Effect of Ce modified Co/SEP catalyst on hydrogen production via ethanol steam reforming
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Graphical Abstract
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Abstract
Co/SEP and Co-Ce/SEP catalysts were prepared by chemical precipitation method with sepiolite (SEP) as support. X-ray diffraction (XRD), H2-programmed reduction (H2-TPR) and transmission electron microscopy (TEM) were used to characterize the catalysts. It is proved that the addition of Ce significantly improved the dispersion and reducibility of the catalyst. The effects of Ce addition, reaction time, reaction temperature and steam/carbon (S/C) ratio on hydrogen production were investigated. The results show that the ethanol conversion and hydrogen production of Co-Ce/SEP are the highest values, 85% and 65%, respectively, when the WHSV is 20.5 h-1, the S/C ratio is 3 and the reaction temperature is 600℃. Meanwhile, the addition of Ce can make Co-Ce/SEP possess superior activity and stability.
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