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首页> 外文期刊>Catalysts >Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90
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Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90

机译：Pt / SiO 2 和Pt / H-MFI-90上对愈创木酚的连续催化加氢脱氧

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Hydrodeoxygenation of guaiacol in the presence of 1-octanol was studied in a fixed-bed reactor under mild conditions (50–250 °C) over platinum particles supported on silica (Pt/SiO2) and a zeolite with framework type MFI at a Si/Al-ratio of 45 (Pt/H-MFI-90). The deoxygenation selectivity strongly depended on the support and the temperature. Both guaiacol and octanol were rapidly deoxygenated in the presence of hydrogen over Pt/H-MFI-90 at 250 °C to cyclohexane and octane, respectively. In contrast, Pt/SiO2 mostly showed hydrogenation, but hardly any deoxygenation activity. The acidic sites of the MFI-90 support lead to improved deoxygenation performance at the mild temperature conditions of this study. Significant conversions under reaction conditions applied already occurred at temperatures of 200 °C. However, during long-term stability tests, the Pt/H-MFI-90 catalyst deactivated after more than 30 h, probably due to carbon deposition, whereas Pt/SiO2 was more stable. The catalytic activity of the zeolite catalyst could only partly be regained by calcination in air, as some of the acidic sites were lost.
机译：在1-辛醇存在下，在固定床反应器中，于温和条件下（50–250°C），对载于二氧化硅（Pt / SiO 2 ）和沸石上的铂颗粒进行了愈创木酚加氢脱氧研究框架类型为MFI的Si / Al比为45（Pt / H-MFI-90）。脱氧选择性很大程度上取决于载体和温度。愈创木酚和辛醇在氢气存在下于250°C的Pt / H-MFI-90上迅速脱氧成环己烷和辛烷。相比之下，Pt / SiO 2 主要表现出氢化作用，但几乎没有脱氧活性。 MFI-90载体的酸性位点可在本研究的温和温度条件下改善脱氧性能。在所应用的反应条件下，在200°C的温度下已经发生了明显的转化。然而，在长期稳定性测试中，Pt / H-MFI-90催化剂在超过30小时后失活，可能是由于碳沉积，而Pt / SiO 2 更稳定。沸石催化剂的催化活性只能通过在空气中煅烧而部分恢复，因为一些酸性位点会丢失。

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