Catalytic Methanation of CO and CO2 in Coke Oven Gas over Ni鈥揅o/ZrO2鈥揅eO2

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• 作者：Rauf Razzaq ; Hongwei Zhu ; Li Jiang ; Usman Muhammad ; Chunshan Li ; Suojiang Zhang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：February 13, 2013
• 年：2013
• 卷：52
• 期：6
• 页码：2247-2256
• 全文大小：568K
• 年卷期：v.52,no.6(February 13, 2013)
• ISSN：1520-5045

文摘

The methanation of CO and CO₂ present in coke oven gas was performed in a fixed-bed catalytic reactor at a reaction temperature between 200 and 400 掳C. Different support materials, including SiO₂, Al₂O₃, ZrO₂, and CeO₂, were doped with a different percentage of active metals using a standard impregnation and coprecipitation method. The catalysts were characterized using Brunauer鈥揈mmett鈥揟eller analysis, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and temperature-programmed desorption techniques. The activity of all samples was tested in terms of the percentage of CO and CO₂ conversion and CH₄ selectivity. The results were analyzed on the basis of the difference in the catalytic performance at different active metal loadings and support materials. The effect of the catalytic support on the reducibility, morphology, and active metal dispersion was investigated. The ZrO₂鈥揅eO₂-supported catalyst prepared under coprecipitation can attain 100% CO conversion at around 300 掳C and 鈮?5% CO₂ conversion at 400 掳C and has a CH₄ selectivity of 99%.