Mechanical exfoliation of boron carbide: A metal-free catalyst for aerobic oxidative desulfurization in fuel.,Journal of Hazardous Materials

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Mechanical exfoliation of boron carbide: A metal-free catalyst for aerobic oxidative desulfurization in fuel.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-23 , DOI: 10.1016/j.jhazmat.2020.122183
Peiwen Wu ₁ , Qingdong Jia ₁ , Jing He ₁ , Linjie Lu ₁ , Linlin Chen ₁ , Jie Zhu ₁ , Chong Peng ₂ , Minqiang He ₁ , Jun Xiong ₁ , Wenshuai Zhu ₁ , Huaming Li ₁

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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 ∼90 % of the sulfur compounds in real diesel oil could be removed by the current aerobic ODS system.

中文翻译：

碳化硼的机械剥落：一种用于燃料中好氧氧化脱硫的无金属催化剂。

在需氧氧化脱硫（ODS）中，无金属催化剂已被证明是一种低成本且对环境友好的物质。在这项工作中，首先在好氧ODS系统中采用层状结构少，尺寸小和缺陷多的无金属薄片的碳化硼进行超深度脱硫。剥落过程是通过采用行星式球磨机策略实现的。详细的特征表明，球磨工艺不仅会产生较薄的层和较小的尺寸，而且还会将许多缺陷引入碳化硼催化剂中，这对无金属催化至关重要。此外，将剥离的碳化硼催化剂应用于好氧ODS系统，获得了99.5％的硫去除率。而且，该催化剂可以循环使用17次而不会显着降低催化活性。

更新日期：2020-01-23

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