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Promotion effect of additive Fe on Al 2 O 3 supported Ni catalyst for CO 2 methanation
Author(s) -
Li Zhenhua,
Zhao Tingting,
Zhang Lijuan
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4328
Subject(s) - methanation , catalysis , bimetallic strip , chemistry , selectivity , inorganic chemistry , nickel , transition metal , nuclear chemistry , organic chemistry
In this paper, the effect of additive Fe on Ni/Al 2 O 3 catalyst for CO 2 methanation was studied. A series of bimetallic Ni–Fe catalysts with different Ni/Fe ratios were prepared by impregnation method. For comparison, monometallic Fe‐based and Ni‐based catalysts were also prepared by the same method. The characterization results showed that adding Fe to Ni catalyst on the premise of a low Ni loading(≦12 wt.%) enhanced CO 2 methanation performance. However, when the Ni loading reached 12 wt.%, the catalytic activity decreased with the increase of Fe content, but still higher than the corresponding Ni‐based catalyst without Fe. Among them, the 12Ni3Fe catalyst exhibited the highest CO 2 conversion of 84.3 % and nearly 100% CH 4 selectivity at 50000 ml g ‐1 h ‐1 and 420 °C. The enhancement effect of adding Fe on CO 2 methanation was attributed to the dual effect of suitable electronic environment and increased reducibility generated by Fe species.