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Effect of K and Ca on catalytic activity of Mn-CeOx/Ti-PILC |
Boxiong SHEN( ), Lidan DENG, Jianhong CHEN |
| College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China |
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Abstract Mn-CeOx/Ti-pillared clay (PILC) is an attractive catalyst for selective catalytic reduction of NOx at low temperature because of its low cost. The poisoning of K and Ca on the catalyst of Mn-CeOx/Ti-PILC is an important problem because K and Ca are always in presence in flue gas. To investigate the effect of K and Ca on the physicochemical characters of the catalysts, the techniques of NH3-temperature programmed desorption (TPD), H2-temperature programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS) were used to analyze the fresh and deactivated catalysts of Mn-CeOx/Ti-PILC. (Ca)Mn-CeOx/Ti-PILC and (K)Mn-CeOx/Ti-PILC are denoted for the dopes of the catalyst of Mn-CeOx/Ti-PILC with Ca and K, respectively. The activities of Mn-CeOx/Ti-PILC, (Ca)Mn-CeOx/Ti-PILC and (K)Mn-CeOx/Ti-PILC for NH3-selective catalytic reduction (SCR) reaction at low temperature were investigated. The results showed that with the dopes of K and Ca on the catalysts, the SCR activities of the catalysts decreased greatly, and K exhibited more poisoning effect than Ca. With the dopes of K and Ca, the acidity, the redox property and chemisorbed oxygen on the surfaces of the catalysts were decreased, which resulted in a decreasing in SCR activity.
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| Keywords
Mn-CeOx/Ti-pillared clay (PILC)
low-temperature selective catalytic reduction (SCR)
K and Ca poisoning effect
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Corresponding Author(s):
SHEN Boxiong,Email:shenbx@nankai.edu.cn
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Issue Date: 01 August 2013
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| 1 |
Heck R M. Catalytic abatement of nitrogen oxides–stationary applications. Catalysis Today , 1999, 53(4): 519–523
doi: 10.1016/S0920-5861(99)00139-X
|
| 2 |
Chen L , Li J H, Ge M F. The poisoning effect of alkali metals doping over nano V2O5–WO3/TiO2 catalysts on selective catalytic reduction of NOx by NH3. Chemical Engineering Journal , 2011, 170(2-3): 531–537 http://dx.doi.org/10.1016/j.cej.2010.11.020
|
| 3 |
Qi G S, Yang R T, Chang R. MnOx-CeO2 mixed oxides prepared by co-precipitation for selective catalytic reduction of NO with NH3 at low temperatures. Applied Catalysis B: Environmental , 2004, 51(2): 93–106
doi: 10.1016/j.apcatb.2004.01.023
|
| 4 |
Jia L W, Shen M Q, Wang J , Chu X, Wang J M, Hu Z C. Redox behaviors and structural characteristics of Mn0.1Ce0.9Ox and Mn0.1Ce0.6Zr0.3Ox. Journal of Rare Earths , 2008, 26(4): 523–527
doi: 10.1016/S1002-0721(08)60130-1
|
| 5 |
Eigenmann F, Maciejewski M, Baiker A. Selective reduction of NO by NH3 over manganese–cerium mixed oxides: relation between adsorption, redox and catalytic behavior. Applied Catalysis B: Environmental , 2006, 62(3-4): 311–318
doi: 10.1016/j.apcatb.2005.08.005
|
| 6 |
Jin R, Liu Y, Wu Z, Wang H, Gu T. Low-temperature selective catalytic reduction of NO with NH3 over Mn-Ce oxides supported on TiO2 and Al2O3: a comparative study. Chemosphere , 2010, 78(9): 1160–1166
doi: 10.1016/j.chemosphere.2009.11.049 pmid:20042220
|
| 7 |
Zheng Y J, Jensen A D, Johnsson J E. Deactivation of V2O5-WO3-TiO2 SCR catalyst at a biomass-?red combined heat and power plant. Applied Catalysis B: Environmental , 2005, 60(3-4): 253–264
doi: 10.1016/j.apcatb.2005.03.010
|
| 8 |
