Abstract：
In the catalytic transformation of bio-oil into liquid fuels having alkanes via hydrodeoxygenation (HDO), the acid and metal sites in the catalyst are pivotal for promoting the HDO of lignin-derived phenolic compounds. This study introduces a novel bifunctional catalyst comprising phosphomolybdenum-vanadium heteropolyacids (H4PMo11VO40) coupled with Ni/C. The HDO reaction of the model compound guaiacol was carried out under reaction conditions of 230 °C, revealing the superior performance of H4PMo11VO40 with Ni/C catalysts compared to the conventional acids, even at low dosage. The Keggin structure of H4PMo11VO40 provided a solid catalyst with strong acidic and redox properties, alongside advantages such as ease of synthesis, cost-effectiveness, and tunable acid and redox properties at the molecular level. Characterization of Ni/C and the prepared acid demonstrated favorable pore structure with a mesopore volume of 0.281 cm3/g and an average pore size of 3.404 nm, facilitating uniform distribution and catalytic activity of Ni-metal. Incorporating acid enhances the acidic sites, fostering synergistic interactions between metal and acidic sites within the catalyst, thereby significantly enhancing HDO performance. Guaiacol conversion at 230 °C reached 100%, with a cyclohexane selectivity of 89.3%. This study presents a promising pathway for converting lignin-derived phenolic compounds.
摘要：
在通过加氢脱氧（HDO）将生物油催化转化为具有烷烃的液体燃料中，催化剂中的酸和金属位点对于促进木质素衍生的酚类化合物的HDO是关键的。这项研究介绍了一种新型的双功能催化剂，该催化剂包含磷钼-钒杂多酸（H4PMo11VO40）和Ni/C。模型化合物愈创木酚的HDO反应在230℃的反应条件下进行,揭示了H4PMo11VO40与Ni/C催化剂相比于常规酸的优越性能，即使是低剂量.H4PMo11VO40的Keggin结构提供了具有强酸性和氧化还原性质的固体催化剂，除了容易合成等优点，成本效益，以及分子水平上可调的酸和氧化还原特性。Ni/C和制备的酸的表征显示出良好的孔结构，中孔体积为0.281cm3/g，平均孔径为3.404nm。有利于Ni金属的均匀分布和催化活性。掺入酸增强了酸性位点，促进催化剂内金属和酸性位点之间的协同相互作用，从而显著提高HDO性能。愈创木酚在230°C下的转化率达到100%,环己烷选择性为89.3%。这项研究提出了转化木质素衍生的酚类化合物的有希望的途径。
