Deactivation effects of Pb(II) and sulfur dioxide on a γ-MnO2 catalyst for combustion of chlorobenzene.
J Colloid Interface Sci
; 559: 96-104, 2020 Feb 01.
Article
em En
| MEDLINE
| ID: mdl-31622818
ABSTRACT
Mn-based catalysts are extensively used; herein, the poisoning mechanism of Pb2+ and SO2 on the γ-MnO2 catalyst during the combustion of chlorobenzene (CB) was studied. The oxidizability/reducibility, surface acidity and water activation property of the Pb/SO42- modified γ-MnO2 were analyzed by using XPS, H2-TPR/O2-TPD, NH3-TPD/Pyridine-IR and H2O-TPD. Catalytic performance and byproduct selectivity towards CB combustion were explored, indicating that Pb2+ and SO2 both impacted CB conversion and CO2 selectivity as indicated by the loss of oxidation properties and surface acidity. Analysis of the byproducts showed that Pb2+ and SO2 induced the formation of more toxic polychlorinated byproducts, thereby introducing new secondary environmental pollution risks.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Colloid Interface Sci
Ano de publicação:
2020
Tipo de documento:
Article