Graphene enhanced Mn-Ce binary metal oxides for catalytic oxidation and adsorption of elemental mercury from coal-fired flue gas

Highly dispersed Mn–Ce binary metal oxides supported on carbon nanofibers (MnOx–CeO2/CNFs(OX)) were prepared for Hg0 removal from coal-fired flue gas. The loading value of the well-dispersed MnOx–CeO2 was much higher than those of many other reported supports, indicating that more active sites were loaded on the carbon nanofibers. In the present study, 30 wt % metal oxides (15 wt % MnOx and 15 wt % CeO2) were successfully deposited on the carbon nanofibers, and the sorbent yielded the highest Hg0 removal efficiency (>90%) within 120–220 °C under a N2/O2 atmosphere. An increase in the amount of highly dispersed metal oxides provided abundant active species for efficient Hg0 removal, such as active oxygen species and Mn4+ cations. Meanwhile, the carbon nanofiber framework provides the pathway for charge transfer during the heterogeneous Hg0 capture reaction processes. Under a N2+6%O2 atmosphere, a majority of Hg0 was removed via chemisorption reactions. The effects of flue gas composition were also investigated. O2 replenished the active oxygen species on the surface and thus greatly promoted the Hg0 removal efficiency. SO2 had an inhibitory effect on Hg0 removal, but NO facilitated Hg0 capture performance. Overall, carbon nanofibers seems to be a good candidate for the support and MnOx–CeO2/CNFs(OX) may be promising for Hg0 removal from coal-fired flue gas.

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Mn–Cu Binary Metal Oxides with Molecular-Scale Homogeneity for Hg0 Removal from Coal-Fired Flue Gas

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.9b04005 ◽

2019 ◽

Vol 58 (41) ◽

pp. 19292-19301 ◽

Cited By ~ 2

Author(s):

Ru Yang ◽

Congli Mei ◽

Xiushan Wu ◽

Xianfeng Yu ◽

Zhenzhen Shi

Keyword(s):

Metal Oxides ◽

Flue Gas ◽

Binary Metal ◽

Molecular Scale ◽

Binary Metal Oxides

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Elemental Mercury Capture from Syngas by Novel High-Temperature Sorbent Based on Pd–Ce Binary Metal Oxides

Industrial & Engineering Chemistry Research ◽

10.1021/ie504447j ◽

2015 ◽

Vol 54 (14) ◽

pp. 3678-3684 ◽

Cited By ~ 14

Author(s):

Wenhui Hou ◽

Jinsong Zhou ◽

Shulin You ◽

Xiang Gao ◽

Zhongyang Luo

Keyword(s):

High Temperature ◽

Metal Oxides ◽

Elemental Mercury ◽

Binary Metal ◽

Mercury Capture ◽

Binary Metal Oxides

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Core-shell nanostructure α-Fe2O3/SnO2 binary oxides for the catalytic oxidation and adsorption of elemental mercury from flue gas

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.105137 ◽

2021 ◽

Vol 9 (2) ◽

pp. 105137

Author(s):

Yongpeng Ma ◽

Tengfei Xu ◽

Ling Li ◽

Jiandong Wang ◽

Yu Li ◽

...

Keyword(s):

Catalytic Oxidation ◽

Flue Gas ◽

Elemental Mercury ◽

Core Shell ◽

Binary Oxides

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Polymorphic Phase Transitions in Nanocrystalline Binary Metal Oxides

Journal of the American Ceramic Society ◽

10.1111/jace.12527 ◽

2013 ◽

Vol 96 (9) ◽

pp. 3008-3008 ◽

Cited By ~ 3

Author(s):

Shantanu Sood ◽

Perena Gouma

Keyword(s):

Phase Transitions ◽

Metal Oxides ◽

Binary Metal ◽

Binary Metal Oxides

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Traditional salt-in-water electrolyte vs. water-in-salt electrolyte with binary metal oxide for symmetric supercapacitors: capacitive vs. faradaic

Dalton Transactions ◽

10.1039/d0dt01871f ◽

2020 ◽

Vol 49 (33) ◽

pp. 11743-11755 ◽

Cited By ~ 2

Author(s):

Manickam Minakshi Sundaram ◽

Dominique Appadoo

Keyword(s):

Renewable Energy ◽

Energy Storage ◽

Metal Oxides ◽

Electrochemical Energy Storage ◽

Sodium Ions ◽

Binary Metal ◽

Binary Metal Oxide ◽

Binary Metal Oxides ◽

Energy Storage Applications ◽

Renewable Energy Storage

The electrochemical energy storage of lithium and sodium ions from aqueous solutions in binary metal oxides is of great interest for renewable energy storage applications.

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