Aqueous-phase hydrodeoxygenation of highly oxygenated aromatics on platinum

Jin Yang, C. Luke Williams, Ashwin Ramasubramaniam, Paul J. Dauenhauer

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31 Scopus citations


Utilization of renewable sugars from biomass by a hybrid chemical process produces highly oxygenated aromatic compounds, such as phloroglucinol, which require catalytic reduction for desirable aromatic products. Aqueous phase hydrodeoxygenation of phloroglucinol on carbon-supported platinum produces resorcinol, phenol, cyclohexanol, cyclohexanone, and 1,3-cyclohexanediol by combinations of carbon-oxygen bond cleavage and carbon-carbon double bond hydrogenation. Carbon-carbon σ-bond cleavage was not observed. Hydrodeoxygenation was the primary reaction of phloroglucinol, leading to the production of resorcinol in the overall rate-limiting reaction, with an activation energy barrier of Ea = 117 kJ mol-1. Subsequent reactions of resorcinol produced 1,3-cyclohexanediol and phenol with similar energy barriers, Ea = 46 and Ea = 54 kJ mol-1, respectively. Further hydrogenation of phenol (Ea = 42 kJ mol -1) occurs through the intermediate, cyclohexanone, which is further reduced (Ea = 14 kJ mol-1) to the dominant product, cyclohexanol.

Original languageEnglish (US)
Pages (from-to)675-682
Number of pages8
JournalGreen Chemistry
Issue number2
StatePublished - Feb 1 2014


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