Nickel catalyst supported on mesoporous MgAl₂O₄ nanopowders synthesized via a homogenous precipitation method for dry reforming reaction

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• 作者：Fereshteh Meshkani ; Sayyede Fateme Golesorkh…
• 关键词：Dry reforming ; Magnesium aluminate ; Carbon dioxide ; Nanopowders ; Nickel catalysts
• 刊名：Research on Chemical Intermediates
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：545-559
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Catalysis; Physical Chemistry; Inorganic Chemistry;
• 出版者：Springer Netherlands
• ISSN：1568-5675
• 卷排序：43

文摘

Mesoporous MgAl₂O₄ nanopowders were synthesized via the homogenous precipitation method and employed as a support for Ni catalysts in the dry reforming reaction. The prepared samples were characterized by XRD, BET, TPR, TPO, NH₃-TPD, and SEM techniques. The XRD and BET results revealed that the prepared MgAl₂O₄ powder exhibited a nanocrystalline structure with high surface area (175 m2g−1). The catalytic tests, including activity and stability tests, showed that the prepared catalysts with various nickel loadings possessed high activity and stability in reaction. The Ni/MgAl₂O₄ with the highest amount of Ni had an acceptable performance in a long-term stability test. Increasing nickel loading increased the methane conversion and the amount of deposited carbon. The effects of feed ratio and GHSV on the catalytic activity of the Ni/MgAl₂O₄ catalyst were investigated in detail.