| 鲁继青.Sn改性的Au/TS-1催化剂上丙烯气相环氧化反应研究[J].分子催化,2010,(6):0 |
| Sn改性的Au/TS-1催化剂上丙烯气相环氧化反应研究 |
| The Direct Gas-Phase Epoxidation of Propylene on Sn-modified Au/TS-1 Catalysts |
| 投稿时间：2010-09-29 修订日期：2010-10-18 |
| DOI： |
| 中文关键词: 环氧丙烷 丙烯环氧化 金催化剂 TS-1分子筛 Sn 改性 |
| 英文关键词:propylene oxide propylene epoxidation Au catalyst stannum modification |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 以Sn改性的TS-1分子筛为载体，利用沉积沉淀法制备了金催化剂，用于在氢气氧气共存下丙烯直接环氧化反应，并比较了不同Sn掺杂量对催化剂结构及其催化性能的影响。X射线衍射与红外光谱结果表明，Sn掺杂进入TS-1骨架中。反应活性结果表明，Sn的改性使催化剂上丙烯的转化率由1.6提高到2.5%，环氧丙烷的选择性由87上升到90%，活性的增加可能是由于Sn的掺入引起的配位效应 (ligand effect)。 |
| 英文摘要: |
| The direct propylene epoxidation in the presence of hydrogen and oxygen was studied over Au catalysts supported on a Sn-modified TS-1. The supported Au catalysts were prepared using the deposition-precipitation method. The effects of Sn contents on the structure and catalytic properties of catalysts were investigated. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopicresults showed that the Sn was incorporated into the struture of the TS-1. The presence of Sn in the catalyst resulted in an increment of C3H6 concersion from 1.6 to 2.5% and PO selectivity from 87 to 90%, which may be due to a ligand effect. |
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