Fe salts as catalyst for the wet oxidation of o-chlorophenol.
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 degrees C. Experimental results showed that high rate of o-chlorophenol and COD(Cr) (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 COD(Cr) and nearly 100% of o-chlorophenol were removed at 150 degrees C 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 kJ/mol in the temperature range of 100-175 degrees C.
Xu
Xin-hua
XH
Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China. xhxu@hzcnc.com
He
Ping
P
Jin
Jian
J
Hao
Zhi-wei
ZW
D002384:Catalysis; D002733:Chlorophenols / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification*; D007220:Industrial Waste / Q000517:prevention & control; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D010084:Oxidation-Reduction; D012492:Salts / Q000737:chemistry*; D012996:Solutions; D013696:Temperature; D018508:Water Purification / Q000379:methods*
D002733:Chlorophenols; D007220:Industrial Waste; D012492:Salts; D012996:Solutions; D007501:Iron; C030683:2-chlorophenol