Análises experimentais de resíduos glicéricos como subproduto da indústria de biodiesel

Abstract

The present work presents information on glycerol (also called pure glycerin) and glyceride residues (also called crude glycerin and blond glycerin) as by-products of the transesterification process for the production of biodiesel, and brief information on the production chain, commercialization and use of these two products. In addition, this paper also presents some experiments carried out at LAPICOL (Laboratory of Industrial Processes, Fuels and Lubricants), located in the laboratory building of the Energy Engineering course. The experiments in this work analyze the pH parameters, which demonstrates the acidity of the mixture, and corrosion, which seeks a better understanding of the corrosion process in pure glycerine and glyceride residues in different types of metals, and also proposes an assembly of a Stokes viscometer, to obtain the viscosities of the glycerins (crude, blonde and pure). To conclude, this work presents several aspects of the analysis of corrosion in metals, specific mass measurement, and measurement of pH and its by-products (glycerin), viscosity measurement (dynamic), which should be improved in the future in order to improve the work in the laboratory for teaching and research purposes. In the experiments, the results (consistent with the literature) were reached in corrosion and pH measurement, whereas in the viscometer a comparison with other viscosimeter models was necessary, since the results were below (contrary to literature) the expected results.