Influence of Ce-doping on MnOx-ZSM-5 catalysts for the selective catalytic reduction of NO/NO2 with NH3

Reaction Kinetics, Mechanisms and Catalysis - Tập 125 - Trang 1071-1084 - 2018
Xiaochu Yang1, Haiping Xiao1, Jun Liu1, Zhentian Wan1, Tao Wang1, Baomin Sun1
1Education Ministry Key Laboratory on Condition Monitoring and Control of Power Plant Equipment, North China Electric Power University, Beijing, China

Tóm tắt

A series of MnOx-CeO2/ZSM-5 catalysts with different Ce loadings were prepared through the impregnation method and characterized by BET, XRD, SEM, H2-TPR, and XPS. The performances of selective catalytic reduction (SCR) of NO/NO2 with NH3 and NO oxidation over MnOx-CeO2/ZSM-5 catalysts were investigated. The result showed that the MnOx dispersions, redox abilities and proportions of Mn4+ of catalysts were enhanced by the doping of CeO2. However, the excessive Ce loadings led to the accumulation of active components on the catalyst surface. The sample with Ce/Mn molar ratio of 0.39 exhibited the best SCR performance, the NOx conversion achieved 95.4% at 150 °C, and maintained higher than 95% in a wide operating temperature range (150–350 °C). MnOx-CeO2/ZSM-5 also exhibited considerable catalytic performance of NO oxidation, the maximum conversion of NO achieved 56.5% at 350 °C.

