Selective catalytic deoxygenation of 1-octanol from Fischer-Tropsch C10 mixed oil

Abstract

The selective catalytic deoxygenation of oxy-organics in Fischer-Tropsch mixed oil for its high value utilization is challenging. Herein, a BaCO₃/γ-Al₂O₃ catalyst was prepared calcining γ-Al₂O₃ with BaCO₃, and the acid-alkalinity of the catalyst was regulated by introducing alkaline Ba basic sties. In a continuous fixed-bed reactor with a feed mass space velocity of 1 h⁻¹ and reaction temperature of 330 °C, BaCO₃/γ-Al₂O₃ catalyst can efficiently catalyzed the deoxygenation removal of 1-octanol in Fischer-Tropsch C10 mixture oil. It also inhibited the isomerization of 1-decene in the C10 mixture. The catalytic deoxygenation kinetics of 1-octanol were also studied. The reaction was endothermic with an activation energy of 64 kJ·mol⁻¹ and a reaction order of 2. In addition, theoretical studies revealed the adsorption and activation of 1-decene on the Lewis acidic site and the alkaline Ba basic sites, 1-decene was more easily underwent isomerization into 2-decene at Lewis acid sites. This research provides a useful method to enable the industrial application of catalytic deoxygenation of alcohols in Fischer-Tropsch synthetic oil.