Syngas production via CO₂ reforming of methane using Co-Sr-Al catalyst

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• 作者：Anis Hamza Fakeeha ; Muhammad Awais Naeem ; Wasim Ullah Khan ; Ahmed Sadeq Al-Fatesh
• 关键词：CO2/CH4 Reforming ; Catalyst ; Basicity ; Coke ; Stability ; Sr ; Co
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：25 March, 2014
• 年：2014
• 卷：20
• 期：2
• 页码：549-557
• 全文大小：2225 K

文摘

The effect of addition of strontium in Co based catalysts during CO₂ reforming of methane was investigated in the temperature range 500-700 掳C. The Co/纬-Al₂O₃ supported catalysts with strontium as a promoter (0-2.25 wt%) were prepared by incipient wet impregnation method. Numerous techniques such as N₂ adsorption-desorption isotherm, H₂ temperature-programmed reduction (TPR), temperature-programmed desorption (TPD), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Transmission Electron Microscopy (TEM), pulse chemisorption and temperature-programmed oxidation (TPO) were applied for characterization of fresh and spent catalysts. The results of characterizations and catalyst activity test revealed that introduction of Sr in Co/纬-Al₂O₃ catalyst had significant effect on stability and coke suppression. The Sr addition improves the metal-support interaction as well as enhances the Lewis basicity of the catalyst. The improvement in basicity helps the chemisorption and dissociation of CO₂ over the catalyst which in turn reduces carbon deposition.