Abstract
Biomass energy utilization can solve the contradiction between economic development and energy and environment. Biomass pyrolysis technology is not only one of the thermochemical conversion technologies, but also the necessary stage of biomass gasification, which has become a hot academic research topic. Firstly, based on the pyrolysis experimental data of cellulose, hemicellulose and lignin, the analytical expressions of pyrolysis gas mass yields of different biomass components varying with temperature were obtained; then, the prediction of pyrolysis products was obtained by mass component superposition method, and the correction coefficient of biomass pyrolysis gas yield model was obtained based on the comparison between the average yield of biomass pyrolysis gas and the predicted value of pyrolysis products; finally, the gas release mechanism model of biomass pyrolysis was obtained. This study provides theoretical basis and technical support for the development of biomass utilization technology.
Highlights
With the depletion of fossil fuel resources and increasing environmental problems, how to alleviate the contradiction between economic development and energy and the environment has become a problem that all countries in the world must face
This paper is based on the pyrolysis gas production data of three components of biomass, cellulose, hemicellulose and lignin provided by reference[1]
The relationship between temperature change and mass fraction of volatile gases produced by three components was obtained by data fitting method; secondly, the prediction of pyrolysis products was obtained by mass component superposition method; the revision coefficients of the model for the biology of elemental analysis was obtained by comparing the average yield of pyrolysis gases with the prediction of pyrolysis products
Summary
With the depletion of fossil fuel resources and increasing environmental problems, how to alleviate the contradiction between economic development and energy and the environment has become a problem that all countries in the world must face. Gasification and pyrolysis are the two main thermochemical conversion technologies. As one of the most important biomass thermochemical conversion technologies, pyrolysis is a necessary stage of biomass gasification, has become a hot academic research topic. Due to the complex relationship between the composition and yield of pyrolysis products and biomass composition, pyrolysis temperature and heating rate, there is no universally recognized release mechanism for pyrolysis products. The relationship between temperature change and mass fraction of volatile gases produced by three components was obtained by data fitting method; secondly, the prediction of pyrolysis products was obtained by mass component superposition method; the revision coefficients of the model for the biology of elemental analysis was obtained by comparing the average yield of pyrolysis gases with the prediction of pyrolysis products. The model for volatile gas evolution from biomass pyrolysis considering the influence of three components is obtained
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