催化作用
甲烷
二氧化碳重整
碳纤维
焦炭
分解
合成气
无机化学
化学工程
化学
材料科学
有机化学
复合材料
复合数
工程类
作者
Yongtak Kwon,J. Ehren Eichler,Michael E. Floto,Lettie A. Smith,Aaron M. Satkoski,C. Buddie Mullins
标识
DOI:10.1002/slct.202203734
摘要
Abstract When investigating carbonaceous species on a catalyst via temperature‐programmed techniques, both the nature of the carbons and the possibility of the catalytic reaction of carbonaceous species should be considered. Here we examined CH 4 decomposition (carbon deposition from CH 4 ) and the reverse Boudouard reaction (carbon elimination by CO 2 ) on the Ni/Al 2 O 3 catalyst using sequential temperature‐programmed experiments. Carefully considering both the location and characteristics of carbon deposits formed on the Ni/Al 2 O 3 catalyst, we conclude that carbons located on the Al 2 O 3 support are challenging to remove by CO 2 regardless of their nature, indicating the importance of support activity in reducing carbon deposits. In this study, the incorporation of cesium (Cs) into Al 2 O 3 shows no effect on the prevention of carbon deposition from CH 4 but does show an enhancement of carbon removal via the reverse Boudouard reaction, resulting in less coke formation on the Ni/Cs doped Al 2 O 3 catalyst than the Ni/Al 2 O 3 catalyst by 17 % for the dry reforming of methane.
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