(366a) Advanced Characterization of Disordered Mesoporous Solids
AIChE Annual Meeting
2021
2021 Annual Meeting
Separations Division
Advances in Adsorption and Ion Exchange Technology
Thursday, November 18, 2021 - 8:48am to 9:04am
We show systematically how a model of statistical chain of pores can be applied for solid-liquid phase transitions of porous solids. By creating a kernel-based approach incorporating a variable non-frozen layer thickness between solid core and pore wall and eliminating any a priori assumption of phase transition occurring by metastable or equilibrium transition, we refine the thermoporometry characterization technique.
For verification, we show how this approach works well with ordered materials like MCM-41 porous silica and reveals disorder in SBA-15 materials. This approach can be extended to other phase transition phenomena such as gas adsorption.
References
[1] Schneider D.; Kondrashova D.; Valiullin R., 2017, âPhase transitions in disordered mesoporous solidsâ, Scientific Reports, 7, 7216.
[2] Schneider, D. and Valiullin R., 2019, âCapillary condensation and evaporation in irregular channels: Sorption isotherm for serially connected pore modelâ, Journal of Physical Chemistry C, 123, 16239.
[3] Enninful H.R.N.B., Schneider D., Hoppe A., König S., Fröba M., Enke D. and Valiullin R., 2019, âComparative gas sorption and cryoporometry study of mesoporous glass structure: Application of the serially connected pore modelâ, Frontiers in Chemistry, doi: 10.3389/fchem.2019.00230.
[4] Enninful H.R.N.B., Schneider D., Kohns R., Enke D. and Valiullin R., 2020, âA novel approach for advanced thermoporometry characterization of mesoporous solids: Transition kernels and the serially connected pore modelâ, Microporous and Mesoporous Materials 309, 110534.
[5] Enninful H.R.N.B., Schneider D., Enke D. and Valiullin R., 2021, âImpact of Geometrical Disorder on Phase Equilibria of Fluids and Solids Confined in Mesoporous Materialsâ, Langmuir, 37, 3521-3537.