Effect of Silica-Alumina Ratio of Catalysts on NO Decomposition Rate in Cement Kiln Exhaust

Abstract:

In order to deal with the pollution of NO in cement kiln exhaust, the study of NO catalytic decomposition catalyst obtained much more attention. The effect of silica-alumina ratio on NO decomposition rate in cement kiln without other reductant was studied. The NO decomposition rate of catalysts with different silica-alumina ratio was determined by infrared spectrometer. And pore structures and the microstructure of the catalyst were characterized separately by BET surface area, nitrogen adsorption-desorption and XRD. The results show that silica-alumina ratio of catalyst was preferred to be 50 with the best NO decomposition rate when the temperature was below 300 °C. The catalyst with silica-alumina ratio of 60 has the higher catalytic activity when the temperature was higher than 300 °C, and the decomposition rate achieved 70% at 600 °C. XRD results shows the crystallinity of catalysts increased as the silica-alumina ratio increased. BET surface area and the cumulative pore volume of catalysts gradually increased, and the average pore diameter gradually reduced with the increase of silica-alumina ratio.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 1450-1455
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.1450
• Online since: May 2020
• Authors: Yan Ling Gan, Su Ping Cui*, Xiao Yu Ma, Ya Li Wang
• Keywords: Catalyst, Cement Kiln, NO Decomposition Rate, Silica-Alumina Ratio

References

[1] Kawakami M, Furumura T, Tokushige H. NOx removal effects and physical properties of cement mortar incorporating titanium dioxide powder. Environment and Construction Materials. (2007) 8-9.

DOI: 10.2472/jsms.55.923

[2] Battye R, Walsh S, Lee-Greco J. NOx control technologies for the cement industry, Triangle Park, NC, (2000).

[3] Gortzen J, Brem G, Luijten M, et al. NOx-reduction by SNCR with alternative reagents for rotary kilns in cement plants. ZKG international. 56 (2003) 37-45.

[4] Li C, Cui S, Gong X, Meng X, Wang H. LCA method of MSC and low-NOx burner technology in cement manufacturing, Mater. Sci. Forum. 743-744 (2013) 802-806.

DOI: 10.4028/www.scientific.net/msf.743-744.802

[5] Glick HS, Klein JJ, Squire W. Single - pulse shock tube studies of the kinetics of the reaction N2+O2⇄2NO between 2000–3000°K. J Chem Phys. 27 (1957) 850–857.

DOI: 10.1063/1.1743864

[6] Fritz A, Pitchon V. The current state of research on automotive lean NOx catalysis. Appl Catal B. 13 (1997) 1–25.

DOI: 10.1016/s0926-3373(96)00102-6

[7] Wang X, Sigmon SM, Spivey JJ, Lamb HH. Support and particle size effects on direct NO decomposition over platinum. Catalysis Today. 96 (2004) 11–20.

DOI: 10.1016/j.cattod.2004.05.003

[8] Arvulescu V.I. P, Grange P., Delmon B., Catalytic removal of NO. Appl. Catal. B: Environ. 33 (2001) 223.

[9] Yu K. M., Rasmussen S.B., Kustov A.L, Christensen C.H., Direct NO decomposition over conventional and mesoporous Cu-ZSM-5 and Cu-ZSM-11 catalysts: Improved performance with hierarchical zeolites. Appl. Catal. B. 67 (2006) 60-67.

DOI: 10.1016/j.apcatb.2006.04.014

[10] Amirnazmi A, Benson JE, Boudart M. Decomposition of nitric oxide on platinum. J Catal. 30 (1973) 55–65.

[11] Haneda M, Tsuboi G, Nagao Y, Kintaichi Y, Hamada H. Direct decomposition of NO over alkaline earth metal oxide catalysts supported on cobalt oxide. Catal Lett. 97 (2004) 145–150.

DOI: 10.1023/b:catl.0000038576.58825.af

[12] Pena MA, Fierro JLG. Chemical structures and performance of perovskite oxides. Chem Rev. 101 (2001) 1981–(2018).

[13] Zhu J, Xiao D, Li J, Yang X, Wu Y. Mechanism of NO decomposition on perovskite (-like) catalysts, Chin Sci Bull. 50 (2005) 707–710.

[14] Iwamoto M, Yahiro H, Mine Y, Kagawa S. Chem Lett. 18 (1989) 213–216.

[15] Iwamoto M, Yahiro H, Torikai Y, Yoshioka T, Mizuno N. Chem Lett. 19 (1990) 1967–(1970).

[16] B.L. Trout, A.K. Chakraborty, A.T. Bell, A density functional theory study of hydrogen recombination and hydrogen-deuterium exchange on Ga/H-ZSM-5. J. Phys. Chem. 100 (1996) 17582–17592.

[17] F.E. Trigueiro, D.F.J. Monteiro, F.M.Z. Zotin, E.F. Sousa-Aguiar, Thermal stability of Y zeolites containing different rare earth cations. J. Alloys Compd. 344 (2002) 337–341.

DOI: 10.1016/s0925-8388(02)00381-x

[18] Takeshi Ohnishi a, Koutarou Kawakami a, Masateru Nishioka b, Masaru Ogura, Direct decomposition of NO on metal-loaded zeolites with coexistence of oxygen and water vapor under unsteady-state conditions by NO concentration and microwave rapid heating. Catal. Today. 281 (2016) 566-574.

DOI: 10.1016/j.cattod.2016.07.012