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以过渡金属氧化物CuO为主活性组分,通过对ZrO2的复合和掺入电子助剂CeO2的考察,研制出适用于催化湿式氧化处理高浓度对氯苯基异氰酸酯生产废水的复合催化剂。在固定床鼓泡式反应器连续反应装置上对废水进行处理,考察了各组分浸渍液浓度、焙烧温度、焙烧时间等制备条件对催化剂的催化活性的影响,确定了最佳制备条件。结果表明:优化制备的CuO-ZrO2-CeO2/TiO2催化剂,用于处理高浓度对氯苯基异氰酸酯生产废水时具有较好的催化活性,在反应温度T=240℃,反应压力P=6.5MPa,空速=2.0h-1,V(气)∶V(水)=230∶1,进水pH=8条件下CODcr去除率达到96.9%,而在相同反应条件下未加催化剂的湿式氧化CODcr去除率只有40.8%。
The transition metal oxide CuO as the main active component, through the ZrO2 compound and the incorporation of electronic additives CeO2 investigation, developed suitable for catalytic wet oxidation of high concentrations of p-chlorophenyl isocyanate wastewater composite catalyst. The wastewater was treated in continuous reactor of bubbling reactor in a fixed bed. The effects of preparation conditions such as impregnation solution concentration, calcination temperature and calcination time on the catalytic activity of the catalyst were investigated. The optimum preparation conditions were determined. The results showed that the optimized CuO-ZrO2-CeO2 / TiO2 catalyst had good catalytic activity for the treatment of high concentration p-chlorophenyl isocyanate wastewater. Under the conditions of reaction temperature T = 240 ℃, reaction pressure P = 6.5MPa, The removal rate of CODcr reached 96.9% under the condition of V (water) = 230: 1, water velocity = 2.0h-1, V Only 40.8% rate.