Petroleum Science >2022,??lssue 3:??- DOI: https://doi.org/10.1016/j.petsci.2021.11.010.
N-hydroxyphthalimide anchored on hexagonal boron nitride as a metal-free heterogeneous catalyst for deep oxidative desulfurization Open?Access
文章信息
作者：Lin-Jie Lu, Pei-Wen Wu, Jing He, Ming-Qing Hua, Yan-Hong Chao, Ning Yang, Lin-Lin Chen, Wei Jiang, Lei Fan, Hong-Bing Ji, Wen-Shuai Zhu
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引用方式：Lin-Jie Lu, Pei-Wen Wu, Jing He, Ming-Qing Hua, Yan-Hong Chao, Ning Yang, Lin-Lin Chen, Wei Jiang, Lei Fan, Hong-Bing Ji, Wen-Shuai Zhu, N-hydroxyphthalimide anchored on hexagonal boron nitride as a metal-free heterogeneous catalyst for deep oxidative desulfurization, Petroleum Science, Volume 19, Issue 3, 2022, Pages 1382-1389, https://doi.org/10.1016/j.petsci.2021.11.010.
文章摘要
Abstract: A metal-free N-hydroxyphthalimide/hexagonal boron nitride (NHPI/h-BN) catalytic system was developed for deep oxidative desulfurization (ODS) of fuel oils. Detailed experiments find that the heterogenization process of loading NHPI on h-BN not only benefits to the dispersion and utilization of NHPI, but also can significantly promote the catalytic performance. By employing NHPI/h-BN as the catalyst, azodiisobutyronitrile (AIBN) as the metal-free initiator, a 95% conversion of dibenzothiophene (DBT) can be acquired under the reaction conditions of 120?°C and atmospheric pressure with molecular oxygen (O2) as oxidant. Moreover, the heterogenization is convenient for the regeneration of the catalyst with >94% DBT conversion after being recycled seven times. Characterizations illustrate that the promoted catalytic activity along with the regenerability originate from the interactions between NHPI and h-BN. The catalytic mechanism study shows that molecular oxygen is readily activated by the NHPI/h-BN to form a superoxide radical (O2??), which oxidize DBT to DBTO2 for desulfurization.
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Keywords: N-hydroxyphthalimide; Hexagonal boron nitride; Oxidative desulfurization; Heterogeneous catalysis