Catalytic wet air oxidation of Aqueous solutions of substituted phenols

被引:30
作者
Posada, D [1 ]
Betancourt, P
Liendo, F
Brito, JL
机构
[1] Cent Univ Venezuela, Fac Ciencias, Escuela Quim, Ctr Catalisis Petroleo & Petroquim Los Chaguaramo, Caracas 40679, Venezuela
[2] PDVSA Intevep Gerencia Ecol & Ambiente, El Tambor, Edo Miranda, Venezuela
[3] Inst Venezolano Invest Cient, Ctr Quim, Altos De Pipe 1020A, Estado Miranda, Venezuela
关键词
Cu/CeO2; characterization; wet air oxidation; phenol; 2-dichlorophenol; p-nitrophenol;
D O I
10.1007/s10562-005-9195-2
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Catalytic wet air oxidation (CWAO) of aqueous solutions of phenol, 2-chlorophenol and 4-nitrophenol were studied using Cu/CeO2 with 4% of copper as catalytic material. The catalyst was prepared by an impregnation method and characterized by X-ray diffraction (XRD), BET surface area, oxygen storage capacity (OSC), temperature programmed reduction (TPR), electron paramagnetic resonance (EPR) and XPS. The reaction was carried out in a batch reactor at T=160 degrees C and 1.0 MPa. Cu/CeO2 catalyst was found effective in CWAO. On the basis of characterization data, it is suggested that the high activity of the copper-ceria catalyst is related to the modification of the structural and redox properties of the cerium oxide on copper addition. The ratio BOD5/COD was measured to evaluate the biodegradability. Pretreatment by CWAO under operating conditions resulted in effluents whose biodegradation rates were significantly higher than those of the original.
引用
收藏
页码:81 / 88
页数:8
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