Highly selective catalytic hydrodeoxygenation of Cₐᵣₒₘₐₜᵢc–OH in bio-oil to cycloalkanes on a Ce–Ni–W–B amorphous catalyst
2014
Wang, Weiyan | Qiao, Zhiqiang | Zhang, Kun | Liu, Pengli | Yang, Yunquan | Wu, Kui
This study focused on the preparation of Ce–Ni–W–B amorphous catalysts and the effect of Ce content on their catalytic activities in the hydrodeoxygenation (HDO) of phenols in bio-oil. Adding the promoter Ce could increase the content of Ni⁰ and WO₃ on the Ce–Ni–W–B catalyst surface, leading to the improvement of the deoxygenation activity, but excess Ce would cover some active sites, resulting in a reduction of the catalytic activity. Because of the amorphous structure and the electron transfer between Ni⁰ and B⁰, these catalysts possess very high hydrogenation activity, making the HDO of phenols on these amorphous catalysts proceed with a hydrogenation-dehydration route, which not only decreases the aromatic content in the product but also the reaction temperature. With an optimal Ce content (2.5 mol%), the total aromatic selectivity reduced to 1.0% and the HDO reaction temperature decreased to 498 K. This research provides a high activity catalyst for transforming phenols into cycloalkanes.
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