锐钛矿制备钛硅分子筛ETS-10及其表征分析

研究了在无氟离子条件下以锐钛矿为钛源,硅酸钠为硅源,以水热法制备钛硅分子筛ETS-10的合成工艺,采用XRD、扫描电镜、热重分析、氮气吸附-脱附等不同分析方法对制备的ETS-10的形貌及性质进行表征分析.结果表明,产物中ETS-10的结晶度良好、成规则的截菱锥形,颗粒大小均匀,为微孔结构,孔径分布均匀,约为0.7 nm,BET比表面积和孔容较大,分别为333 m2/g和0.21 cm3/g.本实验制备的ETS-10含有少量的未反应锐钛矿杂质,但其对CO2,CH4及N2的吸附性能与传统法制得的ETS-10相似,且产物对CO2/N2的吸附选择性较高,可应用于烟道气中CO2的分离和回收.

Synthesis and Characterization of Titanium Silicalite Zeolite ETS-10 Using Anatase

The synthesis process of titanium silicalite zeolite ETS-10 using commercial anatase and Na2SiO3 without the addition of fluoride ions was investigated.The synthesized ETS-10 was characterized by X-ray diffraction,scanning electron microscopy,thermogravimetric and N2 adsorption-desorption.The results showed that the prepared ETS-10 exhibits high BET surface area and pore volume of 333 m2/g and 0.21 cm3/g,respectively.ETS-10 is well crystallined with the morphology of truncated bipyramid and uniform particle size.The microporous structure with a uniform pore size of 0.7 nm is observed.Although the prepared ETS-10 contains a small amount of unreacted anatase,it shows similar adsorption performances in comparison with the common ETS-10.It also could be an effective adsorbent for CO2 capture from the flue gas stream due to the high selectivity of CO2/N2.