Hexagonal boron nitride:A metal-free catalyst for deep oxidative desulfurization of fuel oils

• 作者: Fengxia Zhu Huaming Li Jing He Linjie Lu Linlin Chen Minqiang He Peiwen Wu Wenshuai Zhu Xiaozhong Chu Yanhong Chao
• 来源期刊: 绿色能源与环境:英文版
• 学科: 化学
• 关键词: Boron nitride METAL-FREE OXIDATION Deep desulfurization Fuel oils
• 年，卷（期）: 2020,（2）
• 页码范围: 166-172
• 页数: 7页
• 分类号: O64

摘要

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·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.