Regenerable Sorbent with a High Capacity for Elemental
Mercury Removal and Recycling from the Simulated Flue Gas at a Low
Temperature
Zan Qu
Jiangkun Xie
Haomiao Xu
Wanmiao Chen
Naiqiang Yan
10.1021/acs.energyfuels.5b00868.s001
https://acs.figshare.com/articles/journal_contribution/Regenerable_Sorbent_with_a_High_Capacity_for_Elemental_Mercury_Removal_and_Recycling_from_the_Simulated_Flue_Gas_at_a_Low_Temperature/2054724
To
remove and recycle elemental mercury from flue gas, a serial of Ce–Mn
binary metal oxides was prepared and tested as the regenerable sorbents
for mercury capture. Ce<sub>0.5</sub>Mn<sub>0.5</sub>O<sub><i>y</i></sub> showed the best performance at 100 °C (about
5.6 mg g<sup>–1</sup> adsorption capacity), and Ce–Mn
binary metal oxides could adsorb more elemental mercury than MnO<sub><i>y</i></sub>. Furthermore, it was found that captured
mercury can be released from the sorbent in the form of elemental
mercury by heating to 350 °C. Meanwhile, the sorbent can be regenerated
and repeatedly used. Powder X-ray diffractometer (PXRD), transmission
electron microscopy (TEM), hydrogen temperature-programmed reduction
(H<sub>2</sub>-TPR), ammonia temperature-programmed desorption (NH<sub>3</sub>-TPD), X-ray photoelectron spectroscopy (XPS), and nitrogen
adsorption methods were employed to characterize the sorbents. A model
based on mercury temperature-programmed desorption (Hg-TPD) data was
built to calculate mercury desorption activation energy from the sorbent.
Additionally, the impacts of the temperature and flue gas components
on the adsorption capacity were investigated. NO had negligible impact
on mercury adsorption, while the presence of SO<sub>2</sub> slightly
inhibited the capability of sorbents for mercury capture. The results
indicated that Ce–Mn binary metal oxides are a promising sorbent
for the mercury removal and recycling from flue gas.
2015-12-17 10:15:11
Simulated Flue Gas
XPS
Elemental Mercury Removal
NH
flue gas
TEM
PXRD
metal oxides
Ce
mercury desorption activation energy
flue gas components
nitrogen adsorption methods
sorbent