Integral Mass Balance (IMB) Method for Measuring Multicomponent Gas Adsorption Equilibria in Nanoporous Materials
Integral Mass Balance (IMB) Method for Measuring Multicomponent Gas Adsorption Equilibria in Nanoporous Materials
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用于测量纳米多孔材料中多组分气体吸附平衡的积分质量平衡 (IMB) 方法
DOI：
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发表时间：
2020
影响因子：
4.2
通讯作者：
M. Benham
中科院分区：
文献类型：
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作者：
D. Broom;O. Talu;M. Benham
为了评估性能，必须确定多组分气体吸附平衡
Multicomponent gas adsorption equilibria must be determined in order to assess the performance
of an adsorbent for a particular gas separation and for process design. The experimental
techniques commonly used for this purpose, however, are time-consuming and typically require
large samples. In this article, we describe a new approach, called the Integral Mass Balance
(IMB) method, which combines the controlled flow of a gas mixture with in-situ gravimetric
measurement and gas composition analysis using quadrupole mass spectrometry. The IMB
method allows very rapid equilibrium multicomponent gas adsorption measurements to be
performed on samples weighing only a few grams. The method is demonstrated and validated by
performing binary O2/N2 adsorption measurements on a commercial 5A zeolite, at ambient temperature and a total pressure of 0.915 MPa. Excellent agreement with previously published
data was found, using a 3.5 g sample, with a measurement time of only four hours for a twenty
point isotherm. In contrast, other techniques of equivalent accuracy would require around twenty
days of experimental effort to collect a comparable amount of data. Selectivities were also
calculated and shown to agree with previously published results. In principle, the technique
could readily be extended to measure gas adsorption from ternary or higher mixtures.