Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/346802
Type: Artigo
Title: Study of lactic acid thermal behavior using thermoanalytical techniques
Author: Martinez, Patricia Fazzio Martins
Lunelli, Betânia Hoss
Oliveira, Johnatt
Maciel, Maria Regina Wolf
Maciel Filho, Rubens
Abstract: Actually, there is a growing interest in the biotechnological production of lactic acid by fermentation aiming to substitute fossil fuel routes. The development of an efficient method for its separation and purification from fermentation broth is very important to assure the economic viability of production. Due to its high reactivity and tendency to decompose at high temperatures, the study of lactic acid thermal behavior is essential for its separation processes and potential application. In the present study, differential scanning calorimetry (DSC) analyses showed endothermic peaks related to the process of evaporation. Data of thermogravimetry (TG/DTG) were correlated to Arrhenius and Kissinger equations to provide the evaporation kinetic parameters and used to determine the vaporization enthalpy. Activation energies were 51.08 and 48.37 kJ·mol−1 and frequency values were 859.97 and 968.81 s−1 obtained by Arrhenius and Kissinger equations, respectively. Thermogravimetry, coupled with mass spectroscopy (TG-MS), provided useful information about decomposition products when lactic acid was heated at 573 K for approximately 30 min.
Subject: Ácido lático
Country: Reino Unido
Editor: Hindawi
Rights: Aberto
Identifier DOI: 10.1155/2017/4149592
Address: https://www.hindawi.com/journals/jchem/2017/4149592/
Date Issue: 2017
Appears in Collections:FEQ - Artigos e Outros Documentos

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