Research on water evaporation in the process of biomass pyrolysis

The first step of biomass pyrolysis corresponds to water evaporation. In the present short paper, the possibility of applying the Weibull model for description of water evaporation in the process of biomass pyrolysis has been investigated. The fitting of the mass loss data in the water evaporation step using the proposed model, which can overcome the noise problem involved in the data and make the data analysis easier, is perfect. Considering the dependence of the evaporation enthalpy of water on temperature, the heat flow from the water contributions has been calculated. The results have shown that the heat flow from heat capacity of not yet evaporated water is almost negligible compared to the heat flow from water evaporation.