烟气脱硫
硫黄
化学工程
化学
碳纤维
催化作用
电子转移
基质(水族馆)
无机化学
材料科学
有机化学
海洋学
复合数
工程类
复合材料
地质学
作者
Lei Chen,Jin‐Tao Ren,Haoyu Wang,Minglei Sun,Zhong‐Yong Yuan
出处
期刊:ACS Catalysis
日期:2023-08-30
卷期号:13 (18): 12125-12133
被引量:12
标识
DOI:10.1021/acscatal.3c02509
摘要
Oxidative desulfurization (ODS) using H2O2 oxidant has emerged as a viable carbon-neutral way to produce premium-grade sulfur-free fuels, yet it currently suffers from overconsumption of oxidants and low efficiency for the immiscibility and high interfacial tension of water and oil. Here, we report efficient ODS using minimal H2O2 oxidant without phase transfer agents. This is achieved by introducing organic modifiers (for example, etidronic acid (EA)) on molybdenum oxides anchored carbon nanotubes to dynamically activate Mo active sites and capture H2O2 molecules. Such in situ generated local hydrophilicity depends on the electron-donating and hydrophilic −OH functional groups in EA, which can not only endow Mo active sites with high electron density for chemisorption of H2O2 but also ensure the sufficient supply of H2O2. Combined with the substrate enrichment effect of hydrophobic porous carbon to sulfur contaminants, the efficient ODS reaction occurs at the solid–water–oil three-phase interface. The complete desulfurization was achieved within 10 min at 40 °C with an O/S ratio of 1, surpassing the optimum in the literature. This work unveils an avenue to improve ODS activity by harnessing the local reaction environment.
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