Abstract

Different reaction conditions on the conversion of lignin and monophenol yield were investigated under the catalysis of (5% Mo)-Al₂O₃-ZrO₂; the maximum conversion rate (78.9%) and monophenol yield (31.9%) were observed at 350 °C and 0.2 g catalyst using iso-propanol, in 45 min. The GC–MS analysis revealed that the main alkyl-substituted phenols are 4-ethyl-phenol (17.7%), 4-methyl-phenol (2.303%), phenol (1.878%), etc. The ¹H NMR and FT-IR results indicated the presence of alkyl-substituted phenols in liquefaction products, and the formation mechanism of alkyl-substituted phenols was also proposed.

Graphic abstract

中文翻译：

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Mo掺杂的Al 2 O 3 -ZrO 2基复合材料作为催化剂，通过直接脱氧从木质素一步生产烷基取代的单酚

摘要

在（5％Mo）-Al ₂ O ₃ -ZrO ₂催化下，研究了不同的反应条件对木质素转化率和单酚产率的影响。在350°C和使用异丙醇0.2 g的催化剂在45分钟内观察到最大转化率（78.9％）和单酚产率（31.9％）。GC-MS分析表明，主要的烷基取代酚是4-乙基苯酚（17.7％），4-甲基苯酚（2.303％），苯酚（1.878％）等^。1 H NMR和FT-IR结果表明液化产物中存在烷基取代酚，并提出了烷基取代酚的形成机理。

图形摘要