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Net, Excess, and Absolute Adsorption of N2, CH4, and CO2 on Metal–Organic Frameworks of ZIF-8, MIL-101(Cr), and UiO-66 at 282–361 K and up to 12 MPa
Journal of Chemical & Engineering Data ( IF 2.6 ) Pub Date : 2020-12-03 , DOI: 10.1021/acs.jced.0c00738
Xiaoxian Yang 1 , Arash Arami-Niya 1, 2 , Jiafei Lyu 3, 4 , Xianghai Guo 3, 4, 5
Affiliation  

Experimental gas adsorption data on particular porous solids, reported in the literature, typically disagree within large scales. Besides, the literature data are generally hard to be reproduced within stated uncertainties, and sometimes no uncertainty information is provided. Therefore, in an effort toward standardization of adsorption measurements, this work offers high-quality N2, CH4, and CO2 adsorption data on three metal-organic frameworks (MOFs) of ZIF-8, MIL-101(Cr), and UiO-66 with detailed traceable uncertainty information. The adsorption capacity of gases was measured with a gravimetric sorption analyzer, incorporated with a magnetic-suspension balance, over the temperature range of 282–361 K and pressure up to 12 MPa. The high-pressure adsorption data enabled us to study the micro- and mesoporosities of the adsorbents in more detail. The relative combined expanded uncertainty (k = 2) of the measured absolute adsorption capacity is in the order of 40 and 2% at the lowest and highest pressures, respectively. The measurement results show that MIL-101(Cr) has the highest adsorption capacity for all the three gases, followed by UiO-66 and ZIF-8; and all three MOFs, particularly UiO-66, present a reasonable selectivity for CO2 over CH4 and N2 and have the potential to be utilized in the separation of CO2 from these gas mixtures.

中文翻译:

ZIF-8,MIL-101(Cr)和UiO-66的金属-金属骨架上在282-361 K和12 MPa以下的净,过量和绝对吸附N 2,CH 4和CO 2

文献中报道的特定多孔固体的实验气体吸附数据通常在大规模范围内存在分歧。此外,文献数据通常难以在规定的不确定性内进行复制,并且有时不提供不确定性信息。因此,在努力实现吸附测量的标准化方面,这项工作提供了高质量的N 2,CH 4和CO 2。ZIF-8,MIL-101(Cr)和UiO-66的三个金属有机骨架(MOF)上的吸附数据以及详细的可追踪不确定性信息。气体的吸附能力是通过重力吸附分析仪与磁悬浮天平结合起来测定的,温度范围为282–361 K,压力最高为12 MPa。高压吸附数据使我们能够更详细地研究吸附剂的微孔和中孔。相对组合扩展不确定度(k= 2)在最低和最高压力下,测得的绝对吸附容量分别约为40%和2%。测量结果表明,MIL-101(Cr)对这三种气体均具有最高的吸附容量,其次是UiO-66和ZIF-8。所有三个MOF,特别是UiO-66,对CH 2和N 2的CO 2表现出合理的选择性,并且有潜力用于从这些气体混合物中分离CO 2
更新日期:2021-01-14
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