. Snape
DOI：
10.1021/la202924y
发表时间：
2011-10
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
C. Petit;Liangliang Huang;J. Jagiello;J. Kenvin;K. Gubbins;T. Bandosz
通讯作者：
C. Petit;Liangliang Huang;J. Jagiello;J. Kenvin;K. Gubbins;T. Bandosz
氧化石墨烯诱导的纳米Cu-MOFs和增强的气体储存能力
影响因子：
32.5
作者：
Liu, Shuang;Sun, Lixian;Schick, Christoph
通讯作者：
Schick, Christoph
DOI：
10.1524/zpch.1999.208.part_1_2.274
发表时间：
1999
期刊：
Zeitschrift für Physikalische Chemie
影响因子：
--
作者：
G. Öhlmann
通讯作者：
G. Öhlmann
影响因子：
3.7
作者：
R. Snurr;J. Hupp;S. Nguyen
通讯作者：
R. Snurr;J. Hupp;S. Nguyen