α-Oxidation of banana lignin with atmospheric oxygen catalyzed by Co3O4

文献情報

出版日 2021-03-24

DOI 10.1039/D1RE00053E

インパクトファクター 4.239

著者

Carlos Augusto Cabral Kramer, Luciene Santos de Carvalho

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要旨

Lignin is an important macromolecule present in biomass, and its structure contains a great diversity of aromatic rings and organic chains that can potentially be converted into smaller molecules with high added value. Several methods for the derivatization of lignin are considered in the literature; however, they come up against the high recalcitrance of lignin. As an alternative, oxidation of α-hydroxyls, as a preliminary step, facilitates the breakdown of its polymeric chain. An efficient oxidative method was developed in this work, consisting of the oxidation of banana organosolv lignin via atmospheric oxygen gas in the presence of Co3O4 as a heterogeneous catalyst at a temperature of 80 °C and ambient pressure. The ideal concentration of the catalyst is 1% (mol/mol), which after 54 hours of reaction was sufficient for the maximum growth of the intensity of the carbonyl band at 1710 cm−1 (by FTIR), increasing the transmittance by 0.32%. A decrease in intensity by 0.31% of the band at 3400–3430 cm−1 is also observed (hydroxyls), confirming the effectiveness of the method and the conversion capacity of the catalyst. The non-appearance/intensification of other bands is attributed to the good selectivity of Co3O4.

掲載誌

Reaction Chemistry & Engineering

CiteScore: 0

自己引用率: 8.8%

年間論文数: 284

Reaction Chemistry & Engineering is an interdisciplinary journal reporting cutting-edge research focused on enhancing the understanding and efficiency of reactions. Reaction engineering leverages the interface where fundamental molecular chemistry meets chemical engineering and technology. Challenges in chemistry can be overcome by the application of new technologies, while engineers may find improved solutions for process development from the latest developments in reaction chemistry. Reaction Chemistry & Engineering is a unique forum for researchers whose interests span the broad areas of chemical engineering and chemical sciences to come together in solving problems of importance to wider society. All papers should be written to be approachable by readers across the engineering and chemical sciences. Papers that consider multiple scales, from the laboratory up to and including plant scale, are particularly encouraged.