高浓度臭氧分解催化剂制备与性能研究
关键词：臭氧；催化剂；溶胶凝胶；催化性能；Cu-Mn
Abstract
In this paper, Cu-Mn catalyst for the Ozone degradation was prepared by sol-gel and co-precipitation methods relatively,. The super-fine Cu-Mn catalyst powder was coated to the Al-Si-O ceramic matrix trough the Al sol binder and the finial block specimen was shaped, which can steadily workd. A serries of measurement composed of XRD、SEM were employed to catalysis the microstructure and the morphology of the catalytic sites. The decomposition of indigo carmine was ultilized to probe the catalytic performance of Cu-Mn catalyst. The results indicated that, with co-precipitation method, the Cu-Mn sample dopped 5% Cu has improved the catalytic performance. Furthermore, XRD confirmed that the material was ascribed to Mn3O4, containing multiple states of Mn, which was facile to cause the ozone degrade. It was told from SEM that the particle distribution is much uniform with the average dimensation of 1um. The procedure to produce the catalyst possessed the property including low cost, low energy consumption, simplness, which are convenient for industrial production.
Keywords: ozone; Cu-Mn catalyst; sol-gel; catalytic properties;
目 录
1. 绪论 1
1.1 臭氧概述 1
1.2 臭氧分解的方法 2
1.2.1 活性碳法 2
1.2.2 热分解法 2
1.2.3 电磁波辐射分解法 2
1.2.4 药液吸收法 2
1.2.5 催化法分解臭氧 2
1.3 国内外催化分解臭氧的各类催化剂 3
1.3.1 含过度金属氧化物的臭氧分解催化剂 3
1.3.2 含贵金属的臭氧分解催化剂 4
1.3.3 含钛的臭氧分解催化剂 4
1.3.4 含锰催化剂[7-12] 4
1.4 含锰催化剂的制备方法 5
1.4.1 共沉淀法 5
1.4.2 浸渍法 5
1.4.3 分步浸渍法 5
1.5臭氧分解催化剂的活性 6
1.5.1 不同催化剂前体 6
1.5.2 煅烧温度 6
1.5.3 反应温度 6
1.5.4 湿度 6
1.5.5 臭氧浓度 7
1.6臭氧分解催化剂催化机理 7
1.6.1 低湿度条件下臭氧的催化分解机理 7
1.6.2 高湿度条件下臭氧的催化分解机理 7
1.7 选题思路 7
1.7.1 选题背景与意义 7
1.7.2 性能分析选择 8
1.7.3 具体流程思路 8
2. 实验部分 9
2.1 实验原料及实验仪器 9
2.2 实验步骤 10
2.2.1 溶胶凝胶法制备催化中心的制备 10
2.2.2 共沉淀制备催化中心 11
2.2.2 Al溶胶的制备 12
2.2.3 多孔陶瓷载体的制备 12
2.3 表征方法 13