纳米级钛硅分子筛合成及其催化乙烯制乙二醇性能
Synthesis of nanoscale titanium silicalite molecular sieve and its catalytic performance for ethylene to ethylene glycol
王漫云 1刘涛 1潘志爽 1吕鹏刚 1赵鸣芝 1蔡进军 1段宏昌 1何涛2
作者信息
- 1. 中国石油石油化工研究院兰州化工研究中心,甘肃兰州 730060
- 2. 中国石油云南石化有限公司生产一部,云南安宁 650399
- 折叠
摘要
以四丙基氢氧化铵为模板剂,钛酸四丁酯为Ti源,硅酸四乙酯(TEOS)、钠型硅溶胶或铵型硅溶胶分别为Si源,通过水热晶化法制备出一系列钛硅分子筛(TS-1),利用X射线衍射仪、自动物理吸附仪、荧光光谱仪、傅里叶红外光谱仪、扫描电子显微镜、紫外可见分光光度计等仪器对合成的样品进行了表征,考察了 Ti源引入温度、Si源种类、晶化时间以及硅钛比[n(Si)/n(Ti),下同]对合成TS-1的影响,并对比评价了系列TS-1催化乙烯制乙二醇(EG)的性能.结果表明:在常温下引入Ti源,选择TEOS作Si源,晶化时间为1 d,硅钛比为50的条件下所合成TE-50 N-1样品的催化性能最优,H2O2转化率为80.04％,EG选择性为97.19％.
Abstract
A series of titanium silicalite molecular sieves(TS-1)were prepared by hydrothermal crys-tallization method by using tetrapropylammonium hydroxide as template,tetrabutyl titanate as Ti source,tetraethyl orthosilicate(TEOS),sodium sil-ica sol or ammonium silica sol as the Si sources,re-spectively.The synthesized samples were character-ized by X-ray diffractometer,automatic physical adsorption instrument,fluorescence spectrometer,Fourier transform infrared spectrometer,scanning electron microscope and ultraviolet-visible spec-trophotometer.The effects of Ti source introduction temperature,Si source type,crystallization time and Si/Ti ratio[n(Si)/n(Ti),the same below]on the syn-thesis of TS-1 were investigated,and the catalytic performance of a series of TS-1 for ethylene to ethy-lene glycol(EG)was compared and evaluated.The results showed that the TE-50 N-1 sample synthe-sized under the conditions of introducing Ti source at room temperature,selecting TEOS as Si source,crystallization time of 1 d,and Si/Ti ratio of 50 had the best catalytic performance,with H2O2 conversion rate of 80.04％and EG selectivity of 97.19％.
关键词
钛硅分子筛/硅酸四乙酯/催化氧化/乙烯/乙二醇/选择性Key words
titanium silicalite molecular sieve/te-traethyl orthosilicate/catalytic oxidation/ethylene/ethylene glycol/selectivity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据