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CO2 adsorption performance of ZIF-7 and its endurance in flue gas components |
Jiangkun XIE, Naiqiang YAN(), Fei LIU, Zan QU, Shijian YANG, Ping LIU |
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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Abstract Porous ZIF-7 with the sodalite (SOD) cage structure (ZIF, Zeolitic imidazolate framework) were synthesized by the solvothermal method. Synthesized material was characterized by powder X-ray diffraction (PXRD), thermal gravity (TG), scanning electron microscopy (SEM) and N2 adsorption analysis. ZIF-8 with the SOD structure and a little larger pore window was synthesized in a similar way and was characterized for comparisons. Thermal stability and structural stability of ZIF-7 were tested through PXRD analysis, and the capability of the material for CO2 capture from simulated flue gas was investigated through physical adsorption method. The results showed that CO2 adsorption capacity on ZIF-7 was about 48 mL·g-1 while the capacity on ZIF-8 was about 18 mg·g-1 (at 12°C and 0.98 P/P0 relative pressure). Furthermore, the impact of flue gas components on adsorption capacity of ZIF-7 and the selectivity of CO2 against N2 on ZIF-7 was also investigated in this work.
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Keywords
ZIF-7
structural stability
CO2 capture
thermal stability
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Corresponding Author(s):
YAN Naiqiang,Email:nqyan@sjtu.edu.cn
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Issue Date: 01 April 2014
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