首页|Synergetic effect of sodium and sulfur on iron catalysts for CO hydrogenation directly to lower olefins
Synergetic effect of sodium and sulfur on iron catalysts for CO hydrogenation directly to lower olefins
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NSTL
Iron-based catalysts have recognized as the promising candidates for syngas conversion to value-added products.Sodium and sulfur are widely used to refrain the product distribution towards lower olefins.Herein,the synergetic effect between Na and S were investigated by modulating χ-Fe5C2 with Na and/or S.With the characterization of XRD,Raman spectra,FESEM,TEM,TPD,XPS and semi-quantification calculations,we have revealed that when Na and S are added simultaneously,Na tends to activate the deactivated iron sites by S through electron transfer while the formation of long-chain products were weakened.We also demonstrated that sequential loading Na and S would not result in such synergetic effect because of the overlarge intimacy between both elements.This work emphasizes the significance of the synergetic effect of muti-promotors in such a kind of heterogenous catalysis.
CO HydrogenationLower olefinsSulfurSodiumSynergetic effect
Yitao Liu、Minjie Xu、Xiaoxu Ding
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State Key Laboratory of Chemical Engineering,East China University of Science and Technology,130 Meilong Road,Shanghai 200237,China
NSTL
