Characterization of Novel Sorbents for Mercury Removal at Elevated Temperature

Han Wen Cheng; Ching Tsung Yu

doi:10.4028/www.scientific.net/KEM.656-657.23

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 656-657Characterization of Novel Sorbents for Mercury...

Characterization of Novel Sorbents for Mercury Removal at Elevated Temperature

Abstract:

The novel carbonate sorbents of Mg–Al–CO₃ and (Mg_3−x, Cu_x)–Al–CO₃, were synthesized by co-precipitation method with individual nitrate salt of metal ions under alkaline conditions. The synthetic sorbent was characterized by analysis techniques such as BET surface area analysis, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Elemental mercury capture experiments were carried out in a fixed-bed reactor including Hg permeation source, furnace, and Hg analyzer, which was conducted at temperature ranging from 30 to 300 ^oC. The major results showed that the surface area of material was significantly increased via incorporating Cu²⁺ into Mg–Al–CO₃, accordingly enhancing Hg retention capacity of sorbents. SEM imagines displayed the layer appearance of Mg/Al and Mg/Cu/Al sorbents. Crystalline analysis indicated lamella structure accompanied with metal oxides within materials. Mercury removal tests demonstrated that the breakthrough time increased with temperature by adding transition metals to Mg–Al–CO₃ as (Mg_3−x, Cu_x)–Al–CO₃. Hg uptake by the (Mg_3−x, Cu_x)–Al–CO₃ sorbent rapidly increased with elevated temperature up to 200 ^oC and reached the maximum capacity of 12.93 μg/g, and then gradually decreased after 300 ^oC. Surface area and unique properties of transition metals are the reason toward improving Hg capture sorbent. These results represent the feasibility of using such Hg sorbents for elemental mercury removal under elevated temperature conditions, and the detail mechanism is needed to be further studied.

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Key Engineering Materials (Volumes 656-657)

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23-27

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https://doi.org/10.4028/www.scientific.net/KEM.656-657.23

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July 2015

Authors:

Han Wen Cheng, Ching Tsung Yu*

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Hg Removal, Lamella Carbonate Sorbent

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References

[1] J.D. Kilgroe, C.B. Sedman, R.K. Srivastava, J.V. Ryan, C.W. Lee, S.A. Thorneloe, Control of mercury emissions from coal-fired electric utility boilers: Interim report including errata Dated 3-21-02, EPA-600/R-01-109, USEPA, National Risk Management Research Laboratory, Research Triangle Park, NC (2002).

Google Scholar

[2] J.H. Pavlish, E.A. Sondreal, M.D. Mann, E.S. Olson, K.C. Galbreath, D.L. Laudal, S.A. Benson, Status review of mercury control options for coal-ﬁred power plants, Fuel Process. Technol. 82 (2003) 89-165.

DOI: 10.1016/s0378-3820(03)00059-6

Google Scholar

[3] E.J. Granite, H.W. Pennline, R.A. Hargis, Novel sorbents for mercury removal from flue gas, Ind. Eng. Chem. Res., 39 (2000) 1020-1029.

DOI: 10.1021/ie990758v

Google Scholar

[4] R.D. Vidic, Siler D.P. Vapor-phase elemental mercury adsorption by activated carbon impregnated with chloride and chelating agents. Carbon, 39 (2001) 3-14.

DOI: 10.1016/s0008-6223(00)00081-6

Google Scholar

[5] X. Li, Z. Liu, J. Kim, J. -Y. Lee, Heterogeneous catalytic reaction of elemental mercury vapor over cupric chloride for mercury emissions control, Applied Catalysis B: Environmental, vol. 132–133 (2013) 401-407.

DOI: 10.1016/j.apcatb.2012.11.031

Google Scholar

[6] Y. Zhao, M.D. Mann, J.H. Pavlish, B.A.F. Mibeck, G.E. Dunham, E.S. Olson, Application of gold catalyst for mercury oxidation by chlorine, Environ. Sci. Technol., 40 (2006) 1603-1608.

DOI: 10.1021/es050165d

Google Scholar

[7] S. Poulston, E.J. Granite, H.W. Pennline, C.R. Myers, D.P. Stanko, H. Hamilton et al., Metal sorbents for high temperature mercury capture from fuel gas, Fuel, 86 (2007) 2201-2203.

DOI: 10.1016/j.fuel.2007.05.015

Google Scholar

[8] G. Alptekin, J. Lind, R. Amalfitano, R. Copeland, Sorbents for mercury removal from coal-derived synthesis gas, 29th International technical conference on coal utilization and fuel systems, TDA Research, Inc., Clearwater, FL (2004).

Google Scholar

[9] A. Yamaguchi, H. Akiho, S. Ito, Mercury oxidation by copper oxides in combustion flue gases, Powder Technol., 180 (2008) 222-226.

DOI: 10.1016/j.powtec.2007.03.030

Google Scholar

[10] A.A. Presto, E.J. Granite, Survey of catalysts for oxidation of mercury in flue gas, Environ. Sci. Technol., 40 (2006) 5601-5609.

DOI: 10.1021/es060504i

Google Scholar