Comparison of Efficiencies and Mechanisms of Catalytic Ozonation of Recalcitrant Petroleum Refinery Wastewater by Ce, Mg, and Ce-Mg Oxides Loaded Al2O3Reportar como inadecuado


Comparison of Efficiencies and Mechanisms of Catalytic Ozonation of Recalcitrant Petroleum Refinery Wastewater by Ce, Mg, and Ce-Mg Oxides Loaded Al2O3


Comparison of Efficiencies and Mechanisms of Catalytic Ozonation of Recalcitrant Petroleum Refinery Wastewater by Ce, Mg, and Ce-Mg Oxides Loaded Al2O3 - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1

State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum, Beijing 102249, China

2

Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI 96822, USA

3

Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI 96822, USA



These authors contributed equally to this work.





*

Author to whom correspondence should be addressed.



Academic Editors: Shaobin Wang and Xiaoguang Duan

Abstract The use of catalytic ozonation processes COPs for the advanced treatment of recalcitrant petroleum refinery wastewater RPRW is rapidly expanding. In this study, magnesium Mg, cerium Ce, and Mg-Ce oxide-loaded alumina Al2O3 were developed as cost efficient catalysts for ozonation treatment of RPRW, having performance metrics that meet new discharge standards. Interactions between the metal oxides and the Al2O3 support influence the catalytic properties, as well as the efficiency and mechanism. Mg-Ce-Al2O3 Mg-Ce-Al2O3-COP reduced the chemical oxygen demand by 4.7%, 4.1%, 6.0%, and 17.5% relative to Mg-Al2O3-COP, Ce-Al2O3-COP, Al2O3-COP, and single ozonation, respectively. The loaded composite metal oxides significantly increased the hydroxyl radical-mediated oxidation. Surface hydroxyl groups –OHs are the dominant catalytic active sites on Al2O3. These active surface –OHs along with the deposited metal oxides Mg2+ and-or Ce4+ increased the catalytic activity. The Mg-Ce-Al2O3 catalyst can be economically produced, has high efficiency, and is stable under acidic and alkaline conditions. View Full-Text

Keywords: petroleum refinery wastewater; catalytic ozonation; metal oxide; hydroxyl group petroleum refinery wastewater; catalytic ozonation; metal oxide; hydroxyl group





Autor: Chunmao Chen 1,†, Yu Chen 1,†, Brandon A. Yoza 2, Yuhao Du 1, Yuxian Wang 1, Qing X. Li 3, Lanping Yi 1, Shaohui Guo 1 and Qinghong Wang 1,*

Fuente: http://mdpi.com/



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