Synthesis of renewable hydrocarbons from vegetable oil feedstock by hydrotreatment over selective sulfur-free SiO2-Al2O3 supported monometallic Pd, Pt, Ru, Ni, Mo and bimetallic NiMo catalysts

FUEL

卷:285

Article

Malins, Kristaps¹ 

[1] Riga Tech Univ, Inst Appl Chem, Paula Valdena Str 3, LV-1048 Riga, Latvia

关键词: Free fatty acids;    Green diesel;    Mo promoted;    Ni and noble metal catalysts;    Deoxygenation;    Hydrotreatment;   

DOI  :  10.1016/j.fuel.2020.119129

来源: Elsevier

【 摘 要 】

Screening tests of commercial and prepared monometallic Ni, Mo, Pd, Pt, Ru and bimetallic NiMo catalysts synthesized by four different impregnation methods were performed to evaluate their selectivity and performance on hydrocarbon production from vegetable oil feedstock with high free fatty acid (FFA) content (similar to 50%) by solvent-free hydrotreatment (HT). Catalysts were characterized by N2 sorption analysis, XRF, XRD, FE-SEM and TEM. Composition of feedstock and liquid, gaseous products were analyzed by C, H, N, S elemental analysis, FT-IR, GC-FID, GC-MS and GC-TCD. Mo promoted Ni17Mo3DP synthesized using developed one-pot deposition-precipitation procedure exhibits great performance, selectivity to n-C18 and 6-7% higher hydrocarbon yield (similar to 87%) than elevated metal loading (>= 65%) commercial Ni65C and Ni66C catalysts achieved at relatively mild reaction temperature 320-340 degrees C and initial H-2 pressure 6-10 MPa. Completely different selectivity of highly active Ru, Ni and NiMo catalysts can be beneficial for wide molecular weight marketable renewable hydrocarbon production from fatty acid containing raw materials.

【 授权许可】

Free