Effecting pattern study of SO2 on Hg0 removal over α-MnO2 in-situ supported magnetic composite

Yao，Ting1,2,3; Long，Jisheng1; Duan，Yufeng2; Gupta，Rajender3; Xu，Zhenghe3,4

2023-05-15

10.1016/j.jhazmat.2023.131088

JOURNAL OF HAZARDOUS MATERIALS   Impact Factor & Quartile

0304-3894

1873-3336

α-MnO was in-situ supported onto silica coated magnetite nanoparticles (MagS-Mn) to study the adsorption and oxidation of Hg as well as the effecting patterns of SO and O on Hg removal. MagS-Mn showed Hg removal capacity of 1122.6 μg/g at 150 °C with the presence of SO. Hg adsorption and oxidation efficiencies were 2.4% and 90.6%, respectively. Hg removal capability deteriorated at elevated temperatures. Surface oxygen and manganese chemistry analysis indicated that SO inhibited the Hg removal through consumption of adsorbed oxygen and reduction of high valence manganese. This inhibiting effect was observed to be counteracted by O at lower temperatures. O tended to compete with SO for active sites and further create additional adsorbed oxygen sites for Hg surface reaction via surface dissociative adsorption rather than replenish the active sites consumed by SO. The high valence manganese was also preserved by O which was essential to Hg oxidation. The intervention of O in the inhibition of SO on Hg removal was weakened at temperatures higher than 250 °C. Aa a result, Hg tends to be catalytic oxidized in the condition of low reaction temperatures and with the presence of O over α-MnO oriented composites.

Catalytic oxidation Mercury removal SO2 resistance α-MnO2

SCI

English

Others

National Key R & D Program of China[2020YFC1910100] ; National Natural Science Foundation of China[51576044] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province[KYLX16_0201]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000948943200001

ELSEVIER

ENGINEERING

2-s2.0-85149241040

Scopus

1.Shanghai SUS Environment Co.,LTD,Shanghai,201703,China
2.Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing,210096,China
3.Department of Chemical and Materials Engineering,University of Alberta,Edmonton,T6G 1H9,Canada
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yao，Ting,Long，Jisheng,Duan，Yufeng,et al. Effecting pattern study of SO2 on Hg0 removal over α-MnO2 in-situ supported magnetic composite[J]. JOURNAL OF HAZARDOUS MATERIALS,2023,450.

Yao，Ting,Long，Jisheng,Duan，Yufeng,Gupta，Rajender,&Xu，Zhenghe.(2023).Effecting pattern study of SO2 on Hg0 removal over α-MnO2 in-situ supported magnetic composite.JOURNAL OF HAZARDOUS MATERIALS,450.

Yao，Ting,et al."Effecting pattern study of SO2 on Hg0 removal over α-MnO2 in-situ supported magnetic composite".JOURNAL OF HAZARDOUS MATERIALS 450(2023).