Ni-Fe-Al Ldh Derived Ni-Fe Nanosheet for Green Diesel Production from Lipid Hydrotreatment

Abstract

In order to deal with the deficiency of active sites in Ni catalyst, Ni-Fe nanosheet (Ni-Fe/Al2O3-NS) catalyst was synthesized by using Ni-Fe-Al LDH as the precursor. The catalyst was further utilized in the lipid hydrotreatment for green diesel production. With a lamellar structure and large Ni loading (more than 60%), the Ni-Fe/Al2O3-NS catalyst possessed abundant Ni sties with high dispersion, large surface area, and strong acidity. Moreover, in Ni-Fe/Al2O3-NS the highly active Ni3Fe phase was formed, which promoted the decarbonylation route in hydrotreatment. The Ni-Fe/Al2O3-NS catalyst achieved 98.7% conversion with 98.7% alkane yield in oleic acid hydrotreatment under very mild conditions (220 ºC, 2 MPa of hydrogen pressure, 3 h). The catalytic performance of Ni-Fe/Al2O3-NS was much higher than traditional Ni-Fe/Al2O3 and other catalysts reported in current related studies.

Keywords: Bio-energy, 2D material, Deoxygenation, Second-generation bio-diesel