The Formation of Char, Gaseous and Liquid Products during Lignin Carbonization in Super‐ and Subcritical Solvents. Issue 9 (28th March 2017)

• Record Type: Journal Article
• Authors: Luo, Jia; Yang, Yating; Yang, Xingxia; Han, Bo; Bao, Guirong; Li, Jing
• Is Part Of: ChemistrySelect. Volume 2:Issue 9(2017)
• Page Start: 2828
• Page End: 2831
• Publication Date: 2017-03-28
• Subjects: Esters -- hydrogen -- lignin -- solvothermal carbonization -- supercritical ethanol; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201601931
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: The carbonization of lignin was performed using different solvents including ethanol, water and 50 vol % ethanol/water mixture under super‐ and subcritical conditions at 260 °C. The chars from lignin carbonization in supercritical ethanol provided low O/C ratio (0.09‐0.14) and considerable content of surface oxygen‐containing group (0.18‐0.32 mmol g −1 ). Supercritical ethanol substantially participated in lignin carbonization, while the activity of ethanol was also influenced by the chemical structure of lignin. High carbon recovery of 103.8 % for chars was obtained from dealkaline lignin with guaiacyl characteristics, accompained with the production of H2 and high valuable C6 ‐C10 esters. Abstract : Lignin carbonization in supercritical ethanol at 260 °C produces char with low O/C ratio (0.09‐0.14) and considerable oxygen‐containing group content (0.18‐0.32 mmol g −1 ). The activity of ethanol is influenced by lignin structure. High carbon recovery of 103.8 % for chars, H2 and C6 ‐C10 esters are obtained from lignin with guaiacyl characteristics.