Al-TS-1的合成及催化氧化性能
Synthesis and catalytic oxidation performance of Al-TS-1
申璐 1邓秀娟 1刘月明1
作者信息
- 1. 华东师范大学化学系,上海市绿色化学与化工过程绿色化重点实验室,上海200062
- 折叠
摘要
系统研究了Al掺杂TS-1 (Al-TS-1)分子筛的合成及其催化氧化性能,采用X射线衍射、紫外-可见光谱、电感耦合等离子体发射光谱、扫描电镜、27Al和29Si固体核磁共振等手段对Al-TS-1样品进行了表征.结果表明,在合成过程中,Al的引入会影响TS-1中骨架Ti的形成,但当Al含量低于一定值(Al/Si≤0.005)时,其影响很小.Al-TS-1中骨架Al和骨架Ti均不对其相应的酸催化和催化氧化作用产生影响.骨架Al抑制了Al-TS-1在碱性应用体系中的与Ti相邻Si的溶脱,从而保护了骨架Ti活性中心.
Abstract
The preparation of titanium silicalite-1 (TS-1) containing Al (Al-TS-1) and its catalytic oxidation properties were investigated systematically.The features of Al-TS-1 were characterized using X-ray diffraction,ultraviolet-visible spectroscopy,inductively coupled plasma atomic emission spectroscopy,27Al magic-angle spinning and 29Si magic-angle spinning nuclear magnetic resonance spectroscopies,and scanning electron microscopy.The results showed that incorporation of Al into the TS-1 framework influences the amount of framework Ti in Al-TS-1.However,when the Al/Si ratio is lower than 0.005,the amount of framework Ti in Al-TS-1 is hardly affected.Neither the Al centers nor the Ti centers in the Al-TS-1 framework influence the acidic catalytic and catalytic oxidation performance.Al in the Al-TS-1 framework suppressed desilication of silica species adjacent to framework Ti species in Al-TS-1 in a basic catalytic system,so Ti active sites in the Al-TS-1 framework could be protected.
关键词
铝掺杂TS-1分子筛/合成/氧化/溶硅/肟化Key words
Al-TS-1 zeolite/Synthesis/Epoxidation/Desilication/Ammoximation引用本文复制引用
基金项目
出版年
2013
NETL
NSTL
维普
万方数据