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Frontiers of Chemical Science and Engineering

ISSN 2095-0179

ISSN 2095-0187(Online)

CN 11-5981/TQ

邮发代号 80-969

2019 Impact Factor: 3.552

Frontiers of Chemical Science and Engineering  2020, Vol. 14 Issue (6): 937-947   https://doi.org/10.1007/s11705-019-1900-6
  本期目录
Room temperature oxidation of acetone by ozone over alumina-supported manganese and cobalt mixed oxides
Mehraneh Ghavami1, Mostafa Aghbolaghy1, Jafar Soltan1(), Ning Chen1,2
1. Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, S7N 5A9, Canada
2. Canadian Light Source Inc., University of Saskatchewan, Saskatoon, S7N 0X4, Canada
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Abstract

Volatile organic compounds (VOCs) are among the major sources of air pollution. Catalytic ozonation is an efficient process for removing VOCs at lower reaction temperature compared to catalytic oxidation. In this study, a series of alumina supported single and mixed manganese and cobalt oxides catalysts were used for ozonation of acetone at room temperature. The influence of augmenting the single Mn and Co catalysts were investigated on the performance and structure of the catalyst. The manganese and cobalt single and mixed oxides catalysts of the formula Mn10%-CoX and Co10%-MnX (where X= 0, 2.5%, 5%, or 10%) were prepared. It was found that addition of Mn and Co at lower loading levels (2.5% or 5%) to single metal oxide catalysts enhanced the catalytic activity. The mixed oxides catalysts of (Mn10%-Co2.5%) and (Mn10%-Co5%) led to acetone conversion of about 84%. It is concluded that lower oxidation state of the secondary metal improves ozone decomposition and oxidation of acetone.

Key wordsozone    VOC    manganese oxides    cobalt oxides    alumina support
收稿日期: 2019-05-29      出版日期: 2020-09-11
Corresponding Author(s): Jafar Soltan   
 引用本文:   
. [J]. Frontiers of Chemical Science and Engineering, 2020, 14(6): 937-947.
Mehraneh Ghavami, Mostafa Aghbolaghy, Jafar Soltan, Ning Chen. Room temperature oxidation of acetone by ozone over alumina-supported manganese and cobalt mixed oxides. Front. Chem. Sci. Eng., 2020, 14(6): 937-947.
 链接本文:  
https://academic.hep.com.cn/fcse/CN/10.1007/s11705-019-1900-6
https://academic.hep.com.cn/fcse/CN/Y2020/V14/I6/937
Fig.1  
Catalyst Mn and Co loading /wt-% SBET /(m2?g–1) Pore volume /(cm3?g−1)
Mn Co
g-Al2O3 220 0.61
Mn/g-Al2O3 10 200 0.56
Mn-Co/g-Al2O3 10 2.5 186 0.54
Mn-Co/g-Al2O3 10 5 178 0.53
Mn-Co/g-Al2O3 10 10 180 0.49
Co/g-Al2O3 10 210 0.59
Co-Mn/g-Al2O3 2.5 10 194 0.55
Co-Mn/g-Al2O3 5 10 183 0.52
Co-Mn/g-Al2O3 10 10 174 0.47
Tab.1  
Fig.2  
Catalyst Mn2O3
particle size /nm
Mn
dispersion /%
Co3O4
particle size /nm
Co
dispersion /%
Mn10%/g-Al2O3 18 7
Mn10%-Co2.5%/g-Al2O3 26 5 Na) Na)
Mn10%-Co5%/g-Al2O3 20 7 13 5
Mn10%-Co10%/g-Al2O3 23 6 9 7
Co10%/g-Al2O3 14 4
Co10%-Mn2.5%/g-Al2O3 Na) Na) 21 3
Co10%-Mn5%/g-Al2O3 18 7 12 5
Co10%-Mn10%/g-Al2O3 18 7 12 5
Tab.2  
Fig.3  
Catalyst Mn3O4 /% Mn2O3 /% MnO2 /% CoO /% Co3O4 /%
Mn10%/g-Al2O3 7 82 11
Mn10%-Co2.5%/g-Al2O3 20 80 0 45 55
Mn10%-Co5%/g-Al2O3 16 84 0 44 56
Mn10%-Co10%/g-Al2O3 7 85 8 16 84
Co10%/g-Al2O3 100
Co10%-Mn2.5%/g-Al2O3 69 29 2 100
Co10%-Mn5%/g-Al2O3 54 44 2 2 98
Co10%-Mn10%/g-Al2O3 27 73 0 3 97
Tab.3  
Fig.4  
Catalyst Acetone oxidation rate
/(×105 mol?min1?g-1)
Ozone decomposition rate
/(×105 mol?min1?g-1)
COx yield /%
Mn10%/g-Al2O3 1.57 11.26 91.31
Mn10%-Co2.5%/g-Al2O3 1.98 17.01 90.41
Mn10%-Co5%/g-Al2O3 1.98 17.34 90.53
Mn10%-Co10%/g-Al2O3 1.25 9.07 92.98
Co10%/g-Al2O3 1.15 8.00 95.71
Co10%-Mn2.5%/g-Al2O3 1.76 12.16 88.21
Co10%-Mn5%/g-Al2O3 1.35 7.60 91.48
Co10%-Mn10%/g-Al2O3 1.21 5.39 96.58
Tab.4  
Fig.5  
Fig.6  
Fig.7  
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