Abstract
The pyrolysis process of plant biomass can be better understood by investigating the kinetic mechanism of the decomposition process of various components. Biomass can have different structures, thermophysical properties and chemical composition, which affects the kinetics of the pyrolysis process. (Research purpose) The research purpose is simulating and studying the kinetics of the pyrolysis process of corn cob particles, which allows to determine the rate of chemical reactions occurring during the decomposition of the material, and identifying the main factors affecting the rate and efficiency of pyrolysis. (Materials and methods) The biomass of corn cobs, which has a particle size of 0.02 square meters and has thermophysical properties, was used for analysis using Comsol multiphysics software. (Results and discussion) We have obtained models that describe temperature trends, especially the temperature in the center of biomass. It was shown that the temperature on the surface of the biomass reaches a peak of 727 Kelvin after 460 seconds; the temperature in the center of the biomass reaches 794 Kelvin after 433 seconds. It was shown that the activation energy and frequency coefficient are derived from the slope of the linear regression line and the intersection. (Conclusions) It was found that the process of pyrolysis of biomass of a corn cob particle occurred in the temperature range of 190-432 degrees Celsius; at a temperature of 190 degrees Celsius, the biomass began to lose mass, and the mass loss stopped at a temperature of 432 degrees Celsius. The kinetic parameters were calculated by the Kissinger method. The least squares method and correlation analysis were used to calculate kinetically constant parameters. It was stated that the results will be useful to optimize the process of pyrolysis of biomass. It was determined that in the Kissinger method the kinetic parameters were the same for the entire pyrolysis process; the correlation coefficient between temperature and heating rate in the model is 0.79.
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