Abstract
Potassium carbonate sesquihydrate has previously been identified as a promising material for thermochemical energy storage. The hydration and cyclic behavior have been extensively studied in the literature, but detailed investigation into the different processes occurring during dehydration is lacking. In this work, a systematic investigation into the different dehydration steps is conducted. It is found that at higher temperatures, dehydration of pristine material occurs as a single process since water removal from the pristine crystals is difficult. After a single cycle, due to morphological changes, dehydration now occurs as two processes, starting at lower temperatures. The morphological changes open new pathways for water removal at the newly generated edges, corners, and steps of the crystal surface. The observations from this work may contribute to material design as they elucidate the relation between material structure and behavior.
| Original language | English |
|---|---|
| Pages (from-to) | 2493-2504 |
| Number of pages | 12 |
| Journal | Crystal Growth and Design |
| Volume | 24 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 20 Mar 2024 |
Funding
The authors thank Hans Dalderop and Max Beving for their support. Anders Kaestner from the Paul Scherrer Institute (PSI) in Switzerland is gratefully acknowledged for providing the opportunity for neutron imaging at the ICON beamline. This publication is part of the Mat4Heat project with project number 739.017.014 of the research program Mat4Sus which is financed by the Dutch Research Council (NWO). This publication is part of the Mat4Heat project with project number 739.017.014 of the research program Mat4Sus which is financed by the Dutch Research Council (NWO).
| Funders | Funder number |
|---|---|
| Nederlandse Organisatie voor Wetenschappelijk Onderzoek |