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A new approach to study adsorption on shales and other microporous solids via the thermogravimetric analysis (TGA) technique
Chemical Engineering Science ( IF 4.7 ) Pub Date : 2021-08-31 , DOI: 10.1016/j.ces.2021.117068
Jiyue Wu 1 , Lin Sun 1 , Kristian Jessen 1 , Theodore Tsotsis 1
Affiliation  

Measuring the adsorption of gases in microporous solids like the shales requires accurate knowledge of the solid’s skeletal volume. Helium (He) is commonly used to determine the sample’s skeletal volume based on the assumption that it does not adsorb in these porous media. The validity of such an assumption for microporous solids has been questioned in recent years, and in this study, we show that it is not applicable for the shale we study. We present a new method to measure the adsorption of shale-gas components in shales, which does not require the use of He to measure the solid’s skeletal volume. Since the proposed analysis method relies on the use of dynamic adsorption data, we also propose here a new zero-point correction method for the magnetic suspension balance, which is better suited for the analysis of such data. We employ the new technique to the study of Argon adsorption in Marcellus shales.



中文翻译:

通过热重分析 (TGA) 技术研究页岩和其他微孔固体吸附的新方法

测量页岩等微孔固体中的气体吸附需要准确了解固体的骨架体积。氦气 (He) 通常用于确定样品的骨架体积,前提是它不会吸附在这些多孔介质中。近年来,这种微孔固体假设的有效性受到质疑,在本研究中,我们表明它不适用于我们研究的页岩。我们提出了一种测量页岩中页岩气组分吸附的新方法,该方法不需要使用 He 来测量固体的骨架体积。由于所提出的分析方法依赖于动态吸附数据的使用,我们在这里还提出了一种新的磁悬浮平衡零点校正方法,它更适合此类数据的分析。

更新日期:2021-09-15
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