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A heterogeneous sono-catalytic system with addition of hydrogen peroxide (U SH2 O2 + Cat .) was employed for the degradation of 200 ppm of p-chlorophenol (4-CP) at 25 °C and 100 W of ultrasound power. One thousand and six hundred parts per million of initial hydrogen peroxide (H2O2) concentration and 1 g/L of catalyst loading over three heterogeneous copper catalysts, CuO, Cu/Al2O3 (Cu/Al) and CuO·ZnO/Al2O3 (Cu/Zn) was used. The benefits of ultrasound in a heterogeneous catalytic system were evaluated. A considerable synergistic effect of the U SH2 O2 + Cat . system was only achieved with supported catalysts (Cu/Al and Cu/Zn) possibly due to good dispersion of catalysts as a result of catalyst size reduction during ultrasound irradiation. Moreover, between the two supported copper catalysts, the Cu/Al provided promising catalytic performance by giving higher 4-CP and TOC removal accompanied with efficient H2O2 consumption. Experiments with a homogeneous copper catalyst revealed that use of ultrasound in a homogeneous system shows an adverse effect on decomposition of 4-CP. © 2007 Elsevier B.V. All rights reserved.
Author(s): Kim JK, Martinez F, Metcalfe IS
Publication type: Article
Publication status: Published
Journal: Catalysis Today
Year: 2007
Volume: 124
Issue: 3-4
Pages: 224-231
ISSN (print): 0920-5861
ISSN (electronic): 1873-4308
Publisher: Elsevier BV
URL: http://dx.doi.org/10.1016/j.cattod.2007.03.040
DOI: 10.1016/j.cattod.2007.03.040
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