Abstract Micro-mesoporous Beta-FDU-12 (BF) materials were synthesized by a nano-assembling method with different amounts of microporous Beta materials. CoMo catalysts, with Co and Mo active metals supported on BFA composites (a mixture of BF and γ-Al 2 O 3 ), were prepared by two-step incipient-wetness impregnation procedures. The BF micro/mesoporous materials and their corresponding CoMo/BFA catalysts were characterized by various techniques, including small-angle X-ray scattering (SAXS), X-ray diffraction(XRD), transmission electron microscopy (TEM), Fourier Transform Infrared(FTIR), pyridine-FTIR, nitrogen adsorption-desorption, UV–vis diffuse reflectance spectroscopy (DRS), Raman and X-ray photoelectron spectroscopy(XPS). The characterization results indicated that BF micro/mesoporous materials had the structures with both of the mesoporous FDU-12 materials and microporous Beta materials. Among the catalysts with different mass ratios of Beta/F127, CoMo/BFA2 catalyst showed the best comprehensive hydrofining performance with a hydrodesulfurization (HDS) efficiency of 98.1% and a hydrodenitrogenation (HDN) efficiency of 95.6% for FCC diesel, which was ascribed to the appropriately synergistic effect of pore properties and acid property. Furthermore, after the modification of ethylenediaminetetraacetic acid (EDTA) by the post-treatment method, the dispersibility of Mo species on the catalyst surface was significantly improved, which led to a better hydro-upgrading performance of FCC distillates, whereas gasoline desulfurization efficiency of 94.2% and octane loss of 0.8 units, and diesel desulfurization efficiency of 99.0% and denitrification efficiency of 97.3%.

中文翻译：

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Beta-FDU-12的合成与表征及FCC汽柴油加氢脱硫性能

摘要 通过纳米组装方法合成了微孔Beta-FDU-12 (BF)材料。CoMo 催化剂的 Co 和 Mo 活性金属负载在 BFA 复合材料（BF 和 γ-Al 2 O 3 的混合物）上，通过两步初湿浸渍程序制备。BF微/介孔材料及其相应的CoMo/BFA催化剂通过各种技术进行表征，包括小角X射线散射（SAXS）、X射线衍射（XRD）、透射电子显微镜（TEM）、傅里叶变换红外（ FTIR)、吡啶-FTIR、氮吸附-解吸、紫外-可见漫反射光谱 (DRS)、拉曼和 X 射线光电子能谱 (XPS)。表征结果表明BF微/介孔材料具有介孔FDU-12材料和微孔Beta材料的结构。在不同质量比的 Beta/F127 催化剂中，CoMo/BFA2 催化剂表现出最佳的综合加氢精制性能，加氢脱硫（HDS）效率为 98.1%，FCC 柴油加氢脱氮（HDN）效率为 95.6%，这归因于孔隙特性和酸性特性的适当协同作用。此外，乙二胺四乙酸（EDTA）经后处理法改性后，Mo物种在催化剂表面的分散性显着提高，使FCC馏分油的加氢改质性能更好，而汽油脱硫效率为94 .