SHENGDan-na,SUNJing-tong,ZOUJin-ru,et al.Efficiency of Cyclohexanone Oxime Wastewater Treatment by Honeycomb CH-Al-Cu Monolithic Continuous Catalytic Ozonation Process[J].China Water & Wastewater,2025,41(1):25-31.
Efficiency of Cyclohexanone Oxime Wastewater Treatment by Honeycomb CH-Al-Cu Monolithic Continuous Catalytic Ozonation Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第1期
Page:
25-31
Column:
Date of publication:
2025-01-01
- Keywords:
- catalytic ozonation; integral catalyst; continuous flow; cyclohexanone oxime; catalyst laying position; ·OH
- Abstract:
- The current situation of integral catalysts preparation and their continuous operational effectiveness are critical aspects in catalytic ozonation applications. The monolithic CH-Al-Cu catalyst was prepared using honeycomb ceramic (CH) as catalyst carrier, γ-Al2O3 as coating material, and copper (Cu) as active component. The performance of CH-Al-Cu catalyst in continuous flow catalytic ozonation process was evaluated by adjusting operating parameters. The results of catalyst characterization showed that γ-Al2O3 coating increased the specific surface area of the catalyst from 2.478 m2/g to 21.657 m2/g, and the Cu element in CH-Al-Cu catalyst existed on the surface mainly in the form of CuO after calcination, where Cu content was as high as 48.40%. CH-Al-Cu showed excellent catalytic ozonation activity in the continuous flow reactor. The optimal operating parameters were 18.6 mg/L of ozone concentration, 35 min of HRT, and the best laying position of catalyst was set at the bottom with 2 layers (40 g). Under these conditions, the removal rate of cyclohexanone oxime reached 95.3%, the removal rate of COD was 39.3%, which was 3.2 times that of ozone alone. The O/C of catalytic oxidation system was 1.1, which could greatly reduce the cost of ozone consumption. CH-Al-Cu catalyst can promote ozone mass transfer and strengthen ·OH production, and has good cycle stability and wear resistance.
Last Update:
2025-01-01