Synthesis of H2WO4/GO and Its Oxidative Desulfurization Activity

• 作者: Wang Zihao Li Xiuping Hao Yangyang Zhao Rongxiang
• 来源期刊: 中国炼油与石油化工（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: Scientific Research
• 页码范围: 66-76
• 页数: 11页
• 语种: 英文

摘要

H2WO4/GO catalyst was synthesized by the immersion method and was characterized by using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and nitrogen adsorption-desorption measurements (BET). The characterization results show that H2WO4 has been dispersed on GO (grapheme oxide). H2WO4/GO was used as catalyst in the oxidative desulfurization of dibenzothiophene (DBT), with H2O2 acting as oxidant and acetonitrile acting as extraction agent. The experimental results show that the sulfur removal rate for DBT reach 99.2%, that for 4,6-dimethyldibenzothiophene (4,6-DMDBT) reach 95% and that for benzothiophene (BT) reach 42.8% under the optimal reaction conditions. Meanwhile, the recycled catalysts still exhibits good desulfurization performance after four operating cycles. The high activity and stability of catalysis is attributed to a small dose of H2WO4, which is highly dispersed inside the layers of GO. This desulfurization reaction follows the pseudo-first-order kinetics, and the apparent activation energy of the desulfurization reaction is 18.515 kJ/mol, which indicates that the H2WO4/GO used as desulfurization catalyst has demonstrated good desulfurization property for DBT.