Tài liệu tham khảo

Shi XY, Liu FD, Xie LJ, Shan W, He H (2013) NH3-SCR performance of fresh and hydrothermally aged Fe-ZSM-5 in standard and fast selective catalytic reduction reactions. Environ Sci Technol 47(7):3293–3298 Ruggeri MP, Grossale A, Nova I, Tronconi E, Jirglova H, Sobalik Z (2012) FTIR in situ mechanistic study of the NH3-NO/NO2 “Fast SCR” reaction over a commercial Fe-ZSM-5 catalyst. Catal Today 184(1):107–114 Colombo M, Nova I, Tronconi E, Schmeißer V, Bandl-Konrad B, Zimmermann L (2012) NO/NO2/N2O–NH3 SCR reactions over a commercial Fe-zeolite catalyst for diesel exhaust aftertreatment: intrinsic kinetics and monolith converter modelling. Appl Catal B-Environ 111–112:106–118 Iwasaki M, Shinjoh H (2010) A comparative study of “standard”, “fast” and “NO2” SCR reactions over Fe/zeolite catalyst. Appl Catal A 390:71–77 Grossale A, Nova I, Tronconi E, Chatterjee D, Weibel M (2009) NH3–NO/NO2 SCR for diesel exhausts aftertreatment: reactivity, mechanism and kinetic modelling of commercial Fe- and Cu-promoted zeolite catalysts. Top Catal 52:1837–1841 Putluru SSR, Schill L, Mossin S, Jensen AD, Fehrmann R (2014) Hydrothermally stable Fe–W–Ti SCR catalysts prepared by deposition–precipitation. Catal Lett 144:1170–1177 Zhang QL, Xu LS, Ning P, Gu JJ, Guan QQ (2014) Surface characterization studies of CuO-CeO2-ZrO2 catalysts for selective catalytic reduction of NO with NH3. Appl Surf Sci 317:955–961 Sultana A, Sasaki M, Hamada H (2012) Influence of support on the activity of Mn supported catalysts for SCR of NO with ammonia. Catal Today 185(1):284–289 Shen BX, Zhang XP, Ma HQ, Yao Y, Liu T (2012) A comparative study of Mn/CeO2, Mn/ZrO2 and Mn/Ce-ZrO2 for low temperature selective catalytic reduction of NO with NH3 in the presence of SO2 and H2O. J Environ Sci-China 25(4):791–800 Putluru SSR, Schill L, Jensen AD, Siret B, Tabaries F, Fehrmann R (2015) Mn/TiO2 and Mn–Fe/TiO2 catalysts synthesized by deposition precipitation—promising for selective catalytic reduction of NO with NH3 at low temperatures. Appl Catal B 165:628–635 Hwang S, Jo SH, Kim J, Shin MC, Chun HH, Park H, Lee H (2016) Catalytic activity of MnOx/TiO2 catalysts synthesized with different manganese precursors for the selective catalytic reduction of nitrogen oxides. Reac Kinet Mech Cat 117(2):583–591 Wang T, Sun K, Lu Z, Zhang Y (2010) Low temperature NH3-SCR reaction over MnOx supported on protonated titanate. Reac Kinet Mech Cat 101(1):153–161 Yao XJ, Ma KL, Zou WX, He SG, An JB, Yang FM, Dong L (2017) Influence of preparation methods on the physicochemical properties and catalytic performance of MnOx-CeO2 catalysts for NH3-SCR at low temperature. Chin J Catal 38(1):146–159 Liu ZM, Yi Y, Zhang SX, Zhu TL, Zhu JZ, Wang JG (2013) Selective catalytic reduction of NOx with NH3 over Mn-Ce mixed oxide catalyst at low temperatures. Catal Today 216:76–81 Jin RB, Liu Y, Wang Y, Cen WL, Wu ZB, Wang HQ, Weng XL (2014) The role of cerium in the improved SO2 tolerance for NO reduction with NH3 over Mn-Ce/TiO2 catalyst at low temperature. Appl Catal B 148–149(4):582–588 Qi QS, Li W (2015) NO oxidation to NO2 over manganese-cerium mixed oxides. Catal Today 258:205–213 Wu XD, Yu HN, Weng D, Liu S, Fan J (2013) Synergistic effect between MnO and CeO2 in the physical mixture: electronic interaction and NO oxidation activity. J Rare Earth 31(12):1141–1147 Zeng Y, Jiang D, Wang Y, Zhang S, Zhong Q (2017) The inhibition effect of oxygen in the calcination atmosphere on the catalytic performance of MnOx–CeO2 catalysts for NO oxidation. Reac Kinet Mech Cat 122(1):593–604 Yeom YH, Henao J, Li MJ, Sachtler WMH, Weitz E (2005) The role of NO in the mechanism of NOx reduction with ammonia over a BaNa–Y catalyst. J Catal 231(1):181–193 Schwidder M, Heikens S, Toni AD, Geisler S, Berndt M, Brückner A, Grünert W (2008) The role of NO2 in the selective catalytic reduction of nitrogen oxides over