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Ozonation of Pyrolytic Aqueous Phase: Changes in the Content of Phenolic Compounds and Color
Author(s) -
Liaw ShiShen,
Justo Oselys Rodriguez,
Perez Victor Haber,
Zhou Shuai,
GarciaPerez Manuel
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500420
Subject(s) - phenols , vanillin , chemistry , pyrolytic carbon , lignin , aqueous solution , aqueous two phase system , guaiacol , eugenol , phenol , organic chemistry , chromatography , pyrolysis , catalysis
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.