生物质液相解聚残渣热解行为对比研究

Comparative Study on Pyrolysis Behavior of Biomass Liquid Depolymerization Residues

解聚残渣是生物质在酸催化转化制取平台化合物过程中形成的固体副产物。本次研究发现三种衍生自玉米杆(H-CS)、柳桉(H-ES)、樟子松(H-PS)的解聚残渣都是富含苯环和呋喃环的复杂聚合物,其碳含量超过68%。基于DG-DAEM的热裂解宏观动力学特性模拟表明H-CS降解平行反应具有更低的活化能(144.7 kJ/mol),而缩合平行反应是HCS的主导反应。此外,还使用PY-GC/MS和TG-TOF-MS对热解产物的逸出行为进行了分析,得到解聚残渣中典型化学结构与热解行为之间的关联。

Depolymerization residue is a solid by-product formed in the process of acid catalytic conversion of biomass to platform compounds.It was found that three depolymerization residues derived from corn stalk(H-CS),Eucalyptus(H-ES)and Pinus sylvestris(H-PS)were complex polymers rich in benzene ring and furan ring,and their carbon content was more than 68%.The simulation of pyrolysis kinetics based on DG-DAEM showed that the parallel reaction of H-CS degradation has lower activation energy(144.7 kJ/mol),and the parallel reaction of condensation is the dominant reaction of H-CS.In addition,Py-GC/MS and TG-TOF-MS were used to analyze the escape behavior of the pyrolysis products,and the correlation between the typical chemical structure of the depolymerized residue and the pyrolysis behavior was obtained.