Hydrodeoxygenation (HDO) of guaiacol, a typical lignin-derived phenolic compound, at relatively mild conditions was studied over γ-Al₂O₃ and ZSM-5 supported catalysts with Ni and/or Co as active metal. Among various catalysts, NiCo/γ-Al₂O₃ catalysts exhibited better guaiacol conversion up to 96.1% with cyclohexanol as the main product in aqueous, due to the proper acidity and interaction between metal particles and support. The effects of process parameters on guaiacol conversion and product distribution were investigated in detail associated with solvent effect. The cleavage of C–O bonds in guaiacol was investigated over NiCo/γ-Al₂O₃ catalysts in aqueous phase. Phenol was found as the main intermediate with 1-methyl-1,2-cyclohexanediol as another intermediate instead of 2-methoxy-cyclohexanol. The demethoxylation first happened to form phenol, and then, the aromatic ring was hydrogenated to give cyclohexanol after further hydrogenation of cyclohexanone.

中文翻译：

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镍和钴双金属负载催化剂上愈创木酚的水辅助选择性加氢脱氧为环己醇

愈创木酚的加氢脱氧（HDO），一个典型的木质素衍生的酚类化合物，在相对温和的条件进行了研究以上的γ-Al ₂ ö ₃和ZSM-5载体催化剂与Ni和/或Co作为活性金属。在各种催化剂中，镍钴/γ-Al系₂ ö ₃催化剂在水溶液表现出更好的愈创木酚转化达96.1％环己醇具有作为主要产物，由于金属颗粒和载体之间的适当的酸性和相互作用。详细研究了与溶剂效应相关的工艺参数对愈创木酚转化率和产物分布的影响。的C-O键在愈创木酚的裂解进行了研究以上镍钴/γ-Al系₂ ö ₃在水相中的催化剂。发现苯酚是主要中间体，用1-甲基-1，2-环己二醇代替2-甲氧基-环己醇作为另一种中间体。首先发生脱甲氧基化反应生成苯酚，然后在环己酮进一步氢化后将芳环氢化生成环己醇。