CNT@Cu3(BTC)2 and Metal鈥揙rganic Frameworks for Separation of CO2/CH4 Mixture
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- 作者：Zhonghua Xiang ; Xuan Peng ; Xuan Cheng ; Xiujin Li ; Dapeng Cao
- 刊名：Journal of Physical Chemistry C
- 出版年：2011
- 出版时间：October 13, 2011
- 年：2011
- 卷：115
- 期：40
- 页码：19864-19871
- 全文大小：1106K
- 年卷期：v.115,no.40(October 13, 2011)
- ISSN：1932-7455
文摘
Effectively separating CO2 from the natural gas, which is one of alternative 鈥渇riendly鈥?fuels, is a very important issue. A hybrid material CNT@Cu3(BTC)2 has been prepared to separate CO2 from the CO2/CH4 mixture. For comparison of separation efficiency, a series of representative metal鈥搊rganic frameworks (MOF-177, UMCM-1, ZIF-8, MIL-53 (Al), and Cu3(BTC)2) have also been synthesized by the solvothermal method. Adsorption isotherms of CO2 and CH4 pure gases are measured by Hiden Isochema Intelligent Gravimetric Analyzer (IGA-003). The dual-site Langmuir鈥揊reundlich (DSLF)-based ideal adsorption solution theory (IAST) is used to predict adsorption of each component in the CO2/CH4 mixture. The IAST-predicted results show that the hybrid material CNT@Cu3(BTC)2 exhibits the greatest selectivity among the six materials, and its selectivity keeps in the range of 5.5 to 7.0 for equimolar CO2/CH4 mixture at 1 < p < 20 bar, which is higher than activated carbons. Moreover, the selectivity of CNT@Cu3(BTC)2 for the CO2/CH4 mixture keeps almost no change with the composition of CH4, which is one of the excellent properties as a promising separation material. In short, this hybrid material CNT@Cu3(BTC)2 shows great potential in separation and purification of CO2 from various CO2/CH4 mixtures by adsorptive processes in important industrial systems.