Abstract
Selective catalytic reduction (SCR) with ammonia has been considered as the most promising technology, as its effect deals with the NOX. Novel Fe-doped V2O5/TiO2 catalysts were prepared by sol–gel and impregnation methods. The effects of iron content and reaction temperature on the catalyst SCR reaction activity were explored by a test device, the results of which revealed that catalysts could exhibit the best catalytic activity when the iron mass ratio was 0.05%. It further proved that the VTiFe (0.05%) catalyst performed the best in denitration and its NOX conversion reached 99.5% at 270 °C. The outcome of experimental procedures: Brunauer–Emmett–Teller surface area, X-ray powder diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed reduction and adsorption (H2-TPR, NH3-TPD) techniques showed that the iron existed in the form of Fe3+ and Fe2+ and the superior catalytic performance was attributed to the highly dispersed active species, lots of surface acid sites and absorbed oxygen. The modified Fe-doped catalysts do not only have terrific SCR activities, but also a rather broad range of active temperature which also enhances the resistance to SO2 and H2O.
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References
Apostolescu N, Geiger B, Hizbullah K et al (2006) Selective catalytic reduction of nitrogen oxides by ammonia on iron oxide catalysts. Appl Catal B 62(s1–2):104–114. https://doi.org/10.1016/j.apcatb.2005.07.004
Busca G, Lietti L, Ramis G et al (1998) Chemical and mechanistic aspects of the selective catalytic reduction of NOx, by ammonia over oxide catalysts: a review. Appl Catal B 18(18):1–36. https://doi.org/10.1016/S0926-3373(98)00040-X
Chang SM, Liu WS (2011) Surface doping is more beneficial than bulk doping to the photocatalytic activity of vanadium-doped TiO2. Appl Catal B 101:333–342. https://doi.org/10.1016/j.apcatb.2010.09.035
Cheng K, Liu J, Zhang T et al (2014) Effect of Ce doping of TiO2 support on NH3-SCR activity over V2O5–WO3/CeO2–TiO2 catalyst. J Environ Sci 26(10):2106–2113. https://doi.org/10.1016/j.jes.2014.08.010
Forzatti P (2001) Present status and perspectives in de-NOX SCR catalysis. Appl Catal A 222(1–2):221–236. https://doi.org/10.1016/S0926-860X(01)00832-8
Gao Y, Thevuthasan S, McCready DE, Engelhard M (2000) MOCVD growth and structure of Nb- and V-doped TiO2 films on sapphire. J Cryst Growth 212:178–190. https://doi.org/10.1016/S0022-0248(00)00010-5
Gao X, Jiang Y, Zhong Y et al (2010) The activity and characterization of CeO2–TiO2 catalysts prepared by the sol–gel method for selective catalytic reduction of NO with NH3. J Hazard Mater 174(1–3):734–739. https://doi.org/10.1016/j.jhazmat.2009.09.112
Gao R, Zhang D, Liu X et al (2012) Enhanced catalytic performance of V2O5–WO3/Fe2O3/TiO2 microspheres for selective catalytic reduction of NO by NH3. Catal Sci Technol 3(1):191–199. https://doi.org/10.1039/c2cy20332d
Li L, Liu CY, Liu Y (2009) Study on activities of vanadium (IV/V) doped TiO2 (R) nanorods induced by UV and visible light. Mater Chem Phys 113:551–557. https://doi.org/10.1016/j.matchemphys.2008.08.009
Li W, Guo RT, Wang SX et al (2016) The enhanced Zn resistance of Mn/TiO2, catalyst for NH3-SCR reaction by the modification with Nb. Fuel Process Technol 54:235–242. https://doi.org/10.1016/j.fuproc.2016.08.038
Liu FD, He H (2010) Structure-activity relationship of iron titanate catalysts in the selective catalytic reduction of NOx with NH3. J Phys Chem C 114(40):16929–16936. https://doi.org/10.1021/jp912163k
Liu F, He H, Lian Z et al (2013) Highly dispersed iron vanadate catalyst supported on TiO2, for the selective catalytic reduction of NOx, with NH3. J Catal 307(11):340–351. https://doi.org/10.1016/j.jcat.2013.08.003
Liu F, Yu Y, He H (2014) Environmentally-benign catalysts for the selective catalytic reduction of NO(x) from diesel engines: structure-activity relationship and reaction mechanism aspects. Chem Commun 50(62):8445. https://doi.org/10.1039/C4CC01098A
