Synthesis, Characterization, and High-Temperature HCl Capture Capacity of Different Proportions of Potassium Fluoride-Doped CaMgAl Layered Double Hydroxides

In this work, potassium fluoride-doped Ca–Mg–Al layered double hydroxides (CaMgAl-LDHs) were synthesized by a coprecipitation method, after which they were further used as strong adsorbents for HCl gas adsorption in a quartz reactor at high temperature. The physiochemical properties of the as-prepar...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:ACS omega 2019-11, Vol.4 (19), p.18159-18166
Hauptverfasser: Wu, Wei, Wu, Yuanfeng, Jin, Baosheng, Gu, Qinyang
Format: Artikel
Sprache:eng
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:In this work, potassium fluoride-doped Ca–Mg–Al layered double hydroxides (CaMgAl-LDHs) were synthesized by a coprecipitation method, after which they were further used as strong adsorbents for HCl gas adsorption in a quartz reactor at high temperature. The physiochemical properties of the as-prepared KF/CaMgAl-LDHs and CaMgAl-LDHs were investigated by X-ray diffraction, thermogravimetric, scanning electron microscopy, energy-dispersive system, and Brunauer–Emmett–Teller. The HCl adsorption test showed that 25 wt % KF loading of the KF/CaMgAl-LDOs was the optimal adsorbent for HCl removal. The highest adsorption capacity of the KF/CaMgAl-LDH adsorbent was achieved with 0.2968 g at 600 °C, 500 ppm HCl concentration, and 0.5 g adsorbent. Furthermore, the microstructure of the adsorbents after the reaction revealed that the adsorbents were encapsulated by dense chloride. The adsorption process was mainly dominated by chemical adsorption, strong acid–base properties, specific surface area, and mesopore number.
ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.9b02069