To achieve palm oil conversion along with a high yield of long‐chain alkane,a series of NiFe layered double oxide catalysts were prepared and employed in the deoxygenation of palm oil.The layered structure of these c...To achieve palm oil conversion along with a high yield of long‐chain alkane,a series of NiFe layered double oxide catalysts were prepared and employed in the deoxygenation of palm oil.The layered structure of these catalysts was confirmed by XRD and SEM analyses,and Ni and Fe species existed primarily in the forms of Ni^(2+)and Fe^(3+),respectively.It was found that Ni/Fe molar ratio influenced the H_(2)reducibility and surface properties of NiFe catalysts.Specifically,Ni_(2)Fe‐LDO and Ni_(3)Fe‐LDO exhibited higher reducibility under H_(2)atmosphere.Moreover,the Ni_(2)Fe‐LDO catalyst contained a higher concentration of surface oxygen species(Osurf).Deoxygenation results demonstrated that the Ni_(2)Fe‐LDO catalyst achieved superior palm oil conversion,higher liquid product yield and enhanced selectivity toward C_(15)–C_(18)hydrocarbons compared to other catalysts.This improved performance was attributed to its higher hydrogen dissociation activity and enhanced adsorption capacity for palm oil molecules.Furthermore,reaction condition studies revealed that palm oil was completely converted,yielding 86.8%liquid product with 81.8%selectivity of C_(15)–C_(18)hydrocarbons at 350℃under 7 MPa H_(2)pressure.This finding provides an insight into the development of efficient catalysts for the deoxygenation of fatty compounds to biofuels.展开更多
基金National Natural Science Foundation of China(22278084)State Key Laboratory of Heavy Oil Processing(SKLHOP202402003)for financing this research.
文摘To achieve palm oil conversion along with a high yield of long‐chain alkane,a series of NiFe layered double oxide catalysts were prepared and employed in the deoxygenation of palm oil.The layered structure of these catalysts was confirmed by XRD and SEM analyses,and Ni and Fe species existed primarily in the forms of Ni^(2+)and Fe^(3+),respectively.It was found that Ni/Fe molar ratio influenced the H_(2)reducibility and surface properties of NiFe catalysts.Specifically,Ni_(2)Fe‐LDO and Ni_(3)Fe‐LDO exhibited higher reducibility under H_(2)atmosphere.Moreover,the Ni_(2)Fe‐LDO catalyst contained a higher concentration of surface oxygen species(Osurf).Deoxygenation results demonstrated that the Ni_(2)Fe‐LDO catalyst achieved superior palm oil conversion,higher liquid product yield and enhanced selectivity toward C_(15)–C_(18)hydrocarbons compared to other catalysts.This improved performance was attributed to its higher hydrogen dissociation activity and enhanced adsorption capacity for palm oil molecules.Furthermore,reaction condition studies revealed that palm oil was completely converted,yielding 86.8%liquid product with 81.8%selectivity of C_(15)–C_(18)hydrocarbons at 350℃under 7 MPa H_(2)pressure.This finding provides an insight into the development of efficient catalysts for the deoxygenation of fatty compounds to biofuels.
