CeO2改性钌系催化剂的制备及催化降解氨氮废水的研究  

Study on Preparation and Catalytic Degradation Performance of Ru Catalysts Modified with CeO2 for Ammonia-nitrogen Waste Water

作　　者：王宗亮 卢军[1] 崔浩[1] 刘健 周皓 李世民 刘沁曦[1] 刘锋[1] WANG Zongliang;LU Jun;CUI Hao;LIU Jian;ZHOU Hao;LI Shimin;LIU Qingxi;LIU Feng(State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Kunming Institue of Precious Metals,Sino-Precious Metals Holding Co.Ltd.,Kunming 650106,China)

机构地区：[1]昆明贵金属研究所贵金属综合利用新技术国家重点实验室云南省贵金属新材料控股集团有限公司

出　　处：《贵金属》2019年第4期16-22,共7页Precious Metals

基　　金：昆明市科技计划项目(2015-1-G-01001)

摘　　要：以RuO2和CuO为活性组分和辅助活性组分,添加CeO2作为助剂,采用硝酸盐浸渍法负载在分子筛载体上,焙烧制备Ru-Cu-Ce复合催化剂。采用比表面分析仪(BET)、X射线衍射(XRD)和透射电子显微镜(TEM)等对催化剂进行表征,用静态实验评价氧化去除氨氮的催化性能。结果表明,Cu和Ce的添加能够提高Ru催化剂的性能,Ce可以抑制Cu的溶出损失。催化剂制备的最佳焙烧条件为300℃焙烧4.5 h。对200 mL初始浓度为205.8 mg/L的模拟氨氮废水,0.25%Ru-1%Cu-1%Ce催化剂常压氧化降解的最佳条件为:初始pH=10,温度80℃,30%双氧水添加量为处理水量的1/2000,氨氮去除率可达85.6%,催化剂重复使用7次性能无明显降低。The Ru-Cu-Ce composite catalysts were prepared by using RuO2 and CuO as active components and auxiliary active components,adding CeO2 as an auxiliary agent,and supporting on the molecular sieve by a nitrate impregnation method.The catalysts were characterized by specific surface analyzer(BET),X-ray diffraction(XRD),and transmission electron microscope(TEM).Static experiments were performed to evaluate the catalytic performance of oxidative removal of ammonia nitrogen.The results showed that the additions of Cu and Ce could improve the performance of Ru catalyst,and that Ce could suppress the dissolution loss of Cu.The best preparation conditions for the catalysts were calcined at 300℃for 4.5 h.For 200 mL simulated ammonia nitrogen wastewater with an initial concentration of 205.8 mg/L,the optimal conditions for the oxidative degradation of the 0.25%Ru-1%Cu-1%Ce catalyst at atmospheric pressure are:initial pH=10,temperature at 80℃,0.1 mL of 30%hydrogen peroxide.The ammonia nitrogen removal rate was up to 85.6%,and the catalyst performance had no significant reduction after reuseing 7 times.

关 键 词：催化剂 催化氧化 钌氧化物 改性 氨氮废水中 

分 类 号：O643.3[理学—物理化学]