掺氮石油焦基活性炭常温催化氧化硫化氢研究

Preparation of nitrogen-doped petroleum coke based activated carbon and its performance in catalytic oxidation of hydrogen sulfide at room temperature

以石油焦为碳源,以三聚氰胺生产中的固体废弃物为氮源,成功制备了一种新型氮掺杂多孔碳,并在室温下表现出优异的H2S催化氧化能力,穿透硫容可达398.4mg/g.制备过程中活化剂用量、氮掺杂温度、氮源用量三个工艺参数分别改变了催化剂的比表面、N构型、N含量.通过优化工艺条件,可使最高的反应活性中心——吡啶N的含量达2.88at.%.与传统材料制备的催化剂相比,实现了废物利用和绿色制备.本文结果可为制备低成本、高突破硫容量的多孔碳材料提供一种新的方法.

A novel nitrogen-doped porous carbon was successfully prepared using petroleum coke as the carbon source and the solid waste from melamine production as the nitrogen source.The catalyst exhibited excellent H2S catalytic oxidation capacity in room temperature with a breakthrough sulfur capacity of 398.4mg/g.Three process parameters,namely,the amount of activator,nitrogen doping temperature and nitrogen source,changed the specific surface,N configuration and N content of the catalysts,respectively,during the preparation process.By optimizing the process conditions,the highest reactive center,pyridine N,could be achieved at 2.88at.%.Compared with the catalyst prepared using traditional raw material,it achieves waste utilization and green preparation.The results of this paper provide a new approach for the preparation of porous carbon materials with low cost and high breakthrough sulfur capacity.