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首页> 美国卫生研究院文献>Nanomaterials >Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu Mo P) Catalysts
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Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu Mo P) Catalysts

机译：用Ni / Al2O3和Ni-X / Al2O3（X = CuMoP）催化剂对甘油含氢产生的Guaiacol与原位氢产生的氢化

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Biomass-derived liquids, such as bio-oil obtained by fast pyrolysis, can be a valuable source of fuels and chemicals. However, these liquids have high oxygen and water content, needing further upgrading typically involving hydrotreating using H at high pressure and temperature. The harsh reaction conditions and use of expensive H have hindered the progress of this technology and led to the search for alternative processes. In this work, hydrogenation in aqueous phase is investigated using in-situ produced hydrogen from reforming of glycerol, a low-value by-product from biodiesel production, over Ni-based catalysts. Guaiacol was selected as a bio-oil model compound and high conversion (95%) to phenol and aromatic ring hydrogenation products was obtained over Ni/γ-Al O at 250 °C and 2-h reaction time. Seventy percent selectivity to cyclohexanol and cyclohexanone was achieved at this condition. Hydrogenation capacity of P and Mo modified Ni/γ-Al O was inhibited because more hydrogen undergoes methanation, while Cu showed a good performance in suppressing methane formation. These results demonstrate the feasibility of coupling aqueous phase reforming of glycerol with bio-oil hydrogenation, enabling the reaction to be carried out at lower temperatures and pressures and without the need for molecular H .
机译：生物质衍生的液体，例如通过快速分解获得的生物油，可以是燃料和化学品的有价值的源。然而，这些液体具有高氧和含水量，需要进一步升级，通常涉及在高压和温度下使用H的加氢处理。恶劣的反应条件和昂贵H的使用阻碍了该技术的进展，并导致寻找替代过程。在这项工作中，使用原位生产的氢气从甘油的重整，从生物柴油生产中的低价副产物，在基于Ni的催化剂中，使用原位生产的氢气进行氢化。选择GuaiaCol作为生物油模型化合物，并在250℃和2-H反应时间上通过Ni /γ-Al O获得苯酚和芳环氢化产物的高转化率（95％）。在该条件下实现了对环己醇和环己酮的百分比选择性。抑制p和Mo改性的Ni /γ-Al O的氢化容量，因为更多的氢经历甲烷化，而Cu在抑制甲烷的形成时表现出良好的性能。这些结果表明，用生物油氢化偶联甘油偶联水相重整的可行性，使反应能够在较低的温度和压力下进行，并且不需要分子h。

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