Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.apenergy.2015.10.126
Title (Primary) Assessment of adsorbate density models for numerical simulations of zeolite-based heat storage applications
Author Lehmann, C.; Beckert, S.; Gläser, R.; Kolditz, O. ORCID logo ; Nagel, T.
Source Titel Applied Energy
Year 2017
Department ENVINF
Volume 185
Issue Part 2
Page From 1965
Page To 1970
Language englisch
Keywords Heat storage; Zeolite; Adsorption; Dubinin–Polanyi; Porous media; OpenGeoSys
UFZ wide themes RU5;
Abstract

The study of water sorption in microporous materials is of increasing interest, particularly in the context of heat storage applications. The potential-theory of micropore volume filling pioneered by Polanyi and Dubinin is a useful tool for the description of adsorption equilibria. Based on one single characteristic curve, the system can be extensively characterised in terms of isotherms, isobars, isosteres, enthalpies etc. However, the mathematical description of the adsorbate density’s temperature dependence has a significant impact especially on the estimation of the energetically relevant adsorption enthalpies. Here, we evaluate and compare different models existing in the literature and elucidate those leading to realistic predictions of adsorption enthalpies. This is an important prerequisite for accurate simulations of heat and mass transport ranging from the laboratory scale to the reactor level of the heat store.

Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=16982
Lehmann, C., Beckert, S., Gläser, R., Kolditz, O., Nagel, T. (2017):
Assessment of adsorbate density models for numerical simulations of zeolite-based heat storage applications
Appl. Energy 185 (Part 2), 1965 - 1970 10.1016/j.apenergy.2015.10.126