GOMES FILHO, J. C.; FILHO, JOÃO C. GOMES.; GOMES FILHO, J.C.; http://lattes.cnpq.br/5707743655747449; GOMES FILHO, João Correia.
Resumo:
The main sources of biofuel production from energy sources have been sought from many
alternatives of time, but also of great impetus, in the last decade, by the need to use oil and its
alternatives, having one for new sources. of vegetable oil and technologies that enable its
applications. The chichá (Sterculia striata) is a large tree, from 8 to 25 meters high, found in the
Brazilian Atlantic Forest, with rapid growth, resistant to low temperatures and different
altitudes. The seeds are cylindrical and flat with a black skin that comes off as it dries. It has up
to 42% oil in its kernel, being a potential application for the maintenance of oil mainly in Brazil.
In recent years, research can make the production of biodiesel, ethyl, technically and
economically viable. In this sense, much has been done regarding the reactional aspects of this
process. However, little has been researched aiming to solve the problems related to the
separation and purification steps. Knowing the behavior of the phases of the systems is vital for
the design, operation and control of these units. In order to carry out an adequate modeling of
biodiesel production, thermodynamic knowledge of the mixture, information from kinetic data
and use of considerations, when necessary, are necessary. This work reports experimental
results and thermodynamic modeling of the Liquid−Liquid Equilibrium (LLE) of the chicha
biodiesel (Sterculia striata) + glycerol + ethanol system. Binodal curves and tie-lines were
obtained at different temperatures (303,15, 318,15 e 333,15 K) and pressure (101,3 kPa). The
quality of the experimental data was made. Non-random two-liquid models (NRTL) and
analytical solutions of groups (ASOG) were used to correlate the LLE data. Both models fit the
experimental data well with root mean square (rmsd) deviations of no more than 1.5%.