Zhang X L, Huang Z G, Liu Z Y. Effect of KCl on selective catalytic reduction of NO with NH3 over a V2O5/AC catalyst. Catalysis Communications , 2008, 9(5): 842–846
doi: 10.1016/j.catcom.2007.09.008
|
| 9 |
Tang F S, Xu B L, Shi H H ,Qiu J H, Fan Y N . The poisoning effect of Na+ and Ca2+ ions doped on the V2O5/TiO2 catalysts for selective catalytic reduction of NO by NH3. Applied Catalysis B: Environmental , 2010, 94(1–2): 71–76
|
| 10 |
Shen B X, Ma H Q, Yan X Y. Study on Ti-pillared interlayered clays supported MnOx-CeO2 catalysts for selective catalytic reduction of NO by NH3 at low temperature. Proceedings of the CSEE , 2011, 31(26): 53–58
|
| 11 |
Nicosia D, Czekaj I, Kr?cher O. Chemical deactivation of V2O5/WO3–TiO2 SCR catalysts by additives and impurities from fuels, lubrication oils and urea solution: Part II. characterization study of the effect of alkali and alkaline earth metals. Applied Catalysis B: Environmental , 2008, 77(3–4): 228–236
doi: 10.1016/j.apcatb.2007.07.032
|
| 12 |
Klimczak M, Kern P, Heinzelmann T, Lucas M, Claus P. High-throughput study of the effects of inorganic additives and poisons on NH3-SCR catalysts—Part I: V2O5–WO3/TiO2 catalysts. Applied Catalysis B: Environmental , 2010, 95(1–2): 39–47
doi: 10.1016/j.apcatb.2009.12.007
|
| 13 |
Lisi L, Lasorella G, Malloggi S, Russo G. Single and combined deactivating effect of alkali metals and HCl on commercial SCR catalysts. Applied Catalysis B: Environmental , 2004, 50(4): 251–238
doi: 10.1016/j.apcatb.2004.01.007
|
| 14 |
Ettireddy P R, Ettireddy N, Mamedov S, Boolchand P, Smirniotis P G. Surface characterization studies of TiO2 supported manganese oxide catalysts for low temperature SCR of NO with NH3. Applied Catalysis B: Environmental , 2007, 76(1-2): 123–134
doi: 10.1016/j.apcatb.2007.05.010
|
| 15 |
Delimaris D, Ioannides T. VOC oxidation over MnOx-CeO2 catalysts prepared by a combustion method. Applied Catalysis B: Environmental , 2008, 84(1–2): 303–312
doi: 10.1016/j.apcatb.2008.04.006
|
| 16 |
Bulushev D A, Rainone F, Lioubov K M, Albert R. Influence of potassium doping on the formation of vanadia species in V/Ti oxide catalysts. Langmuir , 2001, 17(17): 5276–5282
doi: 10.1021/la010077g
|
| 17 |
Kapteijn F, Singoredjo L, Andreini A, Moulijn J A. Activity and selectivity of pure manganese oxides in the selective catalytic reduction of nitric oxide with ammonia. Applied Catalysis B: Environmental , 1994, 3(2-3): 173–189
doi: 10.1016/0926-3373(93)E0034-9
|
| 18 |
Pe?a D A, Uphade B S, Reddy E P, Smirniotis P G. Identi?cation of surface species on titania-supported manganese, chromium, and copper oxide low-temperature SCR catalysts. Journal of Physical Chemistry B , 2004, 108(28): 9927–9936
doi: 10.1021/jp0313122
|
| 19 |
Szajman J, Smart R St C, Myhra S. X-ray photoelectron spectroscopy studies of valence states of cerium and uranium in SYNROC C. Surface and Coatings Technology , 1987, 30(4): 333–342
doi: 10.1016/0257-8972(87)90125-3
|
| 20 |
Chang L H, Sasirekha N, Chen Y W, Wang W J. Preferential oxidation of CO in H2 stream over Au/MnO2-CeO2 catalysts. Industrial & Engineering Chemistry Research , 2006, 45(14): 4927–4935
doi: 10.1021/ie0514408
|
| 21 |
Kang M, Park E D, Kim J M, Yie J E. Manganese oxide catalysts for NOx reduction with NH3 at low temperatures. Applied Catalysis A, General , 2007, 327(2): 261–269
doi: 10.1016/j.apcata.2007.05.024
|
| 22 |
Wu Z B, Jin R B, Liu Y, Wang H Q. Ceria modi?ed MnOx/TiO2 as a superior catalyst for NO reduction with NH3 at low-temperature. Catalysis Communications , 2008, 9(13): 2217–2220
doi: 10.1016/j.catcom.2008.05.001
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