Study of the Effective Parameters on Selective Catalytic Reduction of NOx by Ammonia over a Vanadia-Titania Catalyst from Exhaust Gases
DOI:
https://doi.org/10.24297/jac.v6i2.7665Keywords:
DeNOx, SCR reactor, V2O5/TiO2, Optimal designAbstract
The removal of nitrogen oxides (NOx) is crucial problem for global environment. In This study, a 3D dynamic simulation model for the application in investigation of the reaction characteristic and the phenomena of transport in the catalytic filter of the SCR reactor is introduced. In order to make an assessment on the kinetic parameters of the model by the mechanism of Eley-Ridel (ER) from experimental data, an optimization method which acts by integrating the Taguchi method, a real-coded genetic algorithm auxiliary model is proposed. With the aid of the introduced dynamic model, the impacts of the key parameters, namely operating temperature, the gas hourly space velocity, the amount of the applied ammonium and the cross section of the channel of SCR reactor on the NOx conversion and NH3 slip phenomena were investigated. By comparing with the experimental data available in the literature, it was validated and it is found that NOX conversion increases with the decrease in the operation temperature, the space velocity, the concentration of H2O, the ratio of NH3/NOX, and the increase in O2 concentration. Moreover, it is evident that the reactors with the square shaped cross section have more percentage of conversion but the resident time in the corner increased.
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References
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[28] Liu, F., He, H., Zhang, C., Zhang, F., Zhang, L., Xie, Y., Hu, T., 2010 Selective catalytic reduction of NO with NH3 over iron titanate catalyst: catalytic performance and characterization, Applied Catalyst B: Environmental., 96, 408-420 .
[29] Yang, T.T., Bi, H.T., Cheng, X., 2011 Effect of O2, Co2, and H2O on NO adsorption and selective catalytic reduction over Fe/ZSM-5, Applied Catalyst B: Envirionmental., 102 ,163-171 .
[30] Willi, R., Roduit, B., Koeppel, R.A., Wokaun, A., Baiker, A., 1996 Selective reduction of NO by NH3 over Vanadia based commercial catalyst: parametric sensitivity and kinetic modeling, Chemical Engineering Science., 51, 2897-2902 .
[31] Busca, G., Lietti, L., Ramis, G., Berti, F., 1998 Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalystst: a review, Applied Catalysis B: Environmenta., 18, 1-36 .
[2] Lei, Z., Han, B., Yang, K., Chen, B., 2013 Influence of H2O on the low-temperature NH3-SCR of NO over V2O5/AC catalyst: An experimental and modeling study, Chemical Engineering Journal., 215, 651–657 .
[3] Bergerson, J., Keits, D., 2005 Life cycle assessment of oil sands technologies, Institute of Sustainable Energy, Environment and Economy,Canada., 11 .
[4] Schaub, G., Unruh, D., Wang, J., Turek, T.,2003 Kinetic analysis of selective catalytic NOx reduction (SCR) in a catalytic filter, Chemical Engineering and Processing., 42, 365-371.
[5] Kelly, J.F., Stanciulescu, M., Charland, J.p., 2006 Evaluation of amines for the selective catalyst reduction (SCR) of NOx from diesel engine exhaust, Fuel., 85, 1772-1780 .
[6] Faisal Irfan, M., Mjalli, F.S., Kim, S.D., 2012 Modeling of NH3–NO–SCR reaction over CuO/c-Al2O3 catalyst in a bubbling fluidized bed reactor using artificial intelligence techniques,Fuel., 93, 245–251.
[7] Calatayud, M., Mguig, B., Minot, C., 2004 Modeling catalytic reduction of NO by ammonia over V2O5, Surface Science Reports., 55, 169-236 .
[8] Koebel, M., Elsener, M.,1998 Selective catalytic reduction of NO over commercial DeNOx-catalysts: experimental determination of kinetic and thermodynamic parameters, Chem. Eng. Sci., 53, 657–669 .
[9] Economidis, N., Coil, R.F., Smirniotis, P.F.,1998 Catalytic performance of Al2O3/SiO2/TiO2 loaded with V2O5 for the selective catalytic reduction of NOx with ammonia, Catalysis Today., 40, 27-37 .
[10] Kyu Yun, B., Young Kim, M., 2013 Modeling the selective catalytic reduction of NOx by ammonia over a Vanadia-based catalyst from heavy duty diesel exhaust gases, Applied Thermal Engineering., 50 , 152-158 .
[11] Ochonska-Kryca, J., , Iwaniszynb, M., Piatek, M., J. Jod?owskia, P., Thomasa, J., Ko?odziej, A., ?ojewska, J., 2013 Mass transport and kinetics in structured steel foam reactor with Cu-ZSM-5 catalyst for SCR of NOxwith ammonia, Catalysis Today., 216, 135– 141 .
[12] Zhu, Z.P., Liu, Z.Y., Niu, H.X., Liu, S.J., 1999 Promoting effect of SO2 on activated carbonsupported vanadia catalyst for NO reduction by NH3 at low temperatures, J.Catal., 187, 245–248.
