Spray pyrolysis synthesis of bimetallic NiMo/Al2O3–TiO2 catalyst for hydrodeoxygenation of guaiacol: Effects of bimetallic composition and reduction temperature

다국어 초록 (Multilingual Abstract)

Catalytic hydrodeoxygenation (HDO) is a process for removing of oxygen from oxygen-containingcompounds using a catalyst. In this study, spherical bimetallic NiMo/Al2O3–TiO2 catalysts with differentNi/Mo ratios were successfully synthesized by combining sol–gel method and continuousflow spraypyrolysis process. The prepared catalysts were characterized by N2 adsorption–desorption, TEM, SEM,XRD, XPS, H2-TPR and NH3-TPD analyses. The catalysts were then applied for HDO of guaiacol as a modelcompound using afixed-bed reactor. The effects of bimetallic compositions and reduction temperatureson HDO conversion of guaiacol as well as their product distributions were systematically investigated.
The obtained results showed that bimetallic NiMo/Al2O3–TiO2 exhibited higher HDO conversion thanmonometallic catalysts (Ni/Al2O3–TiO2 or Mo/Al2O3–TiO2). The highest HDO conversion of 98% with 100%hydrocarbon selectivity (85% cyclohexane, 13% methylcyclohexane and 2% toluene) was obtained over(10 wt% Ni and 20 wt% Mo)/Al2O3–TiO2 catalyst. In addition, the catalyst maintained a good catalyticstability for 24 h of reaction time, suggesting that spray pyrolysis derived NiMo/Al2O3–TiO2 catalyst canbe a promising catalyst for HDO performance.

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