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Effect of Ceria Amount on Promoting Ni‐Co/SBA‐15 Catalyst for n‐Dodecane Steam Reforming
Author(s) -
Xiao Zhourong,
Wang Li,
Zhang Xiangwen,
Li Ling,
Wu Chan,
Ji Shuang,
Liu Guozhu,
Li Guozhu
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601439
Subject(s) - steam reforming , catalysis , space velocity , materials science , chemical engineering , hydrogen production , coke , ethylene glycol , inorganic chemistry , sintering , metal , dodecane , methane reformer , nuclear chemistry , chemistry , metallurgy , organic chemistry , selectivity , engineering
Catalytic steam reforming of long‐chain hydrocarbons has drawn great attention for hydrogen production, which can be used for on‐board/on‐site fuel cell. In this study, a series of SBA‐15 supported Ni−Co bi‐metal catalysts with different ceria loadings (denoted as NC‐xCeO 2 /SBA‐15) have been prepared via a facile ethylene‐glycol route. Various techniques including XRD, nitrogen adsorption‐desorption, H 2 ‐TPR/O 2 ‐TPO, TPH, TEM/SEM, TG/DTG and Raman spectra were employed to characterize the fresh and spent catalysts. Steam reforming of n‐dodecane has been carried out to evaluate catalytic performance of the obtained catalysts at high LHSV (24 ml/g cat ⋅h) and atmospheric pressure in a fixed‐bed tubular reactor using the H 2 O/C ratio of 4. The catalyst with 6wt% CeO 2 (NC‐6CeO 2 /SBA‐15) exhibits the best activity and stability. The improvement of performance for n‐dodecane steam reforming is ascribed to the strong interaction between metal and ceria, which would control metal growth and prevent metal sintering. In addition, the oxidation of deposited coke on metal has been facilitated by the accompanied ceria promoter via its excellent oxygen storage‐release capability.