Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

doi:10.1016/j.cjche.2016.04.005

›› 2016, Vol. 24 ›› Issue (8): 1104-1111.DOI: 10.1016/j.cjche.2016.04.005

• Energy, Resources and Environmental Technology • Previous Articles Next Articles

Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

Jie Wang^1,2, Wenqi Zhong^1,2

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 Centre for Simulation and Modelling of Particulate Systems, Southeast University-Monash University Joint Research School, Suzhou 215123, China

Received:2015-12-10 Revised:2016-01-27 Online:2016-09-21 Published:2016-08-28
Supported by:
Supported by the National Science Foundation of China for Distinguished Young Scholars (No. 51325601), Major Program of National Science Foundation of China (No. 51390492) and Joint Funds of National Science Foundation of China (No. U1560205).

Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

Jie Wang^1,2, Wenqi Zhong^1,2

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 Centre for Simulation and Modelling of Particulate Systems, Southeast University-Monash University Joint Research School, Suzhou 215123, China

通讯作者: Wenqi Zhong
基金资助:
Supported by the National Science Foundation of China for Distinguished Young Scholars (No. 51325601), Major Program of National Science Foundation of China (No. 51390492) and Joint Funds of National Science Foundation of China (No. U1560205).

Abstract

Abstract: Experiments on simultaneous absorption of SO₂ and NO_X from sintering flue gas via a composite absorbent NaClO₂/NaClO were carried out. The effects of various operating parameters such as NaClO₂ concentration (m_s), NaClO concentration (m_p), molar ratio of NaClO₂/NaClO (M), solution temperature (T_R), initial solution pH, gas flow (V_g) and inlet concentration of SO₂ (C_S) and NO (C_N) on the removal efficiencies of SO₂ and NO were discussed. The optimal experimental conditions were determined to be initial solution pH=6, T_R=55℃ and M=1.3 under which the average efficiencies of desulfurization and denitrification could reach 99.7% and 90.8%, respectively. Moreover, according to the analysis of reaction products, it was found that adding NaClO to NaClO₂ aqueous solution is favorable for the generation of ClO₂ and Cl₂ which have significant effect on desulfurization and denitrification. Finally, engineering experiments were performed and obtained good results demonstrating that this method is practicable and promising.

Key words: Simultaneous desulfurization and, denitrification, Sintering flue gas, Composite absorbent

摘要： Experiments on simultaneous absorption of SO₂ and NO_X from sintering flue gas via a composite absorbent NaClO₂/NaClO were carried out. The effects of various operating parameters such as NaClO₂ concentration (m_s), NaClO concentration (m_p), molar ratio of NaClO₂/NaClO (M), solution temperature (T_R), initial solution pH, gas flow (V_g) and inlet concentration of SO₂ (C_S) and NO (C_N) on the removal efficiencies of SO₂ and NO were discussed. The optimal experimental conditions were determined to be initial solution pH=6, T_R=55℃ and M=1.3 under which the average efficiencies of desulfurization and denitrification could reach 99.7% and 90.8%, respectively. Moreover, according to the analysis of reaction products, it was found that adding NaClO to NaClO₂ aqueous solution is favorable for the generation of ClO₂ and Cl₂ which have significant effect on desulfurization and denitrification. Finally, engineering experiments were performed and obtained good results demonstrating that this method is practicable and promising.

关键词: Simultaneous desulfurization and, denitrification, Sintering flue gas, Composite absorbent

Jie Wang, Wenqi Zhong. Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent[J]. , 2016, 24(8): 1104-1111.

