Mechanistic Aspects of Hydrodeoxygenation of p -Methylguaiacol over Rh/Silica and Pt/Silica
Mechanistic Aspects of Hydrodeoxygenation of p -Methylguaiacol over Rh/Silica and Pt/Silica
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Rh/二氧化硅和 Pt/二氧化硅上对甲基愈创木酚加氢脱氧的机理
DOI：
10.1021/acs.oprd.8b00211
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发表时间：
2018
影响因子：
3.4
通讯作者：
Bouxin F
中科院分区：
文献类型：
--
作者：
Bouxin F
在300 °C和4 barg氢气下，考察了两种Rh/SiO2催化剂和一种Pt/SiO2催化剂上对甲基愈创木酚（PMG）加氢脱氧（HDO）的机理。PMG向4-甲基邻苯二酚的顺序转化之后是间甲酚和对甲酚的形成，最后是甲苯的生产，尽管PMG顶甲酚的直接转化优于商业Rh/二氧化硅催化剂。脱羟基化和氢化被示出发生在金属功能上，而脱甲基化和脱甲氧基化比气相二氧化硅载体更有利。提出了PMG的HDO机理途径。
The mechanism ofp-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 bym- andp-cresol formation and finally toluene production, although direct conversion of PMG top-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.