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Remove elemental mercury from simulated flue gas by flower-like MoS2 modified with nanoparticles MnO2.
- Source :
-
Chemical Engineering Journal . May2021, Vol. 412, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- [Display omitted] • Different proportions of MoS 2 /MnO 2 adsorbents were synthesized. • Mm-30 adsorbents show great removal efficiency for mercury. • Mm-30 have a higher specific surface area than pure MoS 2. • The adsorption of Hg on Mm-30 follows the M−K mechanism. • Mm-30 adsorbent has good resistance to SO 2 under the condition of 400 ppm S+ N 2. In this work, MoS 2 /MnO 2 synthesized by hydrothermal methods was employed to remove Hg0 in flue gas. Benefited from the growth of MnO 2 on the surface of MoS 2 , the specific surface area of the Mm adsorbent has increased. Compared with pure MoS 2 , specific surface area of Mm-30 has increased by 26.0287 m2/g. The MoS 2 modified with 30 w.t. % MnO 2 revealed higher mercury removal performance at 120 °C, which reached 93%. The oxidation of mercury over Mm-30 is proposed to follow Mars-van Krevelen mechanism, whereby the lattice oxygen in the adsorbent is consumed. In presence of NO, HCl, O 2 and SO 2 , the effect of different concentrations on mercury oxidation is observed. Mm-30 adsorbent reveals stable mercury removal performance in the presence of NO and HCl, while it also exhibited good sulfur resistance under the condition of 400 ppm SO 2 + N 2. This phenomenon indicates that the adsorbent can be applied in power plants with medium concentrations of SO 2 , which facilitated the application of Mm-30 as a potential mercury removal adsorbent for power plants. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FLUE gases
*MERCURY
*MERCURY oxidation
*SURFACE area
*NANOPARTICLES
*POWER plants
Subjects
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 412
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 149415515
- Full Text :
- https://doi.org/10.1016/j.cej.2021.128588