Converting lignin into long‐chain fatty acids with the electro‐Fenton reaction

GCB Bioenergy

卷:13

Shuai Zhang¹  Shulin Chen¹  Le Gao²  Dongyuan Zhang²  Bowen Liu²  Mingyue Ge²  Zhaokun Zhang² 

[1] Department of Biological Systems Engineering Washington State University Pullman WA USA;

[2] Tianjin Key Laboratory of Industrial Biosystem and Bioprocess Engineering Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesNational Technology Innovation Center of Synthetic Biology Tianjin PR China;

关键词: advanced biofuels;    electro‐Fenton reaction;    fatty acid;    Kolbe reaction;    lignin;    lignocellulosic biomass;   

DOI  :  10.1111/gcbb.12859

来源: DOAJ

【 摘 要 】

Abstract The lack of effective lignin valorization technology remains a major barrier to utilize lignocellulose for producing biofuels and biochemicals. In this work, a new technology via the three‐phase three‐dimensional electro‐Fenton reaction was employed for the first time to convert lignin or its derived aromatics. The operating parameters were optimized by central composite design, which was controlled to prompt the synthesis of long‐chain fatty acids from lignin instead of degrading lignin to CO2. Under the optimized condition, the yields of palmitic acid and octadecanoic acid from lignin reached 138.41 and 112.31 mg/g, respectively. Key intermediators were identified during the electrolysis of lignin model compound using gas chromatography–quantitative time of flight mass spectrometry. The mechanism for the production of long‐chain fatty acids from lignin was proposed. Lignin successively underwent degradation, opening ring, and couple reactions and produced free radicals. This study is the first to report the conversion of lignin into the precursor of biodiesel or advanced biofuels through electro‐Fenton electrolysis at room temperature and atmosphere pressure. This study provides an environment‐friendly route for direct conversion of lignin into high‐value added products as a new strategy to valorize this undervalued component in lignocellulosic biomass.

【 授权许可】

Unknown