| 钒钛催化剂制备工艺参数对其表面结构与催化性能的影响 |
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| 引用本文： | 唐爱东,向辉,王朵,何曦,杨华明,柯轲. 钒钛催化剂制备工艺参数对其表面结构与催化性能的影响[J]. 武汉科技大学学报(自然科学版), 2011, 34(6) |
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| 作者姓名： | 唐爱东 向辉 王朵 何曦 杨华明 柯轲 |
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| 作者单位： | 1. 中南大学化学化工学院 湖南长沙 410083
2. 中南大学资源加工与生物工程学院 湖南长沙 410083 |
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| 基金项目： | 国家科技支撑计划资助项目,中南大学大学生创新性实验计划资助项目 |
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| 摘 要： | 研究V2 O5/TiO2催化剂的制备工艺,如载钒量、煅烧时间、助催化剂和浸渍次数等,对催化剂表面结构及催化分解气相邻二氯苯的影响.采用漫反射紫外光谱(DRUVS)、X射线衍射(XRD)、BET等方法对催化剂进行表征.结果表明,随着载钒量的增大,催化剂表面活性物质含量增多,催化性能增强;延长煅烧时间会导致催化剂的团聚增加、比表面积减少,但有利于催化剂表面生成低聚态活性钒和V4+,从而提高其催化活性;添加助催化剂WO3和采用多次浸渍均能抑制活性钒的团聚,促进表面低聚态活性钒的分散;单聚和低聚钒酸盐是VOx/TiO2催化剂的活性物质,而高聚钒对催化分解气相邻二氯苯有抑制作用.
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| 关 键 词： | 钒钛催化剂 制备工艺 催化燃烧 邻二氯苯 |
Effect of preparation processes of vanadium-titanium catalyst on its surface structure and catalytic property |
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| Tang Aidong,Xiang Hui,Wang Duo,He Xi,Yang Huaming,Ke Ke. Effect of preparation processes of vanadium-titanium catalyst on its surface structure and catalytic property[J]. Journal of Wuhan University of Science and Technology(Natural Science Edition), 2011, 34(6) |
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| Authors: | Tang Aidong Xiang Hui Wang Duo He Xi Yang Huaming Ke Ke |
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| Affiliation: | Tang Aidong1,Xiang Hui1,Wang Duo1,He Xi2,Yang Huaming2,Ke Ke1 (1.School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China,2.School of Minerals Processing and Bioengineering,China) |
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| Abstract: | The effect of preparation processes of the vanadium-titanium catalyst such as vanadium content,calcination time,additive and number of impregnation times on the catalyst's surface structure and property for catalytic combustion of o-dichlorobenzene were investigated.The catalyst was characterized by means of diffuse reflectance UV spectroscopy(DRUVS),X-ray diffraction spectrum(XRD) and the BET technique.The results show that the active sites on the surface of the catalyst increase with the increase in V loa... |
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| Keywords: | V2O5/TiO2 catalyst preparation process catalytic combustion o-dichlorobenzene |
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