ars.els-cdn.com · web viewb national engineering laboratory for multi flue gas pollution control...
TRANSCRIPT
Supporting Information
Enhanced low-temperatures activity of LaMnO3 for toluene
oxidation: the effect of treatment with an acidic KMnO4 solution
Bing Lia,b,1, Qilei Yanga,1, Yue Penga, Jianjun Chena,b,*, Lei Dengb, Dong Wanga, Shuai liua,
Xiaowei Honga,b, Junhua Lia,b,*
a State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua
University, Beijing, 100084
b National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and
Equipment, School of Environment, Tsinghua University, Yancheng, 100084, China.
⁎ Corresponding authors
E-mail: [email protected], [email protected]
1Author contributions
Dr. Bing Li and Qilei Yang contributed equally to this work.
Fig. S1 Diagram of catalytic evaluation for toluene oxidation.Fig. S2 SEM-EDS elemental mappings (a) bulk LaMnO3 (b) MnOx/LaMnO3 (c) MnO2/LaMnO3
Fig. S3 Toluene conversion over MnO2/LaMnO3 with the toluene concentration at 500 ppm, 1000 ppm and 1500 ppm. Reaction conditions: 0.10 g catalyst, 20% O2, balance N2, WHSV = 40000 mL g-1 h-1.Fig. S4. Effects of H2O on the activity of the MnO2/LaMnO3 at 240 °C. Reaction conditions: 0.10 g catalyst, 1000 ppm toluene, 20% O2, 2% H2O, balance N2, WHSV = 40000 mL g-1 h-1.Table S1 The results from SEM-EDS analyses of the three samples.
Fig. S1 Diagram of catalytic evaluation for toluene oxidation.
Fig. S2 SEM-EDS elemental mappings (a) bulk LaMnO3 (b) MnOx/LaMnO3 (c) MnO2/LaMnO3
190 200 210 220 230 240 2500
20
40
60
80
100
240235222
207 228
Temperaturte(oC)
Tolu
ene
conv
ersi
on(%
)
500 ppm 1000 ppm 1500 ppm
225
Fig. S3 Toluene conversion over MnO2/LaMnO3 with the toluene concentration at 500 ppm, 1000 ppm and 1500 ppm. Reaction conditions: 0.10 g catalyst, 20% O2, balance N2, WHSV = 40000 mL g-1 h-1.
50
60
70
80
90
10094.0 % 95.5 %
240 oC (120 min)
2% H2O off
Tolu
ene
conv
ersi
on(%
)
Time on stream (min)
2% H2O in
96.0 %
Fig. S4. Effects of H2O on the activity of the MnO2/LaMnO3 at 240 °C. Reaction conditions: 0.10 g catalyst, 1000 ppm toluene, 20% O2, 2% H2O, balance N2, WHSV = 40000 mL g-1 h-1.
Table S1 The results from SEM-EDS analyses of the three samples.
Sample Element wt.% Atom %
O K 20.74 62.93bulk LaMnO3 La L 61.71 21.56
Mn K 17.55 15.50
O K 17.53 55.25MnOx/LaMnO3 La L 55.75 20.24
Mn K 26.71 24.52
O K 26.60 68.37MnO2/LaMnO3 La L 51.50 15.24
Mn K 21.89 16.38