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louis.troy

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Applications of MnOx-CeO2 Mixed Oxides in Environmental Catalysis
Part I  Catalytic Wet Oxidation
Catalytic wet oxidation performances of catalysts. [TOC] = [TN] = 2000 ppm, 60min. PO2 = 1.0 Mpa. S. Imamura et al. Ind. Eng. Chem. Prod. Res. Dev. 25 (1986) 34-37.  
Catalytic Wet Oxidation of Phenol  
S. Bhargava, et al., Ind. Eng. Chem. Res., 45 (2006) 1221 -1258
Catalytic Wet Oxidation of NH3
Effect of the composition of the MnOx-CeO2 catalysts for wet-oxidation
of ammonia at 536K    S. Imamura et al. Ind. Eng. Chem. Prod. Res. Dev. 24 (1985) 75-80.
Catalytic Wet Oxidation of Phenol  
Effect of Mn/Ce composition on phenol wet oxidation: (a) TOC conversion; (b) phenol conversion. F. Larachi, et al. Appl. Catal. B 32 (2001) 195-204.
XRD
XRD patterns of Mn/Ce samples with different compositions
F. Larachi, et al. Appl. Catal. B 32 (2001) 195-204.
M. Machida, Chem. Mater. 12 (2000) 3165-3170
Structural Parameters----MnOx-CeO2  
Dependence of the (a) lattice parameter, (b) volume, and (c) oxygen ion vacancy with [Mn]/[Mn + Ce].   A. Ramaswamy, Chem. Mater. 12 (2005) 3165-3170.
Mobility of Oxygen  
Change in the valence of Mn during heat treatment in air
                        S. Imamura et al. Appl. Catal. A 142 (1996) 279-288
Promoting Effect -----PtyAgz/MnOx-CeO2  
TOC conversions and mineralization selectivity reached after 1h of CWO at 80oC for different catalyst formulations.  F. Larachi, et al., Catal. Today, 62 (2000), 379-388.
TPO-MS profiles for MnO2/CeO2 and M¨CMnO2/CeO2 catalysts after 60 min of CWO
at 80¡ãC (1): H2PtCl6; (2): K2Pt(CN)6. F. Larachi, et al., Catal. Today, 62 (2000), 379-388.
TPR profiles of PtyAgz/MnOx-CeO2  
TPR profiles for MnO2/CeO2 and M¨CMnO2/CeO2 catalysts
F. Larachi et al., Catal. Today, 62 (2000), 379-388.
Promoting Effect -----K2O/MnOx-CeO2  
TOC conversion and mineralization selectivity
F. Larachi et al., J. Catal. 201 (2001) 153-157
& Appl. Catal. B, 34 (2001), 1-9.
TPR of K2O/MnOx-CeO2  
TPR profiles for fresh and used catalysts
F. Larachi et al., Appl. Catal. B, 34 (2001), 1-9.
Part II Selective Catalytic Reduction
Selective Catalytic Reduction
L. Lietti, et al., Appl. Catal. B 18 (1998) 1-36
Selective Catalytic Reduction of NO with NH3
NO conversions for various MnOx¨CCeO2 mixed-oxide catalysts. [NH3]=[NO]= 1000 ppm, [O2]= 2%, GHSV = 42,000h¨C1. R. Yang, Chem. Commun., (2003) 848-849  
Effect of on-stream time on SCR activity with H2O + SO2 and without H2O + SO2
120 ¡ãC, [NH3]=[NO]= 1000 ppm, [O2]= 2%, GHSV = 42,000h¨C1. Catalyst: MnOx(0.3)¨CCeO2(650)      R. Yang, J. Catal. 217 (2003) 434-441.
The effects of SO2 and H2O on the SCR activities of MnOx(0.4)-CeO2(500)-based catalysts. Reaction conditions: 0.2 g catalyst, [NH3]=[NO]=1000 ppm, [O2]=2%, He=balance and total flow rate=100 ml/min, T=150 ¡ãC.
R. Yang, Appl. Catal. B 51 (2004) 93-106.
Oxygen Transfer Mechanism
2MnO2 ¡ú Mn2O3 + O*   
                     
Mn2O3 + 2CeO2 ¡ú 2MnO2 + Ce2O3   

Ce2O3 + 1/2O2 ¡ú 2CeO2
Synergetic Effect:

I.  MnO2
II. Mn/Ce  1.0
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