Fe2O3-CeO2-Bi2O3/γ-Al2O3 catalyst in the catalytic wet air oxidation (CWAO) of cationic red GTL under mild reaction conditions

doi:10.1007/s11783-018-1025-z

Front. Environ. Sci. Eng.

2018, Vol. 12

Issue (1) : 8 https://doi.org/10.1007/s11783-018-1025-z

RESEARCH ARTICLE

Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃ catalyst in the catalytic wet air oxidation (CWAO) of cationic red GTL under mild reaction conditions

Pan Gao¹, Yuan Song¹, Shaoning Wang¹, Claude Descorme², Shaoxia Yang¹(

)

¹. National Engineering Laboratory for Biomass Power Generation Equipment, Beijing Key Laboratory of Energy Safety and Clean Utilization, School of Renewable Energy, North China Electric Power University, Beijing 102206, China
². Institute for Research on Catalysis and Environment of Lyon (IRCELYON), UMR5256 CNRS –Claude Bernard Lyon 1 University, Albert Einstein Avenue, 69626, Villeurbanne, France

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Abstract

Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃, an environmental friendly material, was investigated.

The catalyst exhibited good catalytic performance in the CWAO of cationic red GTL.

The apparent activation energy for the reaction was 79 kJ·mol⁻¹.

HO₂· and O₂·⁻ appeared as the main reactive species in the reaction.

The Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃ catalyst, a novel environmental-friendly material, was used to investigate the catalytic wet air oxidation (CWAO) of cationic red GTL under mild operating conditions in a batch reactor. The catalyst was prepared by wet impregnation, and characterized by special surface area (BET measurement), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃ catalyst exhibited good catalytic activity and stability in the CWAO under atmosphere pressure. The effect of the reaction conditions (catalyst loading, degradation temperature, solution concentration and initial solution pH value) was studied. The result showed that the decolorization efficiency of cationic red GTL was improved with increasing the initial solution pH value and the degradation temperature. The apparent activation energy for the reaction was 79 kJ·mol⁻¹. Hydroperoxy radicals (HO₂·) and superoxide radicals (O₂⁻·) appeared as the main reactive species upon the CWAO of cationic red GTL.

Keywords Catalytic wet air oxidation (CWAO) Advanced oxidation processes (AOPs) Iron oxide catalyst Industrial wastewater

Corresponding Author(s): Shaoxia Yang

Issue Date: 23 January 2018

Cite this article:

Pan Gao,Yuan Song,Shaoning Wang, et al. Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃ catalyst in the catalytic wet air oxidation (CWAO) of cationic red GTL under mild reaction conditions[J]. Front. Environ. Sci. Eng., 2018, 12(1): 8.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-018-1025-z
https://academic.hep.com.cn/fese/EN/Y2018/V12/I1/8

Tab.1 The structure of the catalysts

Fig.1 XRD patterns of the support and catalysts (a: γ-Al₂O₃, b: Fe₂O₃/γ-Al₂O₃, c: Fe₂O₃-CeO₂/γ-Al₂O₃,d: Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃)

Fig.2 XPS spectra of Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃catalyst

Fig.3 Decolorization efficiency of cationic red GTL in CWAO over the different catalysts under atmospheric pressure ([Dye]₀=100 mg·L⁻¹; [Catalyst]₀ =2.0 g·L⁻¹; [O₂]₀=200 mL·min⁻¹; T=70 ^oC)

Fig.4 Effect of initial pH value of cationic red GTL solution on the decolorization efficiency in the CWAO over the Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃ catalyst under atmospheric pressure ([Dye]₀=100 mg·L⁻¹; [Catalyst]₀=2.0 g·L⁻¹; [O₂]₀=200 mL·min⁻¹; T=70 ^oC)

Fig.5 Effect of reaction temperature on the decolorization efficiency of cationic red GTL in the CWAO over the Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃ catalyst under atmospheric pressure ([Dye]₀=100 mg·L⁻¹; [Catalyst]₀=2.0 g·L⁻¹; [O₂]₀=200 mL·min⁻¹)

Fig.6 Effect of the cationic red GTL concentration on the decolorization efficiency in the CWAO over the Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃ catalyst under atmosphere pressure ([Catalyst]₀=2.0 g·L⁻¹, [O₂]₀=200 mL·min⁻¹, T=70 ^oC)

Fig.7 Effect of scavenging agents on the decolorization efficiency of cationic red GTL in the CWAO over Fe₂O₃-CeO₂-Bi₂O₃/γ-Al₂O₃ catalyst under atmospheric pressure ([Dye]₀=100 mg·L⁻¹; [Catalyst]₀=2.0 g·L⁻¹; [O₂]₀=200 mL·min⁻¹; T=70 ^oC)

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