Autothermal reforming of methane over Ni catalysts supported on nanocrystalline MgO with high surface area and plated-like shape

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• 作者：Mehran  ; Rezaei  ; ;   ; ^{rezaei@kashanu.ac.ir} ; Fereshteh  ; Meshkani ; Abolfazl Biabani  ; Ravandi ; Behzad  ; Nematollahi ; Atiyeh  ; Ranjbar ; Narges  ; Hadian ; Zeinab  ; Mosayebi
• 关键词：Autothermal reforming ; Syngas ; Nickel catalyst
• 刊名：International Journal of Hydrogen Energy
• 出版年：2011
• 出版时间：September 2011
• 年：2011
• 卷：36
• 期：18
• 页码：11712-11717
• 全文大小：1196 K

文摘

Autothermal reforming of methane (ATRM), combination of partial oxidation and steam reforming was performed over MgO supported Ni catalysts. The preparation of MgO via surfactant-assisted precipitation method led to obtain a nanocrystalline carrier for nickel catalysts. The results demonstrated that methane conversion is significantly increased with increasing the Ni content (5, 7, 10 and 15 % Ni) and methane conversion of 15 % Ni/MgO was higher than that of other catalysts with lower Ni loading in all operation temperatures.

In addition, increasing the system operation temperatures led to decrease in H₂/CO due to the fact that water-gas shift reaction was thermodynamically unfavorable at elevated temperatures. This catalyst also exhibited stable catalytic performance during 50?h time on stream. Furthermore, the influences of varying GHSV and feed ratio on activity of 15 % Ni/MgO catalyst were investigated.