摘要
采用催化臭氧氧化深度处理某石化厂炼油废水,制备了活性炭复合材料负载催化剂(Fe_2O_3/ACNT),与几种常见负载催化剂进行了物性和COD去除效果的对比,并对Fe_2O_3/ACNT的催化效果和稳定性进行了详细分析。结果表明:催化剂的催化臭氧氧化活性由高到低的顺序为Fe_2O_3/ACNT>Fe_2O_3/活性炭>Fe_2O_3/Al2O3>Fe_2O_3/陶粒;Fe_2O_3/ACNT催化剂具有较高的比表面积、孔体积、强度和吸水率,使COD去除率由单独臭氧氧化时的约20%提高到66.8%。在催化剂填充量200 m L、废水pH 7.6、臭氧投加量200 mg/L、体积空速1 h^(-1)的条件下运行30d,COD去除率平均达65.1%,出水COD均值为40.8 mg/L,最高值为44.3 mg/L,满足外排水COD小于50 mg/L的指标。催化剂稳定性良好,运行30 d活性未见明显降低,具有在环保领域应用的前景。
The petrochemical wastewater was treated by catalytic ozone oxidation.The activated carbon(AC)composite supported catalyst(Fe2O3/ACNT)was prepared and compared with several common supported catalysts on physical properties and COD removal effect.The catalytic effects and stability of Fe2O3/ACNT were analyzed.The results showed that:The order of catalytic ozone oxidation activity of the catalysts was Fe2O3/ACNT>Fe2O3/AC>Fe2O3/Al2O3>Fe2O3/ceramic;Because of the higher specific area,pore volume,strength and water absorption,Fe2O3/ACNT could increase the COD removal rate from about 20%of ozone oxidation alone to 66.8%;Under the conditions of catalyst loading 200 mL,wastewater pH 7.6,ozone amount 200 mg/L,space velocity 1 h-1 and running time 30 d,the average COD removal rate was 65.1%,the average effluent COD was 40.8 mg/L and the highest value was 44.3 mg/L,which met the drainage standard(COD≤50 mg/L).The catalyst had good stability without significant activity reduction in 30 d of operation,which showed a favorable application prospect in environmental protection.
作者
赵越
蒋广安
李宝忠
马传军
王雪清
Zhao Yue;Jiang Guangan;Li Baozhong;Ma Chuanjun;Wang Xueqing(Sinopec Fushun Research Institute of Petroleum and Petrochemicals,Fushun Liaoning 113001,China)
出处
《化工环保》
CAS
CSCD
北大核心
2018年第2期152-156,共5页
Environmental Protection of Chemical Industry
基金
中石化"十条龙"科技攻关项目(HB1509)
关键词
催化臭氧氧化
石化废水
活性炭
复合催化剂
catalytic ozone oxidation
petrochemical wastewater
activated carbon
composite catalyst
