氮化硼
甲烷
二氧化碳重整
材料科学
焦炭
化学工程
合成气
碳纤维
催化作用
无定形碳
结晶度
氮化物
涂层
硼
无定形固体
冶金
纳米技术
化学
复合材料
有机化学
复合数
图层(电子)
工程类
作者
Jiang Deng,Kankan Bu,Yongjie Shen,Xiaoyu Zhang,Jianping Zhang,Kajornsak Faungnawakij,Dengsong Zhang
标识
DOI:10.1016/j.apcatb.2021.120859
摘要
Dry reforming of methane provides a feasible solution to reduce the greenhouse gas via simultaneously converting CH4 and CO2 into useful syngas. However, conventional Ni-based catalysts suffer from deactivation due to serious carbon coking during dry reforming of methane process. Herein, we propose a concept by reducing crystallinity of formed carbon and accelerating carbon oxidization to enhance the coking resistance of Ni-based catalysts. This concept was conducted through a boron nitride coating strategy over reducible oxides supported Ni catalysts, in which the increased carbon diffusion barrier, induced by the boron nitride coating, would lead to more amorphous carbon. While the amorphous carbon was efficiently gasified by active oxygen species derived from reducible oxides. Our findings demonstrate that the coke issues can be solved by building a dynamic carbon removal route.
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