CO2 Adsorption Performance of ZIF-7 and its Endurance in Flue Gas Components
  • 【摘要】

    The capture of carbon dioxide from flue gas of fossil-fuel combustion is the vital step in carbon sequestration,microporous zeolitic imidazolate frameworks (ZIFs), a sub-family of metal-organic framew... 展开>>The capture of carbon dioxide from flue gas of fossil-fuel combustion is the vital step in carbon sequestration,microporous zeolitic imidazolate frameworks (ZIFs), a sub-family of metal-organic framework of metal-organic frameworks (MOFs), have been regarded as the promising sorbents to selectively adsorb CO2 from mixed gas. Porous ZIF-7 material was synthesized for such purposes in this study, and was characterized by powder X-ray diffraction (PXRD), thermal gravimetric (TG), scanning electron microscope (SEM), and BET technique. For comparison, ZIF-8 with the same SOD structure but larger pore window was also synthesized and characterized. Through the experiment, ZIF-7 displayed its high thermal stability and its stability in the presence of moisture, SO2 and NO which were common flue gas components. The CO2 adsorption capacity of ZIF-7 was about 48 ml/g at 0.98 P/P0 and 285 K, this amount was not the best but among the top performance (Yazaydin, 2009) at relatively low pressure and facile temperature. Furthermore, this capacity was not significantly influenced by pre-treating the material in flue gas components. The high selectivity of CO2 against N2 on ZIF-7 was also illustrated through packed bed experiment which further displayed its promising potential for CO2 capture in adsorption process such as pressure swing adsorption. 收起<<

  • 【作者】

    YANG Shi-jian  QU Zan  YAN Nai-qiang  XIE Jiang-kun 

  • 【作者单位】

    School

  • 【会议名称】

    第五届全国博士生会议暨环境科学与工程新理论、新技术学术研讨会

  • 【会议时间】

    2011-10-20

  • 【会议地点】

    北京

  • 【主办单位】

    中国环境科学学会   清华大学

  • 【语种】

    chi

  • 【关键词】

    ZIF-7  Structure stability  CO2 capture  Influence of flue gas components