木质纤维生物质热解及中间产物缩合机理研究进展

Research progress on mechanism of lignocellulose pyrolysis and intermediates condensation

系统地介绍了木质纤维生物质中纤维素、半纤维素和木质素的热解机理,分析了生物质热解产生的中间产物,并讨论了中间产物的再缩合过程。纤维素、半纤维素和木质素热解后可以得到合成气、脂肪族含氧化合物、呋喃类化合物和芳香族化合物等。除合成气外,其余几种产物之间和自身都可能发生缩合,产生化学性质十分稳定的缩合产物。最后,基于中间产物缩合抑制策略,对提高生物质热解效率进行了展望。

Pyrolysis mechanisms of cellulose,hemicellulose and lignin in lignocellulose are introduced systemically.The intermediates generated from lignocellulose pyrolysis are analyzed and the re-condensation processes of the intermediates are discussed. Syngas,aliphatic oxides,furan derivative oxides and aromatic compounds can be obtained from pyrolysis of lignocellulose.In addition to syngas,each intermediate may condense with each other and themselves to generate stable condensation products. Based on the condensation inhibition of intermediate products,improvement strategies of biomass pyrolysis are prospected.