Fe-ZSM-5 catalysts: active sites for the conversion of NO and of NO/NO2 mixtures. J Catal 259(1):96–103 Tronconi E, Nova I, Ciardelli C, Chatterjee D, Weibel M (2007) Redox features in the catalytic mechanism of the “standard” and “fast” NH3-SCR of NOx over a V-based catalyst investigated by dynamic methods. J Catal 245(1):1–10 Sun Q, Sachtler WMH (2003) Mn/MFI catalyzed reduction of NOx with alkanes. Appl Catal B 42(4):393–401 Mihályi RM, Schay Z, Szegedi Á (2009) Preparation of In, H-ZSM-5 for DeNOx reactions by solid-state ion exchange. Catal Today 143(3–4):253–260 Krishna K, Makkee M (2006) Preparation of Fe-ZSM-5 with enhanced activity and stability for SCR of NOx. Catal Today 114(1):23–30 Saeidi M, Hamidzadeh M (2017) Co-doping a metal (Cr, Mn, Fe Co, Ni, Cu, and Zn) on Mn/ZSM-5 catalyst and its effect on the catalytic reduction of nitrogen oxides with ammonia. Res Chem Intermediat 43(4):2143–2157 Bin F, Song CL, Lv G, Song JN, Wu SH, Li XD (2014) Selective catalytic reduction of nitric oxide with ammonia over zirconium-doped copper/ZSM-5 catalysts. Appl Catal B 150–151:532–543 Kapteijn F, van Langeveld AD, Moulijn JA, Andreini A, Vuurman MA, Turek AM, Jehng JM, Wachs IE (1994) Alumina-supported manganese oxide catalysts: I. Characterization: effect of precursor and loading. J Catal 150:94–104 Chen QL, Guo RT, Wang QS, Pan WG, Wang WH, Yang NZ, Lu CZ, Wang SX (2016) The catalytic performance of Mn/TiWOx catalyst for selective catalytic reduction of NOx with NH3. Fuel 181:852–858 Iwanowski RJ, Heinonen MH, Janik E (2004) X-ray photoelectron spectra of zinc-blende MnTe. Chem Phys Lett 387(1):110–115 Beyreuther E, Grafström S, Eng LM (2006) XPS investigation of Mn valence in lanthanum manganite thin films under variation of oxygen content. Phys Rev B 73(15):155425 Zhou LL, Li CT, Zhao LK, Zeng GM, Gao L, Wang Y, Yu ME (2016) The poisoning effect of PbO on Mn-Ce/TiO2 catalyst for selective catalytic reduction of NO with NH3 at low temperature. Appl Surf Sci 389:532–539 Thirupathi B, Smirniotis PG (2012) Nickel-doped Mn/TiO2 as an efficient catalyst for the low-temperature SCR of NO with NH3: catalytic evaluation and characterizations. J Catal 288:74–83 Zhang LJ, Cui SP, Guo HX, Ma XY, Luo XG (2014) The influence of K+ cation on the MnOx-CeO2/TiO2 catalysts for selective catalytic reduction of NOx with NH3 at low temperature. J Mol Catal A 390:14–21 Miedziak PJ, Tang Z, Davies TE, Enache DI, Bartley JK, Carley AF, Herzing AA, Kiely CJ, Taylor SH, Hutchings GJ (2009) Ceria prepared using supercritical antisolvent precipitation: a green support for gold–palladium nanoparticles for the selective catalytic oxidation of alcohols. J Mater Chem 19:8619–8627 Shyu JZ, Weber WH, Gandhi HS (1998) Surface characterization of alumina-supported ceria. J Phys Chem 92:4964–4970 Grossale A, Nova I, Tronconi E (2009) Ammonia blocking of the “Fast SCR” reactivity over a commercial Fe-zeolite catalyst for Diesel exhaust aftertreatment. J Catal 265(2):141–147 Heck RM (1999) Catalytic abatement of nitrogen oxides-stationary applications. Catal Today 53:519–523 Grossale A, Nova I, Tronconi E, Chatterjee D, Weibel M (2008) The chemistry of the NO/NO2–NH3 “fast” SCR reaction over Fe-ZSM5 investigated by transient reaction analysis. J Catal 256(2):312–322 Vélez PR, Ellmers I, Huang HM, Bentrup U, Schünemann V, Grünert W, Brückner A (2014) Identifying active sites for fast NH3-SCR of NO/NO2 mixtures over Fe-ZSM-5 by operando EPR and UV–vis spectroscopy. J Catal 316:103–111 Zhao BH, Ran R, Wu XD, Weng D, Wu XY, Huang CY (2014) Comparative study of Mn/TiO2 and Mn/ZrO2 catalysts for NO oxidation. Catal Commun 56:36–40 Tang N, Liu Y, Wang HQ, Wu ZB (2011) Mechanism study of NO catalytic oxidation over MnOx/TiO2 catalysts. J Phys Chem C 115(16):8214–8220 Machida M (2002) NOx-sorbing metal oxides, MnOx–CeO2. oxidative NO adsorption and NOx–H2 reaction. Catal Surv Asia 5(2):91–102