Carbon dioxide reforming of methane over Ni/Al₂O₃ treated with glow discharge plasma

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• 作者：Dang-guo Cheng ; Xinli Zhu ; Yuheng Ben ; Fei He ; Lan Cui and Chang-jun Liu
• 关键词：Methane ; Reforming ; Carbon dioxide ; Ni/Al₂O₃ ; Pretreatment ; Glow discharge
• 刊名：Catalysis Today
• 出版年：2006
• 出版时间：30 June 2006
• 年：2006
• 卷：115
• 期：1-4
• 页码：205-210
• 全文大小：625 K

文摘

Ni/Al₂O₃ catalyst was first treated by argon glow discharge plasma followed by calcination in air. The catalyst prepared this way exhibits an improved low-temperature activity for carbon dioxide reforming of methane, compared to the catalyst prepared without plasma treatment. The catalyst characterization using XRD, chemisorption and TEM analyses show that the plasma treatment followed by calcination thermally induces a generation of specific nickel species on the support. This kind of “plasma” metal species is highly dispersed on the support and can remain stable during reforming reactions. The average size of the “plasma” metal particles is ca. 5 nm. The plasma treatment can also enhance the anti-carbon deposition performance of the catalyst. The formation of carbon species that is responsible for catalyst deactivation can be inhibited. The catalyst stability is therefore improved.