期刊
CATALYSIS TODAY
卷 405-406, 期 -, 页码 66-74出版社
ELSEVIER
DOI: 10.1016/j.cattod.2022.08.002
关键词
Oxidative desulfurization; Magnetic; High -entropy effect; Recycling
资金
- National Natural Science Foundation of China
- Post- graduate Research & Practice Innovation Program of Jiangsu Province
- Jiangsu Natural Science Foundation
- [22178154]
- [21878133]
- [22008094]
- [KYCX22_3693]
- [BK20190852]
A magnetic response catalyst, HEO-1100, with a high entropy structure was developed for ultra-deep oxidative desulfurization of diesel. The HEO-1100 catalyst showed significantly enhanced catalytic performance due to its electron-deficient structure and high dispersion of active sites, and it could retain magnetism even at high temperatures, allowing for easy separation and recycling.
Engineering a magnetic response catalyst for ultra-deep oxidative desulfurization of diesel is a valid strategy for recycling. However, for traditional magnetic response catalysts, high temperature is unfavorable, which will induce demagnetization. In this work, a high entropy structure was proposed to construct a magnetic response MoFeNiCuCoOx-1100 (HEO-1100) catalyst by the ion substitution method. Because of the high-entropy effect, the metallic elements in HEO-1100 showed electron-deficiency status, making the magnetism could be retained after 1100 degrees C treatment. Moreover, detailed characterizations showed that the oxidative desulfurization active sites, molybdenum oxide, were uniformly dispersed in the HEO-1100, which was beneficial to the promotion of oxidative desulfurization. Because of the electron-deficient structure along with the high dispersion of active sites, the HEO-1100 catalyst possessed significantly enhanced catalytic performance in oxidative desulfurization with oxygen as an oxidant. Especially, owing to the magnetism, the HEO-1100 catalyst could be readily separated and still exhibited high catalytic activity after 18 times recycling. Furthermore, the desulfurization product, sulfone, could be separated, which was a high-value-added product for medicine.
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