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Effect of Oxide Support on Catalytic Performance of FeNi‐based Catalysts for CO 2 ‐assisted Oxidative Dehydrogenation of Ethane
Author(s) -
Yan Binhang,
Yao Siyu,
Chen Jingguang G.
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901585
Subject(s) - dehydrogenation , catalysis , selectivity , oxide , x ray absorption fine structure , inorganic chemistry , materials science , metal , heterogeneous catalysis , ethylene , chemistry , metallurgy , organic chemistry , quantum mechanics , spectroscopy , physics
Abstract CO 2 ‐assisted oxidative dehydrogenation of ethane over Fe 3 Ni 1 catalysts supported on SiO 2 , ZrO 2 , and CeO 2 , as well as CeO 2 ‐supported Fe 3x Ni x with different metal loadings (x=0.25, 0.5, 1, 2, 4), were investigated to illustrate the effects of the oxide support and the metal loading amount in tuning the catalytic activity and selectivity. The oxidation state and the dispersion of the Ni and Fe species on the supported catalysts were determined by using in‐situ X‐ray diffraction (XRD) and X‐ray absorption fine structure (XAFS) measurements. Among these FeNi‐based catalysts, Fe 3 Ni 1 /CeO 2 exhibited the best catalytic activity and maximum ethylene yield for the oxidative dehydrogenation of ethane. Excessive loading amount of active metals changed the reaction selectivity from oxidative dehydrogenation to dry reforming. The high activity and selectivity for CO 2 ‐assisted oxidative dehydrogenation of ethane over Fe 3 Ni 1 /CeO 2 are likely due to the formation of Ni‐FeO x /CeO x interfacial sites, while the presence of Ni‐ZrO 2 interfacial sites on Fe 3 Ni 1 /ZrO 2 and NiFe‐CeO x interfacial sites on Fe 12 Ni 4 /CeO 2 likely tune the reaction selectivity toward dry reforming of ethane.