Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 166, Issue -, Pages 393-405Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2014.10.047
Keywords
1,2-Dichlorobenzene; Catalytic combustion; Manganese; Cobalt; Spinel
Funding
- Development Program for National Natural Science Foundation of China [21277047, 21477036, 21307033]
- Commission of Science and Technology of Shanghai Municipality [11JC1402900]
- Opening Project of Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Chinese Academy of Sciences [NRNE-OP2012001]
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Mn-modified Co3O4 catalysts with spinel structure with various Co/Mn ratios prepared by co-precipitation method were characterized by XRD, Raman, TEM, HRTEM, XPS and H-2-TPR, and used in catalytic combustion of 1,2-dichlorobenzene (o-DCB), as a model of dioxins. The results revealed that the catalyst with Co/Mn ratio of nine presented the highest activity with T-90 of 347 degrees C and high stability at least 35h at 3000 ppm o-DCB and 10% O-2 at GHSV = 15,000 h(-1). High activity could be ascribed to synergetic effect between activation of o-DCB on Co2+ sites and oxidation by surface active oxygen from Co3O4 nano-particles. Additionally, 1,2,4-trichloro-benzene was formed over Co3O4 to a significant extent through the reaction of adsorbed Cl species with o-DCB, while the incorporation of Mn in Co3O4 can effectively retard chlorination of o-DCB. A possible reaction pathway for the catalytic combustion of o-DCB on CoxMny catalysts was also investigated by in situ FTIR spectroscopy. (C) 2014 Published by Elsevier B.V.
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