Experimental and theoretical analysis of element mercury adsorption on Fe3O4/Ag composites

Lu Dong; Jiangkun Xie; Guangping Fan; Yaji Huang; Jun Zhou; Qingke Sun; LiangWang; Zhengwen Guan; Di Jiang; Ye Wang

Korean Journal of Chemical Engineering, Vol.34, No.11, 2861-2869, November, 2017

DOI10.1007/s11814-017-0177-z Export Citation

Experimental and theoretical analysis of element mercury adsorption on Fe3O4/Ag composites

Lu Dong, Jiangkun Xie¹, Guangping Fan¹, Yaji Huang^†, Jun Zhou¹, Qingke Sun, LiangWang, Zhengwen Guan¹, Di Jiang¹, and Ye Wang¹

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
¹China Construction Power and Environment Engineering Co., Ltd., Nanjing 210008, China

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A novel magnetic nano-sorbent Fe3O4/Ag was synthesized and applied to capture the elemental mercury from the simulated flue gas. The morphology, components and crystal phase of the sorbents were characterized by transmission electron microscope (TEM), energy dispersive spectrometry (EDS) and X-ray diffraction (XRD), respectively. The mercury removal performance of the sorbents was investigated through the fixed-bed tests. The results indicated that silver was successfully loaded on the surface of Fe3O4 particles, which could significantly enhance the Hg0 removal performance of the sorbents. Flue gas components, including CO2, SO2, and NO, have little impact on the Hg0 removal performance of Fe3O4/Ag sorbents, while O2 has a slightly positive effect. The Hg0 removal efficiency decreased with the increasing of temperature, Hg0 inlet concentration and gas hourly space velocity. Only one broad mercury desorption peak at approximately 210 °C could be observed during the temperature-programmed desorption (TPD) process, which indicated that mercury species existing on the surface of Fe3O4/Ag sorbents might be elemental mercury instead of oxidized mercury. Furthermore, the reusability tests showed that the Fe3O4/Ag sorbents could be efficiently regenerated and reused. Finally, the theoretical analysis based on the DFT method showed that a weak chemisorption of Hg0 on Fe3O4 sorbents changed to a strong chemisorption when silver was loaded. The results of theoretical analysis conformed to the experiments results well.

Keywords:Hg0;Sorbent;Magnetic;Dmol3

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Liu YX, Zhang J, Pan JF, Energy Fuels, 28(3), 2135 (2014)
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[Referenced By]

[1] Schuster E, Water Air Soil Pollut., 56, 667 (1991)

[2] Park KS, Seo YC, Lee SJ, Lee JH, Powder Technol., 180(1-2), 151 (2008)

[3] Galbreath KC, Zygarlicke CJ, Fuel Process. Technol., 65, 289 (2000)

[4] Gao Y, Zhang Z, Wu J, Duan L, Umar A, Sun L, Guo Z, Wang Q, Environ. Sci. Technol., 47, 10813 (2013)

[5] Zhao S, Qu Z, Yan N, Li Z, Zhu W, Pan J, Xu J, Li M, Rsc Adv., 5, 30841 (2015)

[6] Padak B, Wilcox J, Carbon, 47, 2855 (2009)

[7] Miller SJ, Dunham GE, Olson ES, Brown TD, Fuel Process. Technol., 65, 343 (2000)

[8] Cao Y, Cui H, Pan WP, Anal J, Appl. Pyrol., 80, 319 (2007)

[9] Granite EJ, Myers CR, King WP, Stanko DC, Pennline HW, Ind. Eng. Chem. Res., 45(13), 4844 (2006)

[10] Luo G, Yao H, Xu M, Cui X, Chen W, Gupta R, Xu Z, Energy Fuels, 24, 419 (2009)

[11] Xu H, Qu Z, Huang W, Mei J, Chen W, Zhao S, Yan N, Colloids Surf. A: Physicochem. Eng. Asp., 476, 83 (2015)

[12] Dong J, Xu ZH, Kuznicki SM, Adv. Funct. Mater., 19(8), 1268 (2009)

[13] Dong J, Xu Z, Kuznicki SM, Environ. Sci. Technol., 43, 3266 (2009)

[14] Rungnim C, Meeprasert J, Kunaseth M, Junkaew A, Khamdahsag P, Khemthong P, Pimpha N, Namuangruk S, Chem. Eng. J., 274, 132 (2015)

[15] Kang YS, Risbud S, Rabolt JF, Stroeve P, Chem. Mater., 8, 2209 (1996)

[16] Zhang X, Jiang W, Gong X, Zhang Z, J. Alloy. Compd., 508, 400 (2010)

[17] Delley B, J. Chem. Phys., 113(18), 7756 (2000)

[18] Perdew JP, Burke L, Ernzerhof M, Phys. Rev. Lett., 77, 3865 (1996)

[19] Delley B, Phys. Rev. B, 66, 155125 (2002)

[20] Yang T, Wen XD, Li YW, Wang J, Jiao H, Surf. Sci., 603, 78 (2009)

[21] Su TM, Qin ZZ, Huang G, Ji HB, Jiang YX, Chen JH, Appl. Surf. Sci., 378, 270 (2016)

[22] Dementyev P, Dostert KH, Barcelo FI, O’Brien CP, Mirabella F, Schauermann S, Li X, Paier J, Sauer J, Freund HJ, Angew. Chem.-Int. Edit., 54, 13942 (2015)

[23] Yang T, Wen XD, Huo CF, Li YW, Wang J, Jiao H, J. Mol. Catal. A-Chem., 302(1-2), 129 (2009)

[24] Li X, Paier J, J. Phys. Chem., 2, 120 (2016)

[25] Nowakowski R, Pielaszek J, Dus R, Appl. Surf. Sci., 199(1-4), 40 (2002)

[26] Kong F, Qiu J, Liu H, Zhao R, Ai Z, J. Environ. Sci, 23, 699 (2011)

[27] Zhao L, Li C, Zhang X, Zeng G, Zhang J, Xie YE, Catal. Sci. Technol., 5, 3459 (2015)

[28] Long SJ, Scott DR, Thompson RJ, Anal. Chem., 45, 2227 (1973)

[29] Liu YX, Zhang J, Pan JF, Energy Fuels, 28(3), 2135 (2014)

[30] Zhao S, Qu Z, Yan N, Li Z, Zhu W, Pan J, Xu J, Li M, Rsc Adv., 5, 30841 (2015)

[31] Hou WH, Zhou JS, Yu CJ, You SL, Gao X, Luo ZY, Ind. Eng. Chem. Res., 53(23), 9909 (2014)

[32] Wang P, Hu S, Xiang J, Su S, Sun L, Cao F, Xiao X, Zhang A, P. Combust. Inst., 35, 2847 (2015)

[33] Guo P, Guo X, Zheng CG, Appl. Surf. Sci., 256(23), 6991 (2010)

[34] Guo P, Guo X, Zheng CG, Fuel, 90(5), 1840 (2011)

[35] Geng L, Han LN, Cen WL, Wang JC, Chang LP, Kong DJ, Feng G, Appl. Surf. Sci., 321, 30 (2014)