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C02 adsorption performance of ZIF-7 and its endurance in flue gas components

Frontiers of Environmental Science & Engineering 2014年第2期8卷 162-168页

作者： 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

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 micro- scopy （SEM） and Na adsorption analysis. ZIF-8 with the SOD structure and a littl 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 CO： adsorption capacity on ZIF-7 was about 48 mL. gl while the capacity on ZIF-8 was about 18mg.g-1 （at 12C and 0.98 P/Po 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

关键词： ZIF-7 structural stability CO2 capture ther- mal stability

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CO2 adsorption performance of ZIF-7 and its endurance infiue gas components

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Frontiers of Environmental Science & Engineering 2014年第2期8卷 162-168页

作者： jiangkun xie naiqiang yan fei liu zan qu shijian yang ping liu School of Environmental Science and Engineering Shanghai Jiao Tong University

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 N2adsorption 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 CO2capture from simulatedfiue gas was investigated through physical adsorption method. The results showed that CO2adsorption capacity on ZIF-7 was about 48 mL.g–1while the capacity on ZIF-8was about 18 mg.g–1(at 12°C and 0.98 P/P0relative pressure). Furthermore, the impact of fiue gas components on adsorption capacity of ZIF-7 and the selectivity of CO2against N2on ZIF-7 was also investigated in this work.

关键词： ZIF-7 structural stability CO 2 capture thermal stability

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