Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 391, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.122183
Keywords
Ultra-deep desulfurization; Boron carbide; Exfoliation; Fuels; Mechanism
Categories
Funding
- National Natural Science Foundation of China [21722604, 21908082, 21606113]
- China Postdoctoral Science Foundation [2019M651743]
- Natural Science Foundation of Jiangsu Province [BK20190852, BK20190854]
- Natural Science Research of Jiangsu Higher Education Institutions of China [19KJB530005]
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Metal-free catalysts have been proved to be a low-cost and environmentally friendly species in aerobic oxidative desulfurization (ODS). In this work, exfoliated metal-free boron carbide with few-layered structure, small size, and abundant defects, was first employed in an aerobic ODS system for ultra-deep desulfurization. The exfoliation process was realized by employing a planetary ball mill strategy. Detailed characterizations showed that the ball milling process not only induces thinner layers and small sizes but also introduces numerous defects into the boron carbide catalysts, which is vital in metal-free catalysis. Furthermore, the exfoliated boron carbide catalyst was applied in aerobic ODS system, and 99.5 % of sulfur removal was obtained. Moreover, the catalyst can be recycled 17 times without a significant decrease in catalytic activity. In particular, it was found that similar to 90 % of the sulfur compounds in real diesel oil could be removed by the current aerobic ODS system.
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