Ti-containing Mobil composition of matter-twenty-two (Ti-MWW) zeolite was prepared via a two-step post-synthesis process and then characterized by X-ray fluorescence, nitrogen adsorption-desorption isotherms, Fourier transform infrared absorption spectra, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectra. These results indicate that the textural properties of MWW were well preserved after acid treatment and incorporation of titanium. An adsorptive-oxidative desulfurization (AODS) system was successfully developed on the basis of a model oil containing dibenzothiophene (DBT) with the as-prepared Ti-MWW being the catalyst and adsorbent and cumene hydroperoxide (CHP) being the oxidant. The parameters influencing the desulfurization performance were systematically investigated. These parameters include the Ti-MWW dosage, the reaction temperature, the stirring speed, the molar ratio of CHP to DBT and the additions of olefins and aromatics to the system. The conversion rate of DBT reached 99.6% via the catalytic oxidation process and the turnover frequency was 40.1 h⁻¹. Meanwhile, the oxidation products of DBT were removed by Ti-MWW adsorption. The recycling and regeneration performance of Ti-MWW were also investigated, and the DBT conversion reached 99.5% using the regenerated Ti-MWW. This work provides useful information for the construction of solvent-free oxidative desulfurization systems using a zeolite.

通过两步后合成工艺制备了含钛物质二十二 (Ti-MWW) 沸石的 Mobil 组合物，然后通过 X 射线荧光、氮吸附-解吸等温线、傅里叶变换红外吸收光谱、X射线衍射、扫描电子显微镜、透射电子显微镜和 X 射线光电子能谱。这些结果表明，在酸处理和掺入钛后，MWW 的结构特性得到了很好的保留。以所制备的Ti-MWW为催化剂和吸附剂，氢过氧化枯烯（CHP）为氧化剂，在含二苯并噻吩（DBT）模型油的基础上，成功开发了吸附氧化脱硫（AODS）系统。系统地研究了影响脱硫性能的参数。这些参数包括 Ti-MWW 用量、反应温度、搅拌速度、CHP 与 DBT 的摩尔比以及烯烃和芳烃添加到系统中。DBT通过催化氧化过程的转化率达到99.6%，周转频率为40.1 h^-1。同时，通过 Ti-MWW 吸附去除 DBT 的氧化产物。还研究了 Ti-MWW 的回收和再生性能，使用再生的 Ti-MWW，DBT 转化率达到 99.5%。这项工作为使用沸石构建无溶剂氧化脱硫系统提供了有用的信息。