Abstract The bio-oil, produced via fast pyrolysis of biomass, can be used as substitute for transportation fuels after its subsequent upgrading. However, conventional upgrading of bio-oil faces serious problems of rapid catalyst deactivation and low conversion efficiency, due to the high unsaturation degree of bio-oil. In this study, the mild hydrogenation of simulated bio-oil over monometallic catalysts (Pd and Pt) and bimetallic catalysts (Pt-Fe, Pd-Fe, Pt-Ni and Pd-Ni) was performed, in order to increase the saturation degree. It was found that the addition of Ni could significantly facilitate the conversion of phenols. The maximum conversion of guaiacol and phenol over Pt-Ni/SiO 2 catalyst reached 97.8% and 99.6%, respectively. The introduction of Fe improved the conversion of AcOH by promoting the protonation of carbonyl group. Complete conversion of AcOH was achieved over Pt-Fe/SiO 2 catalyst. The upgraded product, of which the activity was significantly improved, was ready for subsequent upgrading for liquid fuel production.

中文翻译：

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通过双金属催化剂温和加氢改进模拟生物油的催化升级

摘要 生物质快速热解生产的生物油，经过升级改造后可作为交通运输燃料的替代品。然而，由于生物油的不饱和度高，传统的生物油改质面临着催化剂失活快、转化效率低的严重问题。本研究采用单金属催化剂（Pd 和 Pt）和双金属催化剂（Pt-Fe、Pd-Fe、Pt-Ni 和 Pd-Ni）对模拟生物油进行温和加氢，以提高饱和度. 发现Ni的加入可以显着促进苯酚的转化。Pt-Ni/SiO 2 催化剂上愈创木酚和苯酚的最大转化率分别达到97.8%和99.6%。Fe的引入通过促进羰基的质子化提高了AcOH的转化率。AcOH 的完全转化是在 Pt-Fe/SiO 2 催化剂上实现的。升级后的产品活性得到显着提高，可用于后续的液体燃料生产升级。