Long RQ, Yang RT (2002) Selective catalytic oxidation of ammonia to nitrogen over Fe2O3–TiO2 prepared with a Sol–Gel Method. J Catal 207(2):158–165. https://doi.org/10.1006/jcat.2002.3545
McBride JR, Hass KC, Poindexter BD et al (1994) Raman and X-ray studies of Ce1-xRExO2-y, where RE = La, Pr, Nd, Eu, Gd, and Tb. J Appl Phys 76:2435–2441. https://doi.org/10.1063/1.357593
Pan Y, Wei Z, Qin Z et al (2013) Promotional effect of Si-doped V2O5/TiO2 for selective catalytic reduction of NOx by NH3. J Environ Sci 25(8):1703–1711. https://doi.org/10.1016/S1001-0742(12)60181-8
Park H, Choi W (2004) Effects of TiO2 surface fluorination on photocatalytic reaction and photoelectrochemical behaviors. J Phys Chem B 108:4086–4093. https://doi.org/10.1021/jp036735i
Ramis G, Yi L, Busca G (1996) Ammonia activation over catalysts for the selective catalytic reduction of NOx and the selective catalytic oxidation of NH3 An FT-IR study. Catal Today 28(4):373–380. https://doi.org/10.1016/S0920-5861(96)00050-8
Roozeboom F, Medema J, Gellings PJ (1978) Vanadium oxide monolayer catalysts. Z Phys Chem 111(2):215–224. https://doi.org/10.1524/zpch.1978.111.2.215
Roy S, Viswanath B, Hegde MS et al (2008) Low-temperature selective catalytic reduction of NO with NH3 over Ti0.9M0.1O2–delta (M = Cr, Mn, Fe Co, Cu). J Phys Chem C 112(15):6002–6012. https://doi.org/10.1021/jp7117086
Schill L, Putluru SSR, Jensen AD et al (2014) Effect of Fe doping on low temperature deNOx activity of high-performance vanadia anatase nanoparticles. Catal Commun 56(41):110–114. https://doi.org/10.1016/j.catcom.2014.07.015
Shan W, Liu F, He H et al (2012a) A superior Ce–W–Ti mixed oxide catalyst for the selective catalytic reduction of NOx with NH3. Appl Catal B 115–116(4):100–106. https://doi.org/10.1016/j.apcatb.2011.12.019
Shan W, Liu F, He H et al (2012b) An environmentally-benign CeO2–TiO2 catalyst for the selective catalytic reduction of NOx with NH3 in simulated diesel exhaust. Catal Today 184(1):160–165. https://doi.org/10.1016/j.cattod.2011.11.013
Shu Y, Wang H, Zhu J et al (2014) Mechanism of the selective catalytic reduction of NOx with NH3 over W-doped Fe/TiO2 catalyst. Chem Res Chin Univ 30(6):1005–1010. https://doi.org/10.1007/s40242-014-4161-4
Wilken N, Nedyalkova R, Kamasamudram K et al (2013) Investigation of the effect of accelerated hydrothermal aging on the Cu sites in a Cu-BEA catalyst for NH3-SCR applications. Top Catal 56(1):317–322. https://doi.org/10.1007/s11244-013-9973-9
Zhan S, Zhu D, Qiu M et al (2015) Highly efficient removal of NO with ordered mesoporous manganese oxide at low temperature. Rsc Adv 5(37):29353–29361. https://doi.org/10.1039/C4RA17300G
Zhang S, Li H, Qin Z (2012) Promotional effect of F-doped V2O5–WO3/TiO2 catalyst for NH3-SCR of NO at low-temperature. Appl Catal A s435–436(17):156–162. https://doi.org/10.1016/j.apcata.2012.05.049
Zhang R, Zhong Q, Zhao W et al (2014) Promotional effect of fluorine on the selective catalytic reduction of NO with NH3 over CeO2–TiO2 catalyst at low temperature. Proc Inst Mech Eng Part D J Automob Eng 289(1):237–244. https://doi.org/10.1016/j.apsusc.2013.10.143
Zhao W, Zhong Q, Zhang TJ, Pan YX (2012) Characterization study on the promoting effect of F-doping V2O5/TiO2 SCR catalysts. RSC Adv 2:7906–7914. https://doi.org/10.1039/C2RA20987J
Acknowledgements
We gratefully acknowledge financial support from the National Natural Science Foundation of China (NOs. 51476071, . 51506077), Jiangsu Provincial Natural Science Foundation of China (NO. BK20150488), Jiangsu Provincial Natural Science Foundation of China (NO. 15KJB610003) and the Advanced Talent Foundation of Jiangsu University (NO. 15JDG156).
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Wu, LC., Wang, Q., Zhao, W. et al. Study of Fe-doped V2O5/TiO2 catalyst for an enhanced NH3-SCR in diesel exhaust aftertreatment. Chem. Pap. 72, 1981–1989 (2018). https://doi.org/10.1007/s11696-018-0437-3
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DOI: https://doi.org/10.1007/s11696-018-0437-3