Oxidative cracking of lignin for production of aromatics and organic acids under mild conditions
Alkali oxidative cracking with molecular oxygen was demonstrated to be an effective method to depolymerize lignin under moderate conditions.In this study,ammonia-extracted lignin from corn stover,which is a by-product from biomass pretreatment,was depolymerized by oxygen to value-added products.The identified products by GC-MS,NMR,and HPLC included mono-aromatic compounds(such as vanillin,p-coumaric acid,vanillic acid,acetovanillone etc.)and organic acids(such as oxalic,acetic,formic acids,etc.).The overall yield of quantified aromatics and organic acids varied from 24%to 58%under the investigated conditions.It was found that the yields and compositions of the products were dependent on the reaction conditions(temperature,reaction time,and oxygen).Oxygen played a crucial role in the lignin depolymerization,but excessive oxygen at high temperature led to further decomposition of the mono-aromatics to organic acids.
Gaojin Lyu Yu Liu Guihua Yang Jiachuan Chen
Key Lab of Pulp & Paper Science and Technology of the Ministry of Education Qilu University of Technology Jinan,Shandong 250353,China
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-4
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）