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首页> 外文期刊>Catalysts >Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO 2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship
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Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO 2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship

机译：CeO 2负载的过渡金属（Fe，Co，Ni，Cu）催化剂上乙醇蒸汽重整（ESR）制氢的能力：结构活性关系的认识

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摘要

The aim of the present work was to investigate steam reforming of ethanol with regard to H 2 production over transition metal catalysts supported on CeO 2 . Various parameters concerning the effect of temperature (400–800 °C), steam-to-carbon (S/C) feed ratio (0.5, 1.5, 3, 6), metal entity (Fe, Co, Ni, Cu) and metal loading (15–30 wt.%) on the catalytic performance, were thoroughly studied. The optimal performance was obtained for the 20 wt.% Co/CeO 2 catalyst, achieving a H 2 yield of up to 66% at 400 °C. In addition, the Co/CeO 2 catalyst demonstrated excellent stability performance in the whole examined temperature range of 400–800 °C. In contrast, a notable stability degradation, especially at low temperatures, was observed for Ni-, Cu-, and Fe-based catalysts, ascribed mainly to carbon deposition. An extensive characterization study, involving N 2 adsorption-desorption (BET), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM/EDS), X-ray Photoelectron Spectroscopy (XPS), and Temperature Programmed Reduction (H 2 -TPR) was undertaken to gain insight into the structure-activity correlation. The excellent reforming performance of Co/CeO 2 catalysts could be attributed to their intrinsic reactivity towards ethanol reforming in combination to their high surface oxygen concentration, which hinders the deposition of carbonaceous species.
机译：本工作的目的是研究关于在CeO 2上负载的过渡金属催化剂上H 2生产的乙醇蒸汽重整。有关温度（400–800°C），蒸汽碳（S / C）进料比（0.5、1.5、3、6），金属实体（Fe，Co，Ni，Cu）和金属的影响的各种参数负载量（15–30 wt。％）对催化性能的影响进行了深入研究。对于20wt。％的Co / CeO 2催化剂获得了最佳性能，在400℃下实现了高达66％的H 2产率。此外，Co / CeO 2催化剂在整个400-800°C的温度范围内均表现出出色的稳定性能。相反，对于Ni-，Cu-和Fe-基催化剂，观察到明显的稳定性下降，特别是在低温下，主要归因于碳沉积。广泛的表征研究，涉及N 2吸附-解吸（BET），X射线衍射（XRD），扫描电子显微镜（SEM / EDS），X射线光电子能谱（XPS）和程序升温还原（H 2 -TPR）进行了深入研究，以了解结构活性相关性。 Co / CeO 2催化剂优异的重整性能可归因于其对乙醇重整的内在反应性以及高表面氧浓度，这阻碍了碳质物质的沉积。

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