Interaction characteristics and mechanism in the fast co-pyrolysis of cellulose and lignin model compounds
Journal of Thermal Analysis and Calorimetry(2017)
摘要
During biomass fast pyrolysis process, the interactions among biomass components will affect the pyrolytic products distribution. In this study, d -glucose and a β-O-4 type lignin model dimer (LMD, 1-(4-hydroxy-3-methoxyphenyl)-2-(2-methoxyphenoxy)propane-1,3-diol) were selected as the model compounds of cellulose and lignin. The interaction characteristics and mechanism during their fast co-pyrolysis process were investigated by combined pyrolysis–gas chromatography/mass spectrometry (Py–GC/MS) experiments and density functional theory (DFT) calculations. The Py–GC/MS results indicated that during fast co-pyrolysis process, the presence of LMD significantly decreased the formation of levoglucosan (LG) from d -glucose, while promoted the formation of linear carbonyls and furans. Meanwhile, the presence of d -glucose enhanced the decomposition of LMD to generate phenolic compounds. The DFT calculations revealed that d -glucose would interact with a homolysis radical of LMD to form a ten-membered ring transition state. The formed complex transition state changed the energy barriers of certain pyrolytic reactions of d -glucose and LMD, thus affecting the pyrolytic products distribution.
更多查看译文
关键词
d-Glucose,Lignin model dimer,Interaction,Fast pyrolysis,Py–GC/MS,Density functional theory
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要