报道了一种新型复合分子筛L/W的制备、表征及应用.采用X射线衍射( XRD)、扫描电子显微镜( SEM)、红外光谱( IR)、氮气吸附-脱附、吡啶红外光谱( Py-IR)、氢气程序升温还原( H2-TPR)及拉曼光谱( Raman)等手段系统地比较了复合分子筛与机械混合分子筛的差异.结果表明，机械混合分子筛中的L和W分子筛均以独立相存在，而复合分子筛中L分子筛是部分生长在W分子筛之上的；并且复合分子筛表现出了更大的比表面积和孔径以及更适宜的酸性分布，这有利于反应物的扩散，增强了B酸与L酸的协同效应.在催化裂化反应中，复合分子筛催化剂比机械混合分子筛催化剂具有更高的脱硫活性(脱硫率93.3%)以及更低的辛烷值损失(驻RON=-1.15).

A novel L/W composite zeolite was synthesized via the in situ overgrowth of L zeolite on W zeolite and the corresponding physical-chemical property was characterized by means of X-ray diffraction ( XRD ), scanning electron microscopy( SEM), Fourier transformed infrared( FTIR) spectrometry, N2 adsorption, infra-red spectroscopy of adsorbed pyridine, Raman and H2-TPR. The results were compared with those of the me-chanical mixture composed of the individual L zeolite and W zeolite. In the mechanical mixture, the L zeolite phase was morphologically separated from the W zeolite phase, while the L/W composite zeolite existed in a form of a epitaxial growth structure, with the W zeolite phase as the core and the L zeolite phase as the shell. Compared with the mechanical mixture, the composite had more appropriate pore structure and moderate aci-dity distribution, which could accelerate the diffusion of reactants and enhance the synergetic effect between Br?nsted and Lewis acids. Th

以Beta分子筛为硅源通过水热合成法合成了SAPO-11/Beta复合分子筛,采用X射线衍射、N2物理吸脱附、扫描电镜、透视电镜-能谱分析、固体核磁及吡啶红外等方法对单分子筛、复合分子筛和机械混合分子筛的物化性质进行了表征.以正十二烷为模型化合物,在固定床反应器上考察了铂负载型分子筛催化剂的异构化性能.结果表明,复合分子筛的物理化学性质明显不同于单分子筛和机械混合分子筛,其呈现核壳结构,SAPO-11和Beta间存在化学作用,使得复合分子筛具有适宜的B酸分布.在正十二烷异构化反应中,复合分子筛催化剂的异构化性能优于单分子筛催化剂和机械混合分子筛催化剂,多支链异构体收率高.

The SAPO-11/Beta composite molecular sieve was synthesized by the hydrothermal method with zeolite Beta as the silicon source. The physicochemical properties of SAPO-11, Beta molecular sieve, the composite molecular sieve, and the mechanical mixture of SAPO-11 and Beta molecular sieve were characterized by X-ray diffraction, N2 adsorption-desorption, scanning electron microscopy, transmission electron microscopy-energy dispersive spectroscopy, magic-angle spinning nuclear magnetic resonance, and pyridine adsorption infrared spectroscopy. In addition, the catalytic per-formance of platinum-loaded zeolite samples in the hydroisomerization of n-dodecane was investi-gated. The results indicate that the properties and catalytic performance of the composite molecular sieve were quite different from those of the pure zeolites and the mechanical mixture. Compared with the mechanical mixture, the combination of SAPO-11 and Beta by chemical bonds was more tightly bound in the composite

采用液相离子交换法制备了NiY及NiY／Beta分子筛，利用智能重量分析仪测定了噻吩、苯在NiY、NiY／Beta分子筛上的吸附-脱附等温线，计算比较了噻吩、苯在分子筛上的扩散系数，同时使用固定床技术考查了改性后的分子筛对催化裂化汽油的吸附脱硫性能。结果表明，复合分子筛NiY／Beta仍然保持着较好的微孔结构，对噻吩的饱和吸附量大于苯的。而且噻吩在NiY／Beta分子筛上的相对扩散系数明显增大，而苯的扩散系数有所减少，这有利于噻吩在分子筛上的扩散过程，抑制了苯在分子筛上的吸附，从而提高了NiY／Beta复合分子筛对噻吩的选择性脱除能力。对于FCC汽油NiY／Beta复合分子筛也表现出更好的深度脱硫能力。

The adsorption-desorption isotherms of thiophene and benzene in the NiY and NiY/Beta zeolites ,prepared by liquid phase ion exchange ,have been investigated by an intelligent gravimetric analyzer (IGA) and the diffusion coefficients were also calculated .Properties of selective adsorptive desulfurization of FCC gasoline on the zeolites were evaluated by a fixed-bed adsorption experiment . The results show that the NiY/Beta zeolites remain the microporous structure . The saturated adsorption amount of thiophene is larger than that of benzene and so it is to the diffusion coefficients .The better diffusivity of thiophene inhibits the adsorption of benzene , resulting in the absorption desulfurization capability of the NiY/Beta zeolites improved .

概述了近年来国内外在微孔-介孔复合分子筛合成方面的一些常用方法，总结了其结构与性质分析常用的表征手段，并对今后微孔-介孔复合分子筛的发展进行了展望。

The research advances in synthesis and characterization of micro/mesopore composite molecular sieves were summarized systematically, and the future development of composite molecular sieves was also prospected.

综述了加氢脱硫催化剂载体的研究现状及其发展趋势,分别从单组分载体、复合氧化物载体、分子筛和改性载体4个方面论述了加氢脱硫催化剂载体各自的优缺点。单组分载体重点介绍了A12O3、TiO2、炭载体;复合氧化物载体主要对铝基、钛基二元复合氧化物以及三元复合氧化物载体进行了综述;并且对以MCM-41、SBA-15和KIT为代表的介孔分子筛做了介绍;还描述了近年来以改性MCM-41、SBA-15、活性炭为主要研究对象的改性的分子筛。最后指出改性载体尤其是改性分子筛将是未来研究的焦点。

The research status and development tendency of hydrogenation desulfurization (HDS) catalyst support was outlined regarding the issue of high sulfur content in oil products. The development of HDS catalysts was reviewed in four aspects:single-component support,mixed oxide support,molecular sieve and modified support. Single component support,which laid emphasis on Al2O3,TiO2 and carbon support,was introduced in HDS reaction. Besides,mixed oxide support, which mainly includes aluminum-based,titanium-based binary mixed oxide support and ternary mixed oxide support,was summarized. Furthermore,molecular sieve was discussed,including MCM-41, SBA-15 and KIT. Ultimately,modified support,which contains modified MCM-41,modified SBA-15, modified carbon and other modified molecular sieve,was reported emphatically. In the future,modified supports,especially modified molecular sieves,will be paid increasing attention in the field of catalyst supports for HDS.