Simple experiment for modeling the reaction interface in solids decomposition




Geometric modeling; Reaction interface; Decomposition of solids; Naphthalene; Lamé’s curve.


In line with the concept of interdisciplinarity, the present work proposes a simple experiment to teach solid decomposition reactions, through the geometric evolution of naphthalene parallelepipeds submitted to sublimation. Geometric modeling of the specimen's face projections by the Lamé curves (also called superelipses) allows the calculation of the volume of the corresponding superelipsoid, resulting in adequate quantification of the evolution of the naphthalene sample mass.  The proposed experimental procedure has proved to be a simple and elucidative tool for carrying out practical classes in the laboratory, minimally equipped, aiming at learning both solid decomposition reactions and mathematical modeling techniques for heterogeneous reaction interfaces, using Lamé curves.

Author Biographies

Marcus Alexandre de Carvalho Winitskoski da Silveira, Secretaria Municipal de Meio Ambiente da Prefeitura de Belo Horizonte

Metallurgical Engineer from Federal University of Rio de Janeiro (2009), Specialist in Metallurgical Mining Systems from Federal University of Ouro Preto (UFOP) / Gorceix Foundation (2013), Master in Mineral Technology from the Postgraduate Program in Metallurgical Engineering and Materials at COPPE/UFRJ - Federal University of Rio de Janeiro (2012) and PhD in Mineral Engineering from the Postgraduate Program in Mineral Engineering at Federal University of Ouro Preto (2020). He worked as a collaborator in consulting projects linked to COPPE/UFRJ for almost 6 years (2005 to 2011) and as a process engineer at Vale S.A. for almost 4 years (2011 to 2015). He acquired proficiency in techniques for characterization of iron ores, aluminum, limestone, coal, etc. Has experience in coordinating projects of statistical variability study of new mineral resources for engineering projects, preparation of technical reports of technological research, development studies of new inputs (depressants/flocculants...) for plants, calcination process sizing, and optimization of mineral processing routines. He has teaching experience in Mining Engineering at Federal University of Ouro Preto (2015 to 2016) and at the State University of Minas Gerais (2021 to 2022). Currently works as an expert in environmental compliance analysis of industrial enterprises within the municipality of Belo Horizonte.

Jorge Carlos Guerrero Vargas, Universidad Federal de Ouro Preto

Has a degree in Mining Engineering from the Universidad Privada del Norte (2016). He has experience in the area of Mining Engineering. Master's degree (ongoing) in the Graduate Program in Mineral Engineering at the Federal University of Ouro Preto (PPGEM/UFOP).


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How to Cite

SILVEIRA, M. A. de C. W. da .; LUZ, J. A. M. da; GUERRERO VARGAS, J. C. . Simple experiment for modeling the reaction interface in solids decomposition. Research, Society and Development, [S. l.], v. 12, n. 1, p. e25812139805, 2023. DOI: 10.33448/rsd-v12i1.39805. Disponível em: Acesso em: 27 jan. 2023.