Abstract Catalytic fast pyrolysis of hydrolysis lignin was investigated in a drop-tube fixed bed reactor at different temperatures ranging between 400–800 °C using zeolite X as a catalyst for the production of phenolic chemicals. The yield of low molecular weight monomeric phenolics increased considerably while increasing the pyrolysis temperature from 400 °C to 450 °C, but decreased with further increasing the pyrolysis temperature. Zeolite X remarkably increased the yield of monomeric phenolic compounds in the catalytic fast pyrolysis of hydrolysis lignin at all temperatures (400–800 °C) compared to fast pyrolysis. No significant changes were observed in the catalyst properties (crystallinity and textural structure) during fast pyrolysis of lignin. The superb activity of the zeolite X catalyst might be owing to its strong acidity and low pore volume. Under the best reaction conditions tested in this study (450 °C, with zeolite X catalyst), the bio-oil yield was 50.5% in relation to the dry lignin, and the content of monomeric phenolics (mainly guaiacol, syringol, 4-methoxy-3-(methoxymethyl) phenol and metoxyeugenol) was 146.2 mg/g of bio-oil.

中文翻译：

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通过催化快速热解从水解木质素生产酚类化学品

摘要 使用沸石 X 作为生产酚类化学品的催化剂，在 400-800 °C 的不同温度下，在滴管固定床反应器中研究了水解木质素的催化快速热解。当热解温度从 400 ℃提高到 450 ℃时，低分子量单体酚醛的产率显着增加，但随着热解温度的进一步升高而降低。与快速热解相比，沸石 X 在水解木质素的催化快速热解中在所有温度（400-800°C）中显着提高了单体酚类化合物的产率。在木质素的快速热解过程中，未观察到催化剂性质（结晶度和质地结构）的显着变化。沸石 X 催化剂的卓越活性可能是由于其强酸性和低孔体积。在本研究测试的最佳反应条件下（450 °C，使用沸石 X 催化剂），相对于干木质素，生物油收率为 50.5%，单体酚类物质（主要是愈创木酚、丁香酚、4-甲氧基-3-(甲氧基甲基)苯酚和甲氧基丁香酚)为146.2mg/g生物油。