Analysis of numerical modeling methods of the thermal conversion of biomass of plant origin

An analysis of printed sources on the issue of numerical modeling of the process of gasification of biomass of plant origin was conducted.Taking into account the advantages and disadvantages, the use of gasifiers of the layered type of the reverse process for the production of synthesis gas was justified.The main approaches to numerical modeling of the process of gasification of biomass were considered, in particular the kinetic and thermodynamic equilibrium models.The bottlenecks in existing numerical models were analyzed, in particular their limitations in assumptions and limitations in covering all the necessary aspects for the accurate reproduction of real experimental data obtained on real raw materials.When studying the process of gasification of biomass, the prospects for the application of thermodynamic modeling were considered.At the same time, considerable attention was paid to the analysis of the kinetics and thermodynamics of processes, the influence of ash formation on reactions, as well as taking into account the uneven distribution of temperature and concentrations in the gasifier.Chemical reactions in gas generators are described through vector equations that take into account the complexity of interactions between biomass, air and the resulting gases.The system of equations involves the laws of mass balance, equilibrium and heat conservation.The method of successive approximations is used to predict the gas composition and thermodynamic parameters.In general, the work focuses on the shortcomings of existing numerical models of gas generation from biomass of plant origin, in particular, the lack of proper consideration of the influence of secondary reactions and the diversity of raw material properties.At the same time, further development of numerical modeling based on stoichiometric analysis, energy balances and improvement of the technical description of the process remains relevant and requires additional research.