Enhancing hydrodeoxygenation-isomerization of FAME over M-SAPO-11 in one-step process: Effect of in-situ isomorphic substitution of transition metals and synergy of PtxSny alloy

•Al from SAPO-11 is substituted by in-situ substitution of transition metals.•Fe3SAPO-11 shows a unique morphology and suitable pore structure properties.•A small particle of PtxSny alloy with high dispersion was prepared by using PVP.•Pt1Sn1 alloy shows a strong adsorption energy of H and PA by DFT calculation.•Pt1Sn1/Fe3SAPO-11 can run as long as 1300 h with a stable catalytic ability.