Depolymerization of lignin by wet air oxidation

Sibel Irmak; Juhyon Kang; Mark Wilkins

doi:10.1016/j.biteb.2019.100377

Depolymerization of lignin by wet air oxidation

Sibel Irmak, Juhyon Kang, Mark Wilkins

Agricultural & Biological Engineering

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

In the present study, effect of temperature (150–250 °C) and pressure (500–1500 psi) was investigated for depolymerization of lignin by wet air oxidation (WAO). Commercial alkali lignin was used as representative lignin material. The degradation/oxidation products of WAO treatments were identified to understand the potential value of the depolymerization products. Depolymerization efficiency of alkali lignin was also compared to lignin extracted from corn stover and eastern redcedar (cedar) under the same WAO condition. Isovanillic acid was found to be the main product of WAO at 150 °C and 1000 psi oxygen conditions. The higher temperature (200 and 250 °C) and higher oxygen pressure (1000 and 1500 psi) conditions led to formation of more oxidized products, mostly carboxylic acid-derived compounds. The results showed that alkali lignin was more vulnerable to depolymerization compared to the lignins extracted from corn stover and cedar.

Original language	English (US)
Article number	100377
Journal	Bioresource Technology Reports
Volume	9
DOIs	https://doi.org/10.1016/j.biteb.2019.100377
State	Published - Feb 2020

All Science Journal Classification (ASJC) codes

Bioengineering
Renewable Energy, Sustainability and the Environment
Environmental Engineering
Waste Management and Disposal

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biteb.2019.100377

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title = "Depolymerization of lignin by wet air oxidation",

abstract = "In the present study, effect of temperature (150–250 °C) and pressure (500–1500 psi) was investigated for depolymerization of lignin by wet air oxidation (WAO). Commercial alkali lignin was used as representative lignin material. The degradation/oxidation products of WAO treatments were identified to understand the potential value of the depolymerization products. Depolymerization efficiency of alkali lignin was also compared to lignin extracted from corn stover and eastern redcedar (cedar) under the same WAO condition. Isovanillic acid was found to be the main product of WAO at 150 °C and 1000 psi oxygen conditions. The higher temperature (200 and 250 °C) and higher oxygen pressure (1000 and 1500 psi) conditions led to formation of more oxidized products, mostly carboxylic acid-derived compounds. The results showed that alkali lignin was more vulnerable to depolymerization compared to the lignins extracted from corn stover and cedar.",

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T1 - Depolymerization of lignin by wet air oxidation

AU - Irmak, Sibel

AU - Kang, Juhyon

AU - Wilkins, Mark

PY - 2020/2

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N2 - In the present study, effect of temperature (150–250 °C) and pressure (500–1500 psi) was investigated for depolymerization of lignin by wet air oxidation (WAO). Commercial alkali lignin was used as representative lignin material. The degradation/oxidation products of WAO treatments were identified to understand the potential value of the depolymerization products. Depolymerization efficiency of alkali lignin was also compared to lignin extracted from corn stover and eastern redcedar (cedar) under the same WAO condition. Isovanillic acid was found to be the main product of WAO at 150 °C and 1000 psi oxygen conditions. The higher temperature (200 and 250 °C) and higher oxygen pressure (1000 and 1500 psi) conditions led to formation of more oxidized products, mostly carboxylic acid-derived compounds. The results showed that alkali lignin was more vulnerable to depolymerization compared to the lignins extracted from corn stover and cedar.

AB - In the present study, effect of temperature (150–250 °C) and pressure (500–1500 psi) was investigated for depolymerization of lignin by wet air oxidation (WAO). Commercial alkali lignin was used as representative lignin material. The degradation/oxidation products of WAO treatments were identified to understand the potential value of the depolymerization products. Depolymerization efficiency of alkali lignin was also compared to lignin extracted from corn stover and eastern redcedar (cedar) under the same WAO condition. Isovanillic acid was found to be the main product of WAO at 150 °C and 1000 psi oxygen conditions. The higher temperature (200 and 250 °C) and higher oxygen pressure (1000 and 1500 psi) conditions led to formation of more oxidized products, mostly carboxylic acid-derived compounds. The results showed that alkali lignin was more vulnerable to depolymerization compared to the lignins extracted from corn stover and cedar.

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Depolymerization of lignin by wet air oxidation

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

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