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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received December 11, 2010
Accepted June 10, 2011

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Enhancement mechanism of SO2 removal with calcium hydroxide in the presence of NO2

Jihui Gao^† Guoqing Chen Xiaolin Fu¹ Yijun Yin Shaohua Wu Yukun Qin

School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, Heilongjiang Province, P. R. China ¹ShanDong Electric Power Engineering Consulting Institute Corp., Ltd. (SDEPCI), 106, Minziqian Road, Jinan 250013, Shandong Province, P. R. China

gaojh@hit.edu.cn

Korean Journal of Chemical Engineering, February 2012, 29(2), 263-269(7), 10.1007/s11814-011-0157-7

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Abstract

The enhancement mechanism of SO2 removal by the presence of NO2 under low temperature and humid conditions was studied in a fixed bed reactor system. The presence of NO2 in the flue gas can enhance SO2 removal. The interaction between SO2 and NO2 in gas phase could not explain the effect of NO2 on SO2 removal under lowtemperature and humid conditions. When Ca(NO3)2 and Ca(NO2)2 as additive were added on the surface of sorbent, the desulfurization activity of sorbent decreased. However, the sorbent pretreated by NO2 for a moment has higher SO2 removal. The oxidization of SO32^(-) to SO42^(-) and the evolution of sorbent surface structure in the presence of NO2 can explain the enhancement of SO2 removal by the presence of NO2. HSO3^(-) and SO3^(-) reacted with NO2 to form sulfate, which can accelerate the hydrolysis of SO2. The reaction between NO2 and Ca(OH)2 can make the unreacted sorbet under the SO2 removal product exposed to the reactant gas.

Keywords

SO2 and NO2 Desulfurization Denitrification Flue Gas Calcium Hydroxide

References

Zhang H, Tong HL, Wang SJ, Zhuo YQ, Chen CH, Xu XC, Ind. Eng. Chem. Res., 45(18), 6099 (2006)
Chu H, Chien TW, Li SY, Sci. Total Environ., 275, 127 (2001)
Zhao GB, Garikipati SVB, Hu XD, Argyle MD, Radosz M, AIChE J., 51(6), 1800 (2005)
Wang ZH, Zhou JH, Zhu YQ, Wen ZC, Liu JZ, Cen K, Fuel Process. Technol., 88(8), 817 (2007)
Lyon RK, Cole JA, Kramlich JC, Chen SL, Combust.Flame., 81, 30 (1990)
Chu P, Rochelle GT, JAPCA., 39, 175 (1989)
Lee KT, Bhatia S, Mohamed AR, Chem. Eng. Sci., 60(12), 3419 (2005)
Ishizuka T, Kabashima H, Yamaguchi T, Tanabe K, Hattori H, Environ. Sci. Technol., 34, 2799 (2000)
Tsuchiai H, Ishizuka T, Nakamura H, Ueno T, Hattori H, Ind. Eng. Chem. Res., 35(3), 851 (1996)
Odowd WJ, Markussen JM, Pennline HW, Resnik KP, Ind. Eng. Chem. Res., 33(11), 2749 (1994)
Bausach M, Pera-Titus M, Fite C, Cunill F, Izquierdo JF, Tjero J, Iborra M, Ind. Eng. Chem. Res., 44, 9094 (2004)
Liu CF, Shih SM, Ind. Eng. Chem. Res., 45(26), 8765 (2006)
Li Y, Loh BC, Matsushima N, Nishioka M, Sadakata M, Energy Fuels, 16(1), 155 (2002)
Chen GQ, Gao JH, Wang SA, Fu XL, Xu LL, Qin YK, Ind. Eng. Chem. Res., 49(3), 1450 (2010)
Gao JH, Chen GQ, Liu JX, Fu XL, Gao JM, Du Q, Qin YK, Energy Fuels., 24, 5454 (2010)
Siddiqi MA, Petersen J, Lucas K, Ind. Eng. Chem. Res., 42(7), 1406 (2003)
Ho CS, Shih SM, Can. J. Chem. Eng., 71(6), 934 (1993)
Yung MM, Holmgreen EM, Ozkan US, J. Catal., 247(2), 356 (2007)
Dahlan I, Lee KT, Kamaruddin AH, Mohamed AR, J. Hazard. Mater., 166(2-3), 1556 (2009)