Abstract
Catalytic steam reforming of long-chain hydrocarbons has drawn great attention for hydrogen production or heat removement, which can be used for on-board/on-site fuel cell or hypersonic vehicle thermal protection. In this study, a series of Ni–Co bi-metal catalysts supported on Al2O3 with different ceria loadings have been prepared by a two-step impregnation method. Physical states and chemical properties of the as-synthesized catalysts have been characterized by XRD, nitrogen adsorption–desorption, H2-TPR and TEM. Steam reforming of n-dodecane has been carried out to evaluate catalytic performance of the obtained catalysts at 700 °C and atmospheric pressure in a fixed-bed tubular reactor. Both effects of CeO2 addition and Ni–Co alloying have been investigated to enhance catalytic activity and stability. After optimization, the catalyst promoted by 5 wt% ceria (NC/5CeAl) exhibits the highest conversion of n-dodecane (89 %) and the lowest coke deposition (reduced by 50 % compared with the one without ceria loading). The improvement in the performance of n-dodecane steam reforming is ascribed to the reduction of Ni particle size on alumina and the acceleration of coke gasification via redox, which has been achieved by Ni–Co alloying and CeO2 promotion.
Graphical Abstract
Ceria-promoted Ni-Co/Al2O3 catalysts have been developed and applied for n-dodecane steam reforming. The obtained results showed that ceria addition and Ni–Co alloying play an important role in n-dodecane steam reforming.
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The author would like to thank Mr Yawei Shi and Miss Yuan Qiu for helpful discussion.
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Xiao, Z., Li, L., Wu, C. et al. Ceria-promoted Ni–Co/Al2O3 Catalysts for n-dodecane Steam Reforming. Catal Lett 146, 1780–1791 (2016). https://doi.org/10.1007/s10562-016-1802-x
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DOI: https://doi.org/10.1007/s10562-016-1802-x