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Effect of CoxO/m-Sep on Catalytic Oxidative Depolymerization of Sodium Lignosulfonate
Received:April 08, 2022  
DOI：DOI：10.11980/j.issn.0254-508X.2022.12.001
Key Words:sodium lignosulfonate  catalytic oxidative depolymerization  sepiolite  catalysts
Fund Project:国家重点研发计划（2019YFE0114600；2019YFB1503801）；湖南省自然科学基金青年项目（2021JJ41065）；长沙市自然科学基金项目（kq2014148）；中南林业科技大学引进人才科研启动基金项目（2019YJ029）。
Author NameAffiliationPostcode
SHENG Zhiyuan College of Materials Science and Engineering， Central South University of Forestry and Technology， Changsha， Hu'nan Province， 410004
Ministry of Forestry Bioethanol Research Center， Changsha， Hu'nan Province， 410004
Hunan Engineering Research Center for Woody Biomass Conversion， Changsha， Hu'nan Province， 410004
Hunan International Joint Lab of Woody Biomass Directed Conversion， Changsha， Hu'nan Province， 410004 		410004
SHAO Lishu* College of Materials Science and Engineering， Central South University of Forestry and Technology， Changsha， Hu'nan Province， 410004
Ministry of Forestry Bioethanol Research Center， Changsha， Hu'nan Province， 410004
Hunan Engineering Research Center for Woody Biomass Conversion， Changsha， Hu'nan Province， 410004
Hunan International Joint Lab of Woody Biomass Directed Conversion， Changsha， Hu'nan Province， 410004 		410004
ZHAN Peng College of Materials Science and Engineering， Central South University of Forestry and Technology， Changsha， Hu'nan Province， 410004
Ministry of Forestry Bioethanol Research Center， Changsha， Hu'nan Province， 410004
Hunan Engineering Research Center for Woody Biomass Conversion， Changsha， Hu'nan Province， 410004
Hunan International Joint Lab of Woody Biomass Directed Conversion， Changsha， Hu'nan Province， 410004 		410004
ZHANG Lin College of Materials Science and Engineering， Central South University of Forestry and Technology， Changsha， Hu'nan Province， 410004
Ministry of Forestry Bioethanol Research Center， Changsha， Hu'nan Province， 410004
Hunan Engineering Research Center for Woody Biomass Conversion， Changsha， Hu'nan Province， 410004
Hunan International Joint Lab of Woody Biomass Directed Conversion， Changsha， Hu'nan Province， 410004 		410004
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Abstract:Modified sepiolite supported cobalt-based catalysts （CoxO/m-Sep） were prepared and used in the oxidative depolymerization of sodium lignosulfonate （SLS）. The depolymerization performance of sodium lignosulfonate at reaction temperature， reaction time and initial oxygen pressure was investigated and the catalysts were characterized by scanning electron microscope （SEM）， X-ray powder diffraction （XRD）， specific surface area and porosity analyzer （BET）， fourier transform infrared spectroscopy （FT-IR） and X-ray photoelectron spectroscopy （XPS）. The results showed that the lignin conversion was 91.7% and the highest yield of ethyl acetate （EA） soluble products was 16.1% in the CoxO/m-Sep system at a reaction temperature of 200 ℃， a reaction time of 4 h and an initial reaction oxygen pressure of 1.0 MPa. The EA soluble products contained chemicals such as phenol， benzoic acid and diethyl succinate.
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