Adsorption-Induced Deformation of Zeolites 4A and 13X: Experimental and Molecular Simulation StudyClick to copy article linkArticle link copied!
- Alina EmelianovaAlina EmelianovaOtto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, New Jersey 07102, United StatesMore by Alina Emelianova
- Christian BalzerChristian BalzerCenter for Applied Energy Research, Magdalene-Schoch-Str. 3, Wuerzburg 97074, GermanyMore by Christian Balzer
- Gudrun ReichenauerGudrun ReichenauerCenter for Applied Energy Research, Magdalene-Schoch-Str. 3, Wuerzburg 97074, GermanyMore by Gudrun Reichenauer
- Gennady Y. Gor*Gennady Y. Gor*Email: [email protected]Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, New Jersey 07102, United StatesMore by Gennady Y. Gor
Abstract

Gas adsorption in zeolites leads to adsorption-induced deformation, which can significantly affect the adsorption and diffusive properties of the system. In this study, we conducted both experimental investigations and molecular simulations to understand the deformation of zeolites 13X and 4A during carbon dioxide adsorption at 273 K. To measure the sample’s adsorption isotherm and strain simultaneously, we used a commercial sorption instrument with a custom-made sample holder equipped with a dilatometer. Our experimental data showed that while the zeolites 13X and 4A exhibited similar adsorption isotherms, their strain isotherms differed significantly. To gain more insight into the adsorption process and adsorption-induced deformation of these zeolites, we employed coupled Monte Carlo and molecular dynamics simulations with atomistically detailed models of the frameworks. Our modeling results were consistent with the experimental data and helped us identify the reasons behind the different deformation behaviors of the considered structures. Our study also revealed the sensitivity of the strain isotherm of zeolites to pore size and other structural and energetic features, suggesting that measuring adsorption-induced deformation could serve as a complementary method for material characterization and provide guidelines for related technical applications.
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