The mechanism of p-methylguaiacol (PMG) hydrodeoxygenation (HDO) has been examined over two Rh/silica catalysts and a Pt/silica catalyst at 300 °C and 4 barg hydrogen. Sequential conversion of PMG to 4-methylcatechol is followed by m- and p-cresol formation and finally toluene production, although direct conversion of PMG to p-cresol is favored over a commercial Rh/silica catalyst. Dehydroxylation and hydrogenation are shown to occur over metal functions, while demethylation and demethoxylation are favored over the fumed silica support. A mechanistic pathway for HDO of PMG is proposed.

中文翻译：

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对-甲基愈创木酚在Rh /二氧化硅和Pt /二氧化硅上加氢脱氧的机理

的机构p -methylguaiacol（PMG）加氢脱氧（HDO）已审查了两个的Rh /二氧化硅催化剂，并在300℃的Pt /二氧化硅催化剂和4巴氢气。到4-甲基PMG的连续转换之后是米-和p甲酚形成和最后甲苯生产，虽然到PMG的直接转换p甲酚是优于市售的Rh /二氧化硅催化剂。已表明脱羟基和氢化发生在金属功能之上，而脱甲基和脱甲氧基则优于气相法二氧化硅载体。提出了PMG HDO的机械化途径。