Microwave-Assisted Oxidative Degradation of Lignin
Model Compounds with Metal Salts
- Publication date
- Publisher
Abstract
A systematic
study on microwave-assisted oxidative degradation
of lignin model compounds, such as 2-phenoxy-1-phenylethanol, vanillyl
alcohol, and 4-hydroxybenzyl alcohol, was performed by evaluating
the catalytic activity of 14 types of metal salts. The acidity of
each metal salt solution for the oxidative degradation of 2-phenoxy-1-phenylethanol,
vanillyl alcohol, and 4-hydroxybenzyl alcohol under the microwave
irradiation and conventional heating conditions was measured and compared.
The results showed that CrCl<sub>3</sub> and MnCl<sub>2</sub> were
the most effective for the degradation of the lignin model compounds.
The acidity of metal salt is in favor of the catalytic activity for
the degradation of 2-phenoxy-1-phenylethanol, vanillyl alcohol, and
4-hydroxybenzyl alcohol, and microwave irradiation is able to accelerate
the degradation rate in a large scale. The possible mechanisms for
the degradation of 2-phenoxy-1-phenylethanol, vanillyl alcohol, and
4-hydroxybenzyl alcohol are proposed on the basis of the product distributions
