Anatomy of adsorption in open-end and closed-end slit mesopores: adsorption, desorption, and equilibrium branches of hysteresis loop

Zeng, Yonghong, Phadungbut, Poomiwat, Do, D. D. and Nicholson, D. (2014) Anatomy of adsorption in open-end and closed-end slit mesopores: adsorption, desorption, and equilibrium branches of hysteresis loop. Journal of Physical Chemistry C, 118 44: 25496-25504. doi:10.1021/jp507600s


Author Zeng, Yonghong
Phadungbut, Poomiwat
Do, D. D.
Nicholson, D.
Title Anatomy of adsorption in open-end and closed-end slit mesopores: adsorption, desorption, and equilibrium branches of hysteresis loop
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7455
1932-7447
Publication date 2014-11-06
Year available 2014
Sub-type Article (original research)
DOI 10.1021/jp507600s
Volume 118
Issue 44
Start page 25496
End page 25504
Total pages 9
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2015
Language eng
Abstract We present a detailed analysis, using simulated data, of the adsorption and desorption in two finite length slit mesopores, one with both ends open to the surroundings and the other with one end closed, to investigate the microscopic behavior of an adsorbate in a confined space. The mesoscopic analysis of the interface separating the gas-like phase and the condensed phase reveals the mechanisms that lead to hysteresis in these two types of pore. The effects of pore width, temperature, and surface strength on these mechanisms are also studied to probe the detailed behavior of the system just before condensation and just after evaporation. In particular, for closed-end pores, we observe the development of a meniscus and the subsequent movement of the developed meniscus in adsorption and desorption. From these observations we are able to explain why adsorption and desorption branches have two distinct sections, slow and fast variations with pressure (corresponding to the two stages (1) developing meniscus and (2) developed meniscus), which have not been recognized in earlier literature.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
 
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