负载型CeO_2催化臭氧氧化控制溴酸盐效能的稳定性  

Stability of Minimizing Bromate Formation by Catalytic Ozonation with Supported Cerium Oxide

作　　者：王启山[1] 王宏超[1] 于兴玥 王楚亚[1] 鲁金凤[1,2] 刘芳池[1] 朱光宇[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]环境污染过程与基准教育部重点实验室(南开大学),天津300071

出　　处：《天津大学学报（自然科学与工程技术版）》2015年第6期555-560,共6页Journal of Tianjin University：Science and Technology

基　　金：天津市应用基础及前沿技术研究计划资助项目(14JCYBJC22900);国家自然科学基金资助项目(51008162)

摘　　要：为明确催化臭氧氧化控制溴酸盐效能的稳定性，通过连续流实验，考察了负载型氧化铈催化臭氧氧化在长期运行过程中对溴酸盐生成量的控制效能，并对催化柱的床层高度、进水流量、臭氧投加量等条件对控制溴酸盐生成量稳定性的影响进行了研究．结果表明：一年中不同时间、不同季节，连续流负载型氧化铈催化氧化柱均能有效控制溴酸盐的生成量，且运行效果稳定可靠；不同反应条件下（催化柱床层高度为150～750mm，进水流量为50～400mL／min，臭氧投量为5．43—12．42mg／L），催化臭氧氧化都能明显抑制溴酸盐的生成；建议的最佳反应条件为床层厚度600mm、进水流量200mL／min，臭氧投加量采用中、低臭氧投量．The aim of this work was to investigate the stability of bromate minimization during the supported cerium oxide catalyzed ozonation（CeO2/O3）after long-term operation in continuous flow mode（CFM）. Catalyst bed thickness, inlet flow rate and ozone dosage were further studied on their effect on minimizing bromate formation during CeO2/O3 oxidation in CFM. Results show that CeO2/O3 oxidation can significantly reduce bromate formation at different times and different seasons of the year, meanwhile the operation is stable and reliable during long-term operation. CEO2/O3 oxidation also could significantly reduce bromate formation at all conditions applied in this experiment（i, e., catalyst bed thickness： 150-750 mm, inlet flow rate： 50-400 mL/min and ozone dosage： 5.43-12.42 mg/L）. The recommended optimum conditions are as follows： thickness of catalyst bed is 600 mm, inlet flow rate is 200 mL/min and the ozone dosage should be at low or medium level.

关 键 词：催化臭氧氧化 溴酸盐 稳定性 负载型氧化铈 催化床床层厚度 

分 类 号：X703.1[环境科学与工程—环境工程]