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http://dx.doi.org/10.5762/KAIS.2017.18.10.663

Improvement of DeNOx efficiency of SNCR Process with Chemical Additives in Urea Soution  

Yoo, Kyung Seun (Department of Environmental Engineering, Kwangwoon university)
Park, Sung Woo (Department of Environmental Engineering, Kwangwoon university)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.10, 2017 , pp. 663-668 More about this Journal
Abstract
Dye waste water generated in the dye industry is categorized as hazardous waste water that requires appropriate treatment. The pilot scale experimental trials were carried out using dye waste water as an effective additive for the selective non-catalytic reduction (SNCR) of NOx in combustion flue gases. The additives were waste liquor obtained from the dye industry and several purification steps were taken to make a standardized reagents. The dye waste water was shown to possess valuable SNCR qualities (at least 87% NOx reduction efficiency) considering its availability as a waste product, which has to be strictly treated, and have little effects on CO removal. The results indicated that the NO removal efficiency increased first and then decreased with increasing temperature within $750-1150^{\circ}C$. The maximum NO reduction efficiency was approximately 87% at the optimal reaction temperature. A more than 10% increase in NO reduction was achieved in the presence of 1000 ppm Na-additives (dye waste water) compared to that without additives. The Na-based additives have also a significant promoting effect on $N_2O$ reduction and within the SNCR temperature window.
Keywords
Additives; NO reduction; Reducing agent; SNCR; Temperature window;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 J. B. Lee, S. D. Kim, "Kinetics of NOx reduction by urea solution in a pilot-scale reactor", J. Chem. Eng. Japan, vol. 29, pp. 620-626, 1996. DOI: https://doi.org/10.1252/jcej.29.620   DOI
2 J. H. Kim, B. H. Kim, J. W. Park, S. M. Lee, "Reaction Characteristic by Injection of Promotors in Selective Non-Catalytic Reduction(SNCR)", Journal of Korea Society of Waste management, vol. 21, no. 6, pp. 523-533, 2004.
3 I. H. Jung, N. S. Roh, K. H. Kim, S. S. Kim, S. K. Lee, D. C. Kim, D. H. Shin, "Atomizing and DeNOx Behaviors of an Injector for the SNCR Reducing Agent", Journal of Korean Society of Environmental Engineers, vol. 23, no. 9, pp. 1431-1440, 2001.
4 S. M. Lee, K. N. Park, T. H. Kwak, J. W. Park, S. Makin, B. H. Kim, "The Improvement of Denitrofication by Using Sodium Salts in the SNCR Process", Korean Chem Eng, vol. 43, no. 2, pp. 324-329, 2005.
5 Gasnot, L, Dao, D.Q, Pauwels, J. F. 2012. Experimental and kinetic study of the effect of additives on the ammonia based SNCR process in low temperature conditions. Energy Fuels 26, 2, pp. 837-284. DOI: https://doi.org/10.1021/ef300310c   DOI
6 M. Yayyeb Javed, W. Nimmo, Asif Mahmood, Naseem Irfan, "Effect of oxygenated liquid additives on the urea based SNCR process", Journal of Environmental Management, vol. 90, 3, pp. 429-343, 5 2009. DOI: https://doi.org/10.1016/j.jenvman.2009.05.021   DOI
7 Sang Wook Bae, Seon Ah Roh, Sang Done Kim, "NO removal by reducing agents and additives in the selective non-catalytic reduction (SNCR) process", Chemosphere, vol. 65, pp. 170-175, 2006. DOI: https://doi.org/10.1016/j.chemosphere.2006.02.040   DOI
8 Vladimir M. Zamansky, Vitali V. Lissianski, Peter M. Maly, Loc Ho, Darwin Rusli, William C. Gardner, JR, "Reaction of Sodium Speies in the Promoted SNCR Process", Combustion and Flame, vol. 117, pp. 821-831, 1999. DOI: https://doi.org/10.1016/S0010-2180(98)00127-8   DOI
9 Shengli Niu, Kuihua Han, Chunmei Lu, "An experimental study on the effect of operation parameters and sodium additive on the NOOUT process", Process Safety and Environmental Protection, vol. 89, pp. 121-126, 2011. DOI: https://doi.org/10.1016/j.psep.2011.01.001   DOI
10 Ping Lu, Jiangtao Hao, Wei Yu, Xiuming Zhu, Xin Dai, "Effects of water vapor and Na/K additives on NO reduction through advanced biomass reburning", Fuel, vol. 170, pp. 60-66, 2016. DOI: https://doi.org/10.1016/j.fuel.2015.12.037   DOI
11 H. Chen, D.Z. Chen, S. Fan, L. Hong, D. Wang, "SNCR De-NO within a moderate temperature range using urea-spiked hydrazine hydrate as reductant", Chemosphere, vol. 161, pp. 208-218, 2016. DOI: https://doi.org/10.1016/j.chemosphere.2016.07.010   DOI
12 Ping Fang, Zi-Jun Tang, Jian-Hang Huang, Chao-Ping Cen, Zhi-Xiong Tang, Xiong-Bo Chen, "Using sewage sludge as a denitration agent and secondary fuel in a cement plany: A case study", Fuel Processing Technology, vol. 137, pp. 1-7, 2015. DOI: https://doi.org/10.1016/j.fuproc.2015.03.014   DOI
13 P. Lodder, J. B. Lefer, "Effect of natural gas, C2H6 and CO on the homogeneous gas phase reduction of NOx by NH3", The Chemical Engineering Journal, vol. 30, pp. 161-167, 1985. DOI: https://doi.org/10.1016/0300-9467(85)80026-5   DOI
14 M. Ostberg, K. Dam-Johansen, J. E. Johansson, "Influence of the SNCR process", Chemical Engineering Science, vol. 52, no. 15, pp. 2511-2525, 1997. DOI: https://doi.org/10.1016/S0009-2509(97)00069-9   DOI
15 M. Ostberg, K. Dam-Johansen, "Empirical modeling of the Selective Non-Catalytic Reduction of NO : comparison with large-scale experiments and detailed kinetic modeling, Chemical Engineering Science, vol. 49, 12, pp. 1879-1904, 1994. DOI: https://doi.org/10.1016/0009-2509(94)80074-X   DOI
16 Muhammad Ayoub, Muhammad Faisal Irfan, Kyung-Seun Yoo, "Surfactants as additives for NO reduction during SNCR process with urea solution as reducing agnet", Energy Conversion and Management, vol. 52, no. 3, pp. 3083-308, 2011. DOI: https://doi.org/10.1016/j.enconman.2011.04.010   DOI