Journal
GREEN ENERGY & ENVIRONMENT
Volume 5, Issue 2, Pages 166-172Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.gee.2020.03.004
Keywords
Boron nitride; Metal-free; Oxidation; Deep desulfurization; Fuel oils
Categories
Funding
- National Key R&D Program of China [2017YFB0306504]
- National Natural Science Foundation of China [21722604, 21878133, 21908082]
- China Postdoctoral Science Foundation [2019M651743]
- Natural Science Foundation of Jiangsu Province [BK20190852, BK20190854]
- Natural Science Foundation for Jiangsu Colleges and Universities [19KJB530005]
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Oxidative desulfurization (ODS) has been proved to be an efficient strategy for the production of clean fuel oil. Numerous metal-based materials have been employed as excellent ODS catalysts, but being hindered by their high-cost and potential secondary pollution. In this work, we employed graphene analogous hexagonal boron nitride (h-BN) as a metal-free catalyst for ODS with hydrogen peroxide (H2O2) as the oxidant. The h-BN catalyst was characterized and proved to be a few-layered structure with relatively high specific surface areas. The h-BN catalyst showed a 99.4% of sulfur removal in fuel oil under the optimized reaction conditions. Besides, the h-BN can be recycled for 8 times without significant decrease in the catalytic performance. Detailed mechanism analysis found that it is the boron radicals in h-BN activated H2O2 to generate center dot OH species, which can readily oxidize sulfides to corresponding sulfones for separation. This work would provide another choice in choosing metal-free catalysts for ODS. (C) 2020, Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
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