Pt-Sn/SAPO-11: A preferred high-performance, stable, and regenerable hydrogenation catalyst for Jatropha oil

The sustainable aviation fuel derived from Jatropha oil helps to reduce the dependence of the aviation industry on fossil energy and decrease total carbon emissions. To achieve efficient catalytic conversion of Jatropha oil without loading more precious metals, one-step catalytic hydrogenation of Jatropha oil to bio-jet fuel over La, Ce, Y, or Sn-doped Pt/SAPO-11 was studied in this paper. The characterization results from XRD, N 2 adsorption-desorption, TEM, and NH 3 -TPD showed that the catalytic activity of Pt-Sn/SAPO-11 was significantly better than that of other element-doped catalysts because Sn doping regulated the pore size of the support, promoted the dispersion of Pt particles, and balanced the relative distribution of metal active sites and acid sites. Moreover, Sn doping can stably maintain the high catalytic activity of Pt/SAPO-11 for up to 60 h. The simple calcination treatment can effectively remove the coke deposited during long-term service and restore the hydrodeoxygenation capacity of the catalyst to the initial level. However, the other ability to completely recover the Pt-Sn/SAPO-11 catalyst depends on the improvement of the regeneration process. This work will help to promote the value-added utilization of Jatropha oil and contribute to solving the competition between food and fuel. • Up to 67.69 % C 8 –C 16 alkanes were obtained from Jatropha oil catalyzed by Pt-Sn/SAPO-11. • Gross calorific value of the product oil catalyzed by Pt-Sn/SAPO-11 can reach 56.96 MJ/kg. • Sn doping can maintain the high catalytic activity of Pt/SAPO-11 within 60 h. • Calcination can restore the hydrodeoxygenation rate of the catalyst close to 100 %.