Ozonation of Pyrolytic Aqueous Phase: Changes in the Content of Phenolic Compounds and Color |
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| Authors: | Shi‐Shen Liaw Oselys Rodriguez Justo Victor Haber Perez Shuai Zhou Manuel Garcia‐Perez |
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| Affiliation: | 1. Washington State University, Biological Systems Engineering, Washington, USA.;2. Estácio de Sá University, Rio de Janeiro, Brazil.;3. State University of Northern of Rio de Janeiro, Processes Engineering Sector, Rio de Janeiro, Brazil. |
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| Abstract: | Ozonation on the phenols present in pyrolytic aqueous phases attained from biomass thermochemical conversion was evaluated. During ozonation, the dark color of original samples was found to decrease as a function of ozonation time. The oxidation kinetics of phenols was quantified by a method based on the color changes of samples. The oxidation profiles showed different behaviors and in some cases the phenols presented a positive correlation with the relative R color parameter, except eugenol, syringol, and vanillin which were markedly different. Finally, the color changes observed seem to be associated with the changes in the overall content of phenols and with the change in the molecular weight of the heavy fractions that include lignin oligomers. |
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| Keywords: | Bio‐oil Ozonation Phenol oxidation Phenolic compounds Pyrolytic aqueous phase |
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