[13] Rajadhyaksha, R.J., Hausinger, G., Zeilinger, H., Ramstetter, A., Scmelz, H., Knùzinger, H., 1989 Vanadia supported on titania—silica: Physical characterization and activity for the selective reduction on nitric oxide, Appl. Catal., 51, 67-79 .
[14] Hadjiivanov, Klissurski, I., 1996 Surface chemistry of titania (anatase) and titania-supported catalysts, Chem Soc. Rev., 25, 61-69.
[15] Centi, G., Perathoner, S., Biglino, P., Giamello, E., 1995 Adsorption and reactivity of NO on copper on alumina catalyst, J. Catal., 152, 75–82 .
[16] Gieshoff, J., Sindlinger, A.S., Spurk, P.C., Van Den Tillaart, J.A.A., Garr, G., 2000 Improved SCR System for Heavy Duty Applications, SAE., 2000-01-0189 .
[17] Nam, J.G., 2007 Static characteristics of a urea-SCR system for NOx reduction in diesel engines, International Journal Automotive Technology., 8 , 283-288 .
[18] Valdes-Solis, T., Marban, G., Antonio, B.F., 2004 Kinetics and mechanism of lowtemperature SCR of NOx with NH3 over vanadium oxide supported on carbon–ceramic cellular monoliths, Ind. Eng. Chem. Res., 43, 2349–2355.
[19] Hsu, L.Y., Teng, H., 2001 Catalytic NO reduction with NH3 over carbon modified by acid oxidation and by metal impression and its kinetic studies, Appl. Catal.B.Environmental., 35, 21–30 .
[20] Lei, Z.G., Long, A.B., Wen, C.P., Zhang, J., Chen, B.H., 2011 Experimental and kinetic study of low temperature selective catalytic reduction of NO with NH3 over the V2O5/AC catalyst, Ind. Eng. Chem. Res., 50, 5360–5368 .
[21] Due-Hansena, J., Rasmussenc, S.B., Mikolajskac, E., Ba˜nares, M.A, vilac, P., Fehrmanna, R., 2011 Redox behaviour of vanadium during hydrogen–oxygen exposure of the V2O5-WO3/TiO2 SCR catalyst at 250 ?C, Applied Catalysis B: Environmental., 107, 340– 346.
[22] Chen, C.T., Tan W.L., 2012 Mathematical modeling, optimal design and control of an SCR reactor for NOx removal, Taiwan Institute of Chemical Engineers., 43, 409–419 .
[23] Dhanushkodi, SR., Mahinpey, N., Wilson, M., 2008 Kinetic and 2D reactor modeling for simulation of the catalytic reduction of NOx in the monolith honeycomb reactor ,Process Safety and Environment Protection., 86, 303–309 .
[24] Tronconi, E., Forzatti, P., Martin, JPG., Mallogi, S., 1992 Selective catalytic removal of NOx: a mathematical model for design of catalyst and reactor,Chemical Engineering Science., 47,2401–2406 .
[25] Chuang, YC., Chen, CT., A., 2011 study on real-coded genetic algorithm for process optimization using ranking selection, direction-based crossover and dynamic mutation, IEEE Congress on Evolution Computation., 160, June 5–8 .
[26] Saracco, G., Specchia, V., 1998 Catalytic filter for flue gas cleaning, in: Cybulski, A., Moulijn, J.A., (eds.), Structured Catalysts and Reactors., pp, 417-434 .
[27] Turek, T., 1992 Katalytische Reduktion von Stickstoffmonoxid in einem rotierenden Wa¨rmeu¨ bertrager, Dissertation, Universita¨t Karlsruhe .
[28] Liu, F., He, H., Zhang, C., Zhang, F., Zhang, L., Xie, Y., Hu, T., 2010 Selective catalytic reduction of NO with NH3 over iron titanate catalyst: catalytic performance and characterization, Applied Catalyst B: Environmental., 96, 408-420 .
[29] Yang, T.T., Bi, H.T., Cheng, X., 2011 Effect of O2, Co2, and H2O on NO adsorption and selective catalytic reduction over Fe/ZSM-5, Applied Catalyst B: Envirionmental., 102 ,163-171 .
[30] Willi, R., Roduit, B., Koeppel, R.A., Wokaun, A., Baiker, A., 1996 Selective reduction of NO by NH3 over Vanadia based commercial catalyst: parametric sensitivity and kinetic modeling, Chemical Engineering Science., 51, 2897-2902 .
[31] Busca, G., Lietti, L., Ramis, G., Berti, F., 1998 Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalystst: a review, Applied Catalysis B: Environmenta., 18, 1-36 .
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Published
2014-01-05
How to Cite
Atashi, H., & Moradian, E. (2014). Study of the Effective Parameters on Selective Catalytic Reduction of NOx by Ammonia over a Vanadia-Titania Catalyst from Exhaust Gases. JOURNAL OF ADVANCES IN CHEMISTRY, 6(2), 1024–1037. https://doi.org/10.24297/jac.v6i2.7665
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