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通过设计首次提出针对ITQ-13分子筛晶化促进剂的合成策略,ITQ-13分子筛.通过X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、N2吸附、原位红外(FTIR)及固体核磁(27Al NMR)等测试手段对ITQ-13分子筛的物化性能进行了表征,考察了晶化过程中结晶度的变化,得出了晶化过程的动力学参数,对晶化机理进行了探讨.结果表明:快速合成法与传统方法合成的ITQ-13分子筛具有相似的物化性能,并且可以合成含有更多骨架铝的ITQ-13分子筛;NO3-的加入通过极化憎水基团,加速SiOSi物质结合,降低ITQ-13分子筛的成核活化能以及生长活化能,从而可以提高晶化速率,缩短晶化时间至11 h.
The synthesis strategy of ITQ-13 molecular sieve crystallization promoter and ITQ-13 molecular sieve were first proposed through the design.All of the samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption, in situ infrared (FTIR) (27 Al NMR) were used to characterize the physico-chemical properties of ITQ-13 molecular sieve. The changes of crystallinity during the crystallization process were investigated. The kinetic parameters of the crystallization process were obtained and the crystallization mechanism was discussed. Results It shows that the rapid synthesis method has the same physical and chemical properties as the ITQ-13 molecular sieve synthesized by the conventional method and can synthesize the ITQ-13 molecular sieve containing more framework aluminum; the addition of NO3- accelerates the SiOSi material binding by polarization of hydrophobic groups , Reducing the nucleation activation energy and growth activation energy of ITQ-13 molecular sieve, which can increase the crystallization rate and shorten the crystallization time to 11 h.