Production of MgAl/layered double hydroxide microspheres and investigation of the volumetric heat transfer coefficient in spray drying
Layered Double Hydroxides (LDH) are synthetic materials nanostructured in two dimensions that present positively charged layers with interspersed anions for charge and structure balancing. Being recognized as a promising material for various applications, a complete exploration of its possible attra...
Gespeichert in:
Veröffentlicht in: | Heliyon 2024-04, Vol.10 (8), p.e29646-e29646, Article e29646 |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Layered Double Hydroxides (LDH) are synthetic materials nanostructured in two dimensions that present positively charged layers with interspersed anions for charge and structure balancing. Being recognized as a promising material for various applications, a complete exploration of its possible attractive properties and its synthesis process is essential. However, drying, a necessary step in the process, is still little studied. This work aimed to produce MgAl–CO3/LDH microspheres and calculate the volumetric heat coefficient in spray drying, evaluating the drying air inlet temperature and the concentration of the feed paste in the dryer. LDH synthesis was carried out using the coprecipitation method, maintaining a 2:1 Mg/Al ratio. The infrared spectra presented the bands characteristic of the hydrotalcite-type material. Through XRD, it was possible to observe that the variation in drying air temperature and feed paste concentration produced LDHs with structural differences. The results obtained for the basal spacing ranged from 7.685 to 7.705 Å. Scanning electron microscopy images confirm the production of LDH microspheres, showing variation in the size of the agglomerates with changes in the feed paste concentration. The volumetric heat transfer coefficient values ranged from 4.31 to 5.36 W m−3 K−1, with only the air inlet temperature significantly influencing the process under the conditions studied.
•Production of MgAl–CO3/LDH microspheres.•Influence of the drying process on the synthesis of MgAl–CO3/LDH were investigated.•Synthesized materials were characterized by XRD, FT-IR and SEM.•Drying manipulation can cause alteration in the material behavior for specific application.•Volumetric heat transfer coefficient of spray dryer was evaluated. |
---|---|
ISSN: | 2405-8440 2405-8440 |
DOI: | 10.1016/j.heliyon.2024.e29646 |