References

[1] Y. Li, W.Q. Zhong, J. Ju, Experiment on simultaneous absorption of NO and SO₂ from sintering flue gas by oxidizing agents of KMnO₄/NaClO, Int. J. Chem. React. Eng. 12(1) (2014) 1-9.
[2] D.G. Streets, S.T. Waldhoff, Present and future emissions of air pollutants in China:SO₂, NO_X and CO, Atmos. Environ. 34(3) (2000) 363-374.
[3] F.J. Gutierrez Ortiz, F. Vidal, P. Ollero, L. Salvador, V. Cortes, Pilot-plant technical assessment of wet flue gas desulfurization using limestone, Ind. Eng. Chem. Res. 45(4) (2006) 1466-1477.
[4] G. Qi, R.T. Yang, R. Chang, MnOX-CeO₂ mixed oxides prepared by co-precipitation for selective catalytic reduction of NO with NH₃ at low temperatures, Appl. Catal. B Environ. 51(2) (2004) 93-106.
[5] M.T. Javed, N. Irfan, B.M. Gibbs, Control of combustion-generated nitrogen oxides by selective non-catalytic reduction, J. Environ. Manag. 83(3) (2007) 251-289.
[6] S.W. Bae, S.A. Roh, S.D. Kim, NO removal by reducing agents and additives in the selective non-catalytic reduction (SNCR) process, Chemosphere 65(1) (2006) 170-175.
[7] Y. Zhao, T. Guo, Z. Chen, Y. Du, Simultaneous removal of SO₂ and NO using M/NaClO₂ complex absorbent, Chem. Eng. J. 160(1) (2010) 42-47.
[8] D.S. Jin, B.R. Deshwal, Y.S. Park, H.K. Lee, Simultaneous removal of SO₂ and NO by wet scrubbing using aqueous chlorine dioxide solution, J. Hazard. Mater. 135(1-3) (2006) 412-417.
[9] H.K. Lee, B.R. Deshwal, K.S. Yoo, Simultaneous removal of SO₂ and NO by sodium chlorite solution in Wetted-Wall column, Korean J. Chem. Eng. 22(2) (2005) 208-213.
[10] Y.S. Mok, H.J. Lee, Removal of sulfur dioxide and nitrogen oxides by using ozone injection and absorption reduction technique, Fuel Process. Technol. 87(7) (2006) 591-597.
[11] Z. Wang, J. Zhou, Y. Zhu, Simultaneous removal of NO_X, SO₂ and Hg in nitrogen flow in a narrow reactor by ozone injection:experimental results, Fuel Process. Technol. 88(8) (2007) 817-823.
[12] H. Chu, T.W. Chien, S.Y. Li, Simultaneous absorption of SO₂ and NO from flue gas with KMnO₄/NaOH solutions, Sci. Total Environ. 275(1-3) (2001) 127-135.
[13] H. Chu, S.Y. Li, T.W. Chien, The absorption kinetics of NO from flue gas in a stirred tank reactor with KMnO₄/NaOH solutions, J. Environ. Sci. Health A 33(5) (1998) 801-827.
[14] C. Brogren, H.T. Karlsson, I. Bjerle, Absorption of NO in an alkaline solution of KMnO₄, Chem. Eng. Technol. 20(6) (1997) 396-402.
[15] Z. Wei, H. Niu, Y. Ji, Simultaneous removal of SO₂ and NO_X by microwave with potassium permanganate over zeolite, Fuel Process. Technol. 90(2) (2009) 324-329.
[16] D. Thomas, S. Colle, J. Vanderschuren, Kinetics of SO₂ absorption into fairly concentrated sulphuric acid solutions containing hydrogen peroxide, Chem. Eng. Process. 42(6) (2003) 487-494.
[17] S. Colle, J. Vanderschuren, D. Thomas, Pilot-scale validation of the kinetics of SO₂ absorption into sulphuric acid solutions containing hydrogen peroxide, Chem. Eng. Process. 43(11) (2004) 1397-1402.
[18] S. Colle, J. Vanderschuren, D. Thomas, Simulation of SO₂ absorption into sulfuric acid solutions containing hydrogen peroxide in the fast and moderately fast kinetic regimes, Chem. Eng. Process. 60(22) (2005) 6472-6479.
[19] E. Sada, H. Kumazawa, I. Kudo, T. Kondo, Absorption of NO in aqueous mixed solutions of NaClO₂ of and NaOH, Chem. Eng. Sci. 33(3) (1978) 315-318.
[20] E. Sada, H. Kumazawa, Y. Yamanaka, I. Kudo, T. Kondo, And nitric oxide in aqueous mixed solutions of sodium chlorite and sodium hydroxide, J. Chem. Eng. Jpn 11(4) (1978) 276-282.
[21] E. Sada, H. Kumazawa, M.A. Butt, Single and simultaneous absorptions of lean SO₂ and NO₂ into aqueous slurries of Ca(OH)2 or Mg(OH)2 particles, J. Chem. Eng. Jpn 12(2) (1979) 111-117.
[22] T.W. Chien, H. Chu, H.T. Hsueh, Kinetic study on absorption of SO₂ and NO_X with acidic NaClO₂ solutions using the spraying column, J. Environ. Eng. 129(11) (2003) 967-974.
[23] H. Chu, T.W. Chien, B.W. Twu, The absorption kinetics of NO in NaClO₂/NaOH solutions, J. Hazard. Mater. 84(2-3) (2001) 241-252.
[24] T.W. Chien, H. Chu, Removal of SO₂ and NO from flue gas by wet scrubbing using an aqueous NaClO₂ solution, J. Hazard. Mater. 80(1-3) (2000) 43-57.
[25] C. Yang, H. Shaw, H. Perlmutter, Absorption of NO promoted by strong oxidizing agents:1. Inorganic oxychlorites in nitric acid, Chem. Eng. Commun. 143(1) (1996) 23-38.
[26] C. Yang, H. Shaw, Aqueous absorption of nitric oxide induced by sodium chlorite oxidation in the presence of sulfur dioxide, Environ. Prog. 17(2) (1998) 80-85.
[27] B.R. Deshwal, S.H. Lee, J.H. Jung, B.H. Shon, H.K. Lee, Study on the removal of NOx from simulated flue gas using acidic NaClO₂ solution, J. Environ. Sci. 20(1) (2008) 33-38.
[28] L. Chen, C. Hsu, C. Yang, Oxidation and absorption of nitric oxide in a packed tower with sodium hypochlorite aqueous solutions, Environ. Prog. 24(3) (2005) 279-288.
[29] L. Chen, J.W. Lin, C.L. Yang, Absorption of NO₂ in a packed tower with Na₂SO₃ aqueous solution, Environ. Prog. 21(4) (2002) 225-230.
[30] B.R. Deshwal, H. Jo, H. Lee, Reaction kinetics of decomposition of acidic sodium chlorite, Can. J. Chem. Eng. 82(3) (2004) 619-623.
[31] T.W. Chien, H. Chu, H.T. Hsueh, Spray scrubbing of the nitrogen oxides into NaClO₂ solution under acidic conditions, J. Environ. Sci. Health A 36(4) (2001) 403-414.
[32] B. Kormanyos, I. Nagypal, G. Peintler, A. Horvath, Effect of chloride ion on the kinetics and mechanism of the reaction between chlorite ion and hypochlorous acid, Inorg. Chem. 47(17) (2008) 7914-7920.
[33] T. Lehtimaa, V. Tarvo, G. Mortha, S. Kuitunen, T. Vuorinen, Reactions and kinetics of Cl (Ⅲ) decomposition, Ind. Eng. Chem. Res. 47(15) (2008) 5284-5290.

Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

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