关键词: 生物质, 热解, Ozawa方法, 三组分模型

Abstract:

The biomass pyrolysis process usually could be expressed by a threepseudocomponent modelThe value of reaction order in the traditional threepseudocomponent model is set as 1 or 3In this study, the kinetic parameters of three pseudocomponents (activation energy, prefactor and reaction order) were calculated from the threepseudocomponent model with undefined reaction order by the nonlinear least square fitting methodThe analysis result showed that the reaction order of cellulose decomposition was close to one, which agreed with the conclusions of other researchersThe reaction order of lignin decomposition was related to the type of biomass sample, and was close to one or threeThe most complex process was hemicellulose decompositionThe reaction order of hemicellulose decomposition changed in the range of 1.5 to 4Several threepeseudocomponent models based on the weight average activation energy calculated by the Ozawa method were comparedThe threepseudocomponent model with undefined reaction order was more accurate than the other two models to describe the biomass pyrolysis process.

Key words: 生物质, 热解, Ozawa方法, 三组分模型