| 王希涛,钟顺和.超细Fe-V-O催化剂的制备、表征及其吸附性能[J].分子催化,2003,(3):173-177 |
| 超细Fe-V-O催化剂的制备、表征及其吸附性能 |
| Preparation and Characterization of Ultrafine Fe-V-O Complex Oxide Catalyst |
| 修订日期：2002-10-31 |
| DOI： |
| 中文关键词: 溶胶－凝胶法 共沉淀法 Fe－V－O催化剂 乙烷 |
| 英文关键词:Sol-gel method,co precipitation method,Ultrafine Fe VO particle,Ethane |
| 基金项目:国家自然科学基金 ( 2 9773 0 3 1)，国家重大基础研究前期专项 ( 2 0 0 1CCA0 3 60 0 ) |
| 王希涛 钟顺和 |
天津大学化工学院一碳化学与化工国家重点实验室 天津300072
(王希涛)
，天津大学化工学院一碳化学与化工国家重点实验室 天津300072(钟顺和)
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| 中文摘要: |
| 分别采用共沉淀法和溶胶-凝胶法制备了Fe-V-O催化剂，用DTA-TG、TEM、XRD、IR和TPR等方法对微粒的组成、表面结构及晶格氧活性进行了表征．用化学吸附-IR和TPD方法考察了乙烷在Fe-V-O催化剂表面上的吸附性能．结果表明：溶胶-凝胶法制备的Fe-V-O催化剂为超细微粒，粒子大小为10-20nm，其比表面、晶格氧的活泼性均大于共沉法制备的Fe-V-O催化剂．乙烷能够以-CH3中的H原子吸附于催化剂表面Lewis碱位V＝O链的端氧上形成两种分子吸附态，随吸附温度的升高，乙烷的吸附强度逐渐增大，其乙烷吸附量远大于共沉法制备的Fe-V-O催化剂． |
| 英文摘要: |
| Fe V O catalysts were prepared by the co precipitation and sol gel me thods. The composition, structure and chemisorption to ethane on the Fe V O c ata lysts were characterized by DTA TG, TEM, XRD, BET, IR, TPD MS and TPR tec hniques . The results showed that the Fe V O catalyst prepared by sol gel method cons ist s of well distributed ultrafine particles, which has a higher specific surface a rea and lattice oxygen activity than that prepared by the co precipitation meth o d. C -2H -6 can adsorb on the V=O of surface to form a molecular adsorption st ate, a nd the adsorption ability increases with the rising of the temperature. Moreover , the adsorption amount and intensity of ethane on Fe V O catalyst prepared b y s ol gel method are greater than that on Fe V O catalyst prepared by the co pr ecipitation method. |
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