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Comparative study on pyrolysis kinetics of agroforestry biomass based on distributed activation energy model method

摘要:Pyrolysis behavior and kinetics of three typical agroforestry biomasses including apricot shell, wheat straw and poplar sawdust were investigated by thermogravimetric mass spectrometry (TG-MS). The results show that the differences of the main components make the three biomasses exhibit different characteristics in the main reaction range (200-450 ℃). It is found that the average activation energy of apricot shell, straw and sawdust is 188.22, 220.77, and 175.87 kJ/mol, respectively based on the typical isoconversional methods. The average activation energy of each component in biomass was calculated by the distributed activation energy model (DAEM) method, indicating that there is a fourth component with high average activation energy in biomass (297.44 kJ/mol for apricot shell, 284.35 kJ/mol for straw and 309.96 kJ/mol for sawdust). The activation energy of hemicellulose and cellulose shows an increasing order of straw < apricot shell < sawdust. The two kinds of kinetics methods are complementary to each other. The overall calculation results by the isoconversional method are close to those by the single-component distributed activation energy model method, but the isoconversional method is simpler; while the distributed activation energy model method can be used to obtain the kinetic parameters of different components of raw materials, which makes up for the deficiency of the isoconversional method. A combined use of the two methods can form a more comprehensive understanding of the pyrolysis reaction. ? 2022 Science Press. All rights reserved.

ISSN号:2097-213X

卷、期、页:卷50期7:808-823

发表日期:2022-07-01

期刊分区(SCI为中科院分区):无

收录情况:EI(工程索引)

发表期刊名称:Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology

参与作者:刘明华

通讯作者:乔沛,郭子千

第一作者:张玉明,李家州,张炜

论文类型:期刊论文

论文概要:乔沛,郭子千,张玉明,李家州,张炜,刘明华,Comparative study on pyrolysis kinetics of agroforestry biomass based on distributed activation energy model method,Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology,2022,卷50期7:808-823

论文题目:Comparative study on pyrolysis kinetics of agroforestry biomass based on distributed activation energy model method

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