Expansion or contraction of slit pores due to gas uptake
Adsorption inside a slit pore of flexible width w is explored, with a focus on how w varies as a function of the external pressure P of a gas in equilibrium with the adsorbate within the pore. The analysis is first carried out in general, using a minimization of the thermodynamic grand potential ene...
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2011
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222291_v163_n5-6_p284_Ancilotto http://hdl.handle.net/20.500.12110/paper_00222291_v163_n5-6_p284_Ancilotto |
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paper:paper_00222291_v163_n5-6_p284_Ancilotto2023-06-08T14:47:30Z Expansion or contraction of slit pores due to gas uptake Hernández, Ester Susana Capillary condensation Imbibition Physisorption in pores Adsorption system Capillary condensation Classical fluids Elastic parameters Equilibrium behavior External pressures Finite temperatures Gas uptake Host materials Imbibition IT contracts Low-density fluids Slit pores Slit width Adsorbates Fluids Physisorption Behavioral research Adsorption inside a slit pore of flexible width w is explored, with a focus on how w varies as a function of the external pressure P of a gas in equilibrium with the adsorbate within the pore. The analysis is first carried out in general, using a minimization of the thermodynamic grand potential energy of the system. This leads to an equation predicting both the gas uptake N as a function of chemical potential μ and the expansion (or contraction) of the pore in response to the adsorbate's pressure. The resulting equilibrium behavior depends on the elastic parameters of the host material. Explicit results are derived for three adsorption systems: a low density fluid, Ar (a classical fluid at finite temperature T) in a graphite pore and 4He within a Au pore at T=0. The resulting behaviors include some situations where the pore expands and others for which it contracts. The difference arises from the sign of the thermodynamic response of the fluid as a function of slit width. © 2011 Springer Science+Business Media, LLC. Fil:Hernández, E.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222291_v163_n5-6_p284_Ancilotto http://hdl.handle.net/20.500.12110/paper_00222291_v163_n5-6_p284_Ancilotto |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Capillary condensation Imbibition Physisorption in pores Adsorption system Capillary condensation Classical fluids Elastic parameters Equilibrium behavior External pressures Finite temperatures Gas uptake Host materials Imbibition IT contracts Low-density fluids Slit pores Slit width Adsorbates Fluids Physisorption Behavioral research |
| spellingShingle |
Capillary condensation Imbibition Physisorption in pores Adsorption system Capillary condensation Classical fluids Elastic parameters Equilibrium behavior External pressures Finite temperatures Gas uptake Host materials Imbibition IT contracts Low-density fluids Slit pores Slit width Adsorbates Fluids Physisorption Behavioral research Hernández, Ester Susana Expansion or contraction of slit pores due to gas uptake |
| topic_facet |
Capillary condensation Imbibition Physisorption in pores Adsorption system Capillary condensation Classical fluids Elastic parameters Equilibrium behavior External pressures Finite temperatures Gas uptake Host materials Imbibition IT contracts Low-density fluids Slit pores Slit width Adsorbates Fluids Physisorption Behavioral research |
| description |
Adsorption inside a slit pore of flexible width w is explored, with a focus on how w varies as a function of the external pressure P of a gas in equilibrium with the adsorbate within the pore. The analysis is first carried out in general, using a minimization of the thermodynamic grand potential energy of the system. This leads to an equation predicting both the gas uptake N as a function of chemical potential μ and the expansion (or contraction) of the pore in response to the adsorbate's pressure. The resulting equilibrium behavior depends on the elastic parameters of the host material. Explicit results are derived for three adsorption systems: a low density fluid, Ar (a classical fluid at finite temperature T) in a graphite pore and 4He within a Au pore at T=0. The resulting behaviors include some situations where the pore expands and others for which it contracts. The difference arises from the sign of the thermodynamic response of the fluid as a function of slit width. © 2011 Springer Science+Business Media, LLC. |
| author |
Hernández, Ester Susana |
| author_facet |
Hernández, Ester Susana |
| author_sort |
Hernández, Ester Susana |
| title |
Expansion or contraction of slit pores due to gas uptake |
| title_short |
Expansion or contraction of slit pores due to gas uptake |
| title_full |
Expansion or contraction of slit pores due to gas uptake |
| title_fullStr |
Expansion or contraction of slit pores due to gas uptake |
| title_full_unstemmed |
Expansion or contraction of slit pores due to gas uptake |
| title_sort |
expansion or contraction of slit pores due to gas uptake |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222291_v163_n5-6_p284_Ancilotto http://hdl.handle.net/20.500.12110/paper_00222291_v163_n5-6_p284_Ancilotto |
| work_keys_str_mv |
AT hernandezestersusana expansionorcontractionofslitporesduetogasuptake |
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1768543932031959040 |