Abstract
Thermochemical heat storage systems encounter challenges such as agglomeration within the reactor bed,
which limits gas molecule movement and diminishes overall efficiency. This study proposes an approach
to mitigate this issue by producing millimeter-sized potassium carbonate (K2CO3) granules without
binders using the wet granulation technique. Through 10 cycles, initial hydration loading started at 0.19
molH2O/molK2CO3 in the first cycle and increased steadily to 1.42 molH2O/molK2CO3 by the 10th cycle.
During 6-hour hydration periods, the released heat from the granules significantly increased from 57 J/g
to 535 J/g after 10 cycles, attributed to changes in pore volume and granule structure throughout cycling.
Despite pore enlargement, the granules maintained structural integrity, highlighting their stability across
repeated cycles. This study underscores the potential of binder-free potassium carbonate granules to
enhance heat storage efficiency, providing valuable insights for optimizing thermochemical heat storage
systems, particularly in terms of scalability for mass production of these granules.
which limits gas molecule movement and diminishes overall efficiency. This study proposes an approach
to mitigate this issue by producing millimeter-sized potassium carbonate (K2CO3) granules without
binders using the wet granulation technique. Through 10 cycles, initial hydration loading started at 0.19
molH2O/molK2CO3 in the first cycle and increased steadily to 1.42 molH2O/molK2CO3 by the 10th cycle.
During 6-hour hydration periods, the released heat from the granules significantly increased from 57 J/g
to 535 J/g after 10 cycles, attributed to changes in pore volume and granule structure throughout cycling.
Despite pore enlargement, the granules maintained structural integrity, highlighting their stability across
repeated cycles. This study underscores the potential of binder-free potassium carbonate granules to
enhance heat storage efficiency, providing valuable insights for optimizing thermochemical heat storage
systems, particularly in terms of scalability for mass production of these granules.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 16th IEA ES TCP International Conference on Energy Storage (ENERSTOCK 2024) |
| Editors | Frédéric Kuznik |
| Place of Publication | Lyon |
| Pages | 49-53 |
| Number of pages | 5 |
| ISBN (Electronic) | 978-2-9595978-0-0 |
| Publication status | Published - 18 Sept 2024 |
Keywords
- Thermochemical energy storage
- Na2S
- Shuffled Complex Evolution