SIMULADOR DE PROPIEDADES TERMODINÁMICAS EN LA CONVERSIÓN DE LA BIOMASA FORESTAL DE ASERRÍN DE PINO.

The chemical process simulators represent a competitive and functional tool that effectively supports the study of processes as complex as the thermochemical conversion of biomass, specifically in the modeling and simulation of the same. The programming modules of a simulator for systems in liquid- vapor equilibrium with excess thermodynamic properties, applied in forest biomass conversion processes such as pine saw (Pinus Arizonica), are designed and validated. The design involves the calculation of the equilibrium constant by the fi-gamma method with new computational tools for the prediction of the properties of the phases in equilibrium and the calculation of the activity coefficient based on the mathematical models of local composition NRTL, UNIQUAC, and UNIFAC. The Newton-Raphson method was chosen to solve computation subroutines. In the validation twelve (12) new components were incorporated into the library and sub-modules of the properties of the liquid and vapor phases. The estimation of the bubble and dew points for all methods yielded mean errors of less than 3%, and the composition of the vapor phase and the properties of the equilibrium phases did not exceed 10%. [ABSTRACT FROM AUTHOR]