Xu Lijun, Tong Qian, Hu Bing
School of Materials and Chemical Engineering, Hubei University of Technology Wuhan 430068 People's Republic of China
RSC Adv. 2024 Nov 18;14(49):36622-36632. doi: 10.1039/d4ra06736c. eCollection 2024 Nov 11.
Through a simple room-temperature process, different amounts of Keggin-type quaternary ammonium silicotungstate were successfully encapsulated into the metal-organic framework (MOF) material ZIF-67. The catalysts were characterized using Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and BET analysis. An extraction and catalytic oxidation desulfurization system was studied using HO as an oxidant and a deep eutectic solvent (DES) as an extractant. Using the 43.06%-SiW@ZIF-67 composite under optimal reaction conditions, DBT present in a model oil could be deeply and effectively removed. The catalyst was reused 6 times, and the desulfurization rate still exceeded 90%. Finally, a possible desulfurization mechanism is proposed.
通过一个简单的室温过程，不同量的Keggin型季铵硅钨酸盐成功地被封装到金属有机框架（MOF）材料ZIF-67中。使用傅里叶变换红外（FT-IR）光谱、X射线粉末衍射（XRD）、扫描电子显微镜（SEM）和BET分析对催化剂进行了表征。以H₂O₂为氧化剂、深共熔溶剂（DES）为萃取剂，研究了一种萃取和催化氧化脱硫体系。在最佳反应条件下，使用43.06%-SiW@ZIF-67复合材料，可以深度有效地脱除模型油中存在的二苯并噻吩（DBT）。该催化剂重复使用6次，脱硫率仍超过90%。最后，提出了一种可能的脱硫机理。
