TY  - JOUR
VL  - 355
Y1  - 2024/01/01/
A1  - Cao, S
A1  - Cao, J
A1  - Zhu, H
A1  - Huang, Y
A1  - Jin, B
A1  - Materazzi, M
AV  - public
KW  - Waste incineration
KW  -  Gas cleaning
KW  -  Calcined Mg-Al
KW  -  HCl removal
KW  -  Adsorption kinetic
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
JF  - Fuel
SN  - 0016-2361
N2  - To achieve carbon neutrality, it is essential to remove HCl resulting from the extensive use of alternative fuel feedstock in thermochemical plants. In this work, the HCl removal performance of modified calcined Mg-Al hydrotalcite (Mg-Al-CO3) on gaseous stream was investigated. The layered structure of Mg-Al-CO3 intercalated with CO32? was successfully prepared using the coprecipitation method with a molar ratio of Mg/Al equal to 3.1. The optimal performance of Mg-Al-CO3 for HCl removal was observed at 300 °C, and the breakthrough chlorine capacity was 102.7 mg g?1. Among calcined Mg-Al samples, only Mg-Al-400 exhibited better HCl removal performance than Mg-Al-CO3. The specific surface area of Mg-Al-400 was 183.73 m2 g?1, which was 2.8 times greater than that of Mg-Al-CO3. The average HCl removal rate was 90.11 % within the first 120 min, which was 1.12 times higher than that of Mg-Al-CO3. Moreover, the breakthrough chlorine capacity of Mg-Al-400 was increased by 16.9 %, reaching 120.1 mg g?1. Two reaction paths were identified for Mg-Al-400, first Mg2+ reacts with Cl? to generate MgCl2, and then Cl? acted as a new interlayer anion of hydrotalcite. According to the results of adsorption kinetics, the pseudo-second-order and the Bangham model were found to fit well with the HCl removal process of Mg-Al-400.
TI  - Removal of HCl from gases using modified calcined Mg-Al-CO3 hydrotalcite: Performance, mechanism, and adsorption kinetics
PB  - Elsevier BV
UR  - https://doi.org/10.1016/j.fuel.2023.129445
ID  - discovery10179516
ER  -