Potential of Ni supported on KH zeolite catalysts for carbon dioxide reforming of methane

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• 作者：Athiya Kaengsilalai ; Apanee Luengnaruemitchai ; Sirirat Jitkarnka ; Sujitra Wongkasemjit
• 关键词：CO₂ reforming ; Methane ; KH zeolite ; Nickel ; Sol– ; gel process
• 刊名：Journal of Power Sources
• 出版年：2007
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：25 February 2007
• 卷：165
• 期：1
• 页码：347-352
• 文件大小：672 K

摘要

The catalytic activity of Ni on a series of catalysts supported on the synthesized KH zeolite for the CO₂ reforming of methane has been investigated. The KH zeolite supports were previously synthesized via silatrane and alumatrane precursors using the sol–gel process and hydrothermal microwave treatment. Eight percent Ni was impregnated onto the synthesized KH zeolites, which have different morphologies: called dog-bone, flower, and disordered shapes. The prepared Ni/KH zeolites were tested for their catalytic activity at 700 °C, at atmospheric pressure, and at a CH₄/CO₂ ratio of 1. The results showed that Ni supported on dog-bone and flower-shaped KH zeolites provided better activity than that of disordered KH zeolite due to higher CH₄ and CO₂ conversions, a higher H₂ production, and a smaller amount of coke formation on the catalyst surface. Furthermore, the stability of the Ni/KH zeolite was greatly superior to that of Ni supported on alumina and clinoptiolite catalysts after 65 h on stream.