Ni_2O_3-MnO_2-CeO_2/γ-Al_2O_3非均相催化剂的制备、表征及其催化性能  

Preparation Characterization and Performance of Ni_2O_3-MnO_2-CeO_2/γ-Al_2O_3 Heterogeneous Catalysts

作　　者：吴正雷[1] 曹子燚[1] 张帆[1] 唐永明[1,2] 

机构地区：[1]南京工业大学理学院,江苏南京210009 [2]材料化学工程国家重点实验室,江苏南京210009

出　　处：《石油化工》2013年第9期1028-1034,共7页Petrochemical Technology

基　　金：材料化学工程国家重点实验室的资金(KL12-10)支持

摘　　要：以γ-Al2O3为载体,采用浸渍法制备了负载型Ni2O3-MnO2-CeO2/γ-Al2O3非均相催化剂,通过TG-DSC,XRD,SEM等手段对催化剂的物化性质、晶相结构和表面形貌进行了表征;同时考察了反应体系的pH、有效氯含量、反应温度和催化剂负载量对催化剂催化分解NaClO活性的影响。实验结果表明,催化剂适宜的煅烧温度为450℃;反应体系为中性或弱酸性及较高的有效氯含量和反应温度都有助于催化分解NaClO。正交实验结果表明,Ni2O3,MnO2,CeO2的负载量(w)分别为35%,6%,2%时催化剂催化分解NaClO的效果最好,分解率达83.49%,且催化剂的稳定性良好,再生后可恢复活性。在处理有机废水的实验中,使用Ni2O3-MnO2-CeO2/γ-Al2O3催化剂,COD去除率达73.34%。Supported Ni2O3-MnO2-CeO2/γ-Al2O3 catalysts were prepared by an immersion method with γ-Al2O3 as support and were characterized by means of TG-DSC,XRD and SEM.The effects of pH,available chlorine content,reaction temperature and active component loading on the performances of the catalysts in the decomposition of sodium hypochlorite were investigated.The results showed that suitable calcination temperature for the catalysts was 450 ℃,and neutral or weak acidic reaction system,high available chlorine content and high temperature were beneficial to the decomposition.Orthogonal experiments indicated that the decomposition rate of sodium hypochlorite reached the highest 83.49％ when the active component loadings in the catalyst were 35％（w）Ni2O3,6％（w）MnO2 and 2％（w）CeO2.The removal rate of COD in organic waste water reached 73.34％ by using the Ni2O3-MnO2-CeO2/γ-Al2O3 catalyst.

关 键 词：氧化镍-二氧化锰-氧化铈 γ-氧化铝催化剂 催化氧化 次氯酸钠 有效氯 

分 类 号：TQ426[化学工程]