Synthesis and Catalytic Activity of Supported Fe-Ni Nano-Alloys for Butadiene Selective Hydrogenation
Supported Fe-Ni nano-alloy catalysts were prepared by deposition-precipitation with urea.The impact of Fe-Ni composition on the reduction temperature,alloy structure and selective hydrogenation of butadiene performance were investigated by regulating Fe/Ni molar ratio.The results show that Fe-Ni composition can effectively reduce the reduction temperature of mono-metal catalysts Fe and Ni.As Fe molar fraction increases from 0 to 100％,the structure of metal phase gradually changes from face-centered cubic to body-centered cubic.During catalytic hydrogenation,the introduction of Fe has reduced the activity of Ni-based catalysts,but the selectivity to butenes is greatly improved.When Fe/Ni molar ratio is 25/75,the supported Ni3Fe phase of Ni-rich Fe25Ni75/TiO2-R catalyst exhibits excellent catalytic activity for butadiene(T100％≈95℃)and mono-o lefin selectivity(＞93％).
non-noble metal catalystFe-Ni alloy catalystbutadieneselective hydrogenationlight olefinactive site
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