Adsorption and Diffusion of Carbon Dioxide on Metal−Organic Framework (MOF-5)
Adsorption and Diffusion of Carbon Dioxide on Metal−Organic Framework (MOF-5)
复制标题
DOI：
10.1021/ie900665f
复制
发表时间：
2009-09
影响因子：
4.2
通讯作者：
Z. Zhao;Zhong Li;Y. S. Lin
中科院分区：
文献类型：
--
作者：
Z. Zhao;Zhong Li;Y. S. Lin
采用重量法研究了CO2在微孔金属有机骨架（MOF-5或IRMOF-1）晶体上的吸附平衡和扩散行为。通过溶剂热法合成了尺寸约为40 - 60 μm的MOF-5晶体立方体。CO2在MOF-5上的吸附等温线可以用Freundlich吸附等温式很好地拟合，其吸附等温热约为34 kJ/mol。CO2在MOF-5中的扩散系数在295 - 331 K范围内为8.1 - 11.5 × 10 - 9 cm 2/s，活化能为7.61 kJ/mol。作为从烟道气中分离CO2的吸附剂，MOF-5提供了有吸引力的吸附性能。
Adsorption equilibrium and diffusion of CO2 on microporous metal−organic frameworks (MOF-5, or IRMOF-1) crystals were experimentally studied by the gravimetric method in the pressure range up to 1 atm. The MOF-5 crystal cubes of about 40−60 μm in sizes were synthesized by the solvothermal method. Freundlich adsorption isotherm equation can fit well CO2 adsorption isotherms on MOF-5, with isosteric heat of adsorption of about 34 kJ/mol. Diffusion coefficient of CO2 in the MOF-5 is in the range of 8.1−11.5 × 10−9 cm2/s in 295−331K with activation energy of 7.61 kJ/mol. MOF-5 offers attractive adsorption properties as an adsorbent for separation of CO2 from flue gas.