期刊
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
卷 26, 期 4, 页码 633-644出版社
SPRINGER
DOI: 10.1007/s10450-020-00228-1
关键词
QSDFT equilibrium model; Tensile strength effect; Pore size distributions; Adsorption; Desorption
资金
- Hainan Provincial Natural Science Foundation of China [2018CXTD332, HD-SYSZX-201802]
- Science and Technology Development Special Fund Project [ZY2018HN09-3, ZY2019HN09]
- National Natural Science Foundation of China [51362009, 21603048]
The pore size distribution (PSD) is an important property of the porous materials, but an accurate and reliable PSD is very difficult to obtain. Quenched Solid Density Functional Theory (QSDFT) is widely used to analyze the pore size distribution. Here, a series of unclosed and closed isotherms of activated carbon were measured and compared. The experimental results revealed the appearance of an artefact peak in the PSD for the unclosed isotherms by employing QSDFT equilibrium model. Moreover, the location of the artificial peak is highly related to the end point of the desorption branch. In addition, tensile strength effect (TSE) illustrates the limit of mechanical stability of liquids in pores, and subsequent cavitation generates an artefact peak at around 2.8 nm. Interestingly, it was found that isotherm data associated with TSE can be used to calculate the total pore volume of all large cavities in which cavitation occurs.
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