| 预处理方法对钛硅沸石催化性能的影响 |
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| 引用本文： | 郭新闻,刘民,王祥生,李钢,陈永英,刘松. 预处理方法对钛硅沸石催化性能的影响[J]. 催化学报, 2001, 22(4): 370-372 |
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| 作者姓名： | 郭新闻 刘民 王祥生 李钢 陈永英 刘松 |
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| 作者单位： | 大连理工大学 |
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| 基金项目： | 国家自然科学基金，中国石油化工总公司资助项目，，29792071，， |
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| 摘 要： | 采用不同的介质（HCl－H2O2，NH4F－H2O2，HNO3－H2O2，H2SO4－H2O2）对钛硅沸石TS－1进行预处理，并用IR，XRD，UV－Vis，XRF和27AlMASNMR对样品进行了表征；以丙烯环氧化为探针反应，考察了样品的催化性能．结果表明，经预处理后，TS－1中的TiO2均被脱除约20％，而Al几乎未被脱除；所脱除的TiO2为非骨架钛；环氧丙烷的选择性降低，但H2O2的有效利用率明显升高．特别是采用NH4F－H2O2预处理时，H2O2的转化率和有效利用率均提高10％．
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| 关 键 词： | 钛硅沸石 预处理 盐酸 氟化铵 硝酸 硫酸 丙烯 环氧化 |
| 文章编号： | 0253-9837(2001)04-0370-03 |
| 收稿时间： | 2001-08-25 |
Effect of Pretreatment Methods on Catalytic Performance of Titanium Silicalite-1 |
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| GUO Xinwen ,LIU Min,WANG Xiangsheng,LI Gang,CHEN Yongying,LIU Song. Effect of Pretreatment Methods on Catalytic Performance of Titanium Silicalite-1[J]. Chinese Journal of Catalysis, 2001, 22(4): 370-372 |
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| Authors: | GUO Xinwen LIU Min WANG Xiangsheng LI Gang CHEN Yongying LIU Song |
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| Affiliation: | GUO Xinwen *,LIU Min,WANG Xiangsheng,LI Gang,CHEN Yongying,LIU Song |
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| Abstract: | Titanium silicalite-1 (TS-1) was pretreated by solution of HCl-H 2O 2,NH 4F-H 2O 2,HNO 3-H 2O 2 or H 2SO 4-H 2O 2. The pretreated samples were characterized by IR, XRD, UV-Vis, XRF and 27 Al MAS NMR and evaluated by epoxidation of propylene with H 2O 2. The results showed that almost all Na + and about 20% of TiO 2 are removed from TS-1 after pretreatment. The TiO 2 removed from TS-1 is extra-framework titanium species. After pretreatment, the selectivity for PO decreases, and the utilization of H 2O 2 increases obviously. Concerning the utilization and the conversion of H 2O 2, the pretreatment method with NH 4F-H 2O 2 is the best one. |
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| Keywords: | titanium silicalite-1 pretreatment hydrochloric acid ammonium fluoride nitric acid sulphuric acid propylene epoxidation |
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