Catalytic oxidation of native lignin to phenolic monomers: Insight into aldehydes formation and stabilization

Yuzhen Hu; Song Li; Xuelai Zhao; Chenguang Wang; Xinghua Zhang; Jianguo Liu; Longlong Ma; Lungang Chen; Qi Zhang

Catalysis Communications (Dec 2022)

Catalytic oxidation of native lignin to phenolic monomers: Insight into aldehydes formation and stabilization

Yuzhen Hu,
Song Li,
Xuelai Zhao,
Chenguang Wang,
Xinghua Zhang,
Jianguo Liu,
Longlong Ma,
Lungang Chen,
Qi Zhang

Affiliations

Yuzhen Hu: Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
Song Li: Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China
Xuelai Zhao: Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 233022, PR China
Chenguang Wang: Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 233022, PR China
Xinghua Zhang: Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
Jianguo Liu: Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
Longlong Ma: Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
Lungang Chen: Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
Qi Zhang: Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China; Corresponding author.

Journal volume & issue: Vol. 172
p. 106532

Abstract

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The catalytic oxidation of lignin into phenolic monomers with aldehydes as the main products is very attractive but the yield of desired monomers is still limited. The aim of this work is to investigate the reaction pathway for the conversion of lignin to aldehydes and aldehydes stabilization in alkaline media. Studies on pure aldehydes stability revealed that over-oxidation to carboxylic acids and condensation are crucial factors of limited yield. A chemical protection method using aniline as the capping agent was applied to the depolymerization of real lignin and achieved the theoretical maximum monomer yield within 30 min at 160 °C.

Published in Catalysis Communications

ISSN: 1566-7367 (Print); 1873-3905 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/catalysis-communications

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