以四乙基氢氧化铵为模板并通过转晶法合成高硅铝比的SSZ⁃13沸石分子筛  

Synthesis of SSZ-13 Zeolite with High Molar Ratio of SiO2 to Al_(2)O_(3) by Crystal Transformation Method Using Tetraethyl Ammonium Hydroxide as Template

作　　者：刘效艳 王开学[2] LIU Xiao‑Yan;WANG Kai‑Xue(Shanghai Key Laboratory of Molecular Imaging,Shanghai University of Medicine and Health Sciences,Shanghai 201318,China;Shanghai Electrochemical Energy Devices Research Center,School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海健康医学院,上海市分子影像学重点实验室,上海201318 [2]上海交通大学化学化工学院,上海电化学能源器件工程技术研究中心,上海200240

出　　处：《无机化学学报》2021年第4期728-734,共7页Chinese Journal of Inorganic Chemistry

基　　金：上海健康医学院种子基金项目(No.E3-0200-20-201007-30)资助。

摘　　要：使用四乙基氢氧化铵为有机模板剂,以低硅铝比(nSiO2/nAl2O3)的Y分子筛为铝源,通过转晶法制备结晶度良好的SSZ‑13沸石分子筛。从凝胶配比方面考察了不同原料组成对分子筛合成的影响,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)及电感耦合等离子体(ICP)表征水热反应过程中的物相、形貌、硅铝比等变化,揭示分子筛合成过程。氨选择性催化还原(NH3‑SCR)反应显示该分子筛具有优异的催化活性,为其工业上的广泛应用提供了可能性。SSZ‑13 zeolite with good crystallinity was prepared by using tetraethyl ammonium hydroxide as organic template and Y zeolite with low molar ratio of SiO2 to Al2O3(nSiO2/nAl2O3)as aluminum source.The effect of different compositions of pre‑gels on the synthesis of SSZ‑13 was investigated,and the crystallinity,morphology and nSiO2/nAl2O3 in the process of hydrothermal reaction were characterized by X‑ray diffraction(XRD),scanning electron microscopy(SEM)and inductively coupled plasm(ICP)to reveal the synthesis mechanism of SSZ‑13.NH3 selective catalytic reduction(NH3‑SCR)of NOx shows that the SSZ‑13 catalysts with Cu loading(mass fraction of 3%)had excellent catalytic activity,which provides the possibility for its wide application in industry.

关 键 词：SSZ‑13沸石 四乙基氢氧化铵 Y分子筛 NH3‑SCR 

分 类 号：O643.3[理学—物理化学] P619.217[理学—化学]