Fe salts as catalyst for the wet oxidation of o-chlorophenol |
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| Authors: | Xu Xin-hua He Ping Jin Jian Hao Zhi-wei |
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| Institution: | Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China. xhxu@hzcnc.com |
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| Abstract: | Catalytic wet air oxidation (CWAO) of o-chlorophenol in wastewater was studied in a stainless steel autoclave using four different Fe catalysts in the temperature range of 100-200 ℃. Experimental results showed that high rate of o-chlorophenol and CODcr (Chemical Oxygen Demand, mg/L) removal by CWAO was obtained at relatively low temperature and pressure. The catalysts Fe2(SO4)3, FeSO4, Fe2O3 and FeCl3 all exhibited high catalytic activity. More than 93.7% of the initial CODCr and nearly100% of o-chlorophenol were removed at 150 ℃ after 150 min with FeSO4 as catalyst. The CWAO of o-chlorophenol was found to be pseudo-first order reaction with respect to o-chlorophenol, with activation energy of 75.56 k J/mol in the temperature range of100-175 ℃. |
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| Keywords: | Fe o-chlorophenol Catalytic wet air oxidation Kinetic |
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