Ce改性CuO/γ-Al_2O_3的稳定性及催化活性研究  

STUDY ON THE STABILITY AND ACTIVITY OF CuO/γ-Al_2O_3 IMPROVED BY Ce

作　　者：田海燕[1] 孙晓君[1,2] 万家锋 王虹[1] 魏金枝[1] 李佩瑾[1] 

机构地区：[1]哈尔滨理工大学化学与环境工程学院 [2]哈尔滨工程大学化工学院哈尔滨150001 [3]黑龙江大学化工学院

出　　处：《科技导报》2005年第4期59-61,共3页Science & Technology Review

基　　金：黑龙江省博士后基金资助项目

摘　　要：以CeO2作为改性添加剂、γ-Al2O3为载体、CuO为活性成分,用分层浸渍的方法制备出负载型CuO-CeO2/γ-Al2O3湿式氧化催化剂;采用TG-DTA、XRD对其进行表征,研究了Ce的掺杂对载体及活性成分高温稳定性的影响并得出结论:在湿式氧化反应过程中,Ce的掺杂有效抑制了γ-Al2O3向α-Al2O3转变的高温相变,以及活性成分CuO与载体间相互作用形成CuAl2O4的过程。通过对苯酚的湿式氧化降解实验,获知CeO2的加入可明显提高催化剂活性,其中6%CuO-6%CeO2/γ-100%Al2O3的质量组分比对苯酚的催化活性最佳,反应30min,苯酚溶液COD的去除率为91.31%。The three-element catalyst CuO- CeO2/γ-Al2O3 was prepared by layering and mixing impregnation method, in which CeO2 was chosen as the aids, γ-Al2O3 as the substrate, CuO as the active component. TD-DTA and XRD was carried out to investigate the effect of Ce on the stability of the substrate and the activated substance, CuO at high temperature. The results showed that the doping of Ce restrained effectively the phase change of substrate from γ-Al2O3 to α-Al2O3 and the formation of CuAl2O4 , which was produced by the reaction between CuO and Al2O3 during the process of wet air oxidation. The degradation experiment of phenol wastewater showed the doping of Ce can improve the activity of catalyst well. The catalyst with Cu∶Ce∶γ-Al2O3=6∶6∶100 (mass percentage) has the highest catalytic activity among them, the COD removal efficiency of which can reach 91.31% in 30 minutes.

关 键 词：CUO/Γ-AL2O3 活性研究 Α-AL2O3 CEO2 活性成分 改性添加剂 氧化催化剂 高温稳定性 催化剂活性 CEO2 反应过程 相互作用 氧化降解 催化活性 苯酚溶液 载体 负载型 DTA XRD 去除率 COD 湿式 掺杂 

分 类 号：X703.1[环境科学与工程—环境工程]