Thermal degradation of monoethylene glycol in aqueous saline solution: evaluation by thermogravimetric and physicochemical analyses

dc.contributor.authorChiavone Filho, Osvaldo
dc.contributor.authorMonteiro, Mateus Fernandes
dc.contributor.authorMoura Neto, Mário Hermes de
dc.contributor.authorMacedo, G. M.
dc.contributor.authorSilva, G. V.
dc.contributor.authorSilva, Dannielle Janainne
dc.contributor.authorPereira, L. S.
dc.contributor.authorNascimento, J. F.
dc.date.accessioned2021-11-12T15:08:45Z
dc.date.issued2019-06-11
dc.description.embargo2030-12-30
dc.description.resumoIn order to represent the thermal effects of the operational conditions of a monoethylene glycol (MEG) regeneration unit, 86 wt % MEG aqueous solutions with salt concentrations up to 5.52 wt % were heated for 56 h in an ebulliometer. Seven analytical techniques were applied to the samples, aiming to evaluate MEG degradation. Results demonstrated that increasing the sodium chloride concentration from 0 to 5.52 wt % reduced the MEG thermal stability time from 44 to 8 h. Thermogravimetric analysis was the most adequate studied technique to quantify MEG thermal degradation. Measurements of MEG degradation were correlated, using an allometric expression for each sodium chloride concentration. The salt-free solutions presented 7.2% MEG degradation after 56 h heating, while for 5.52 wt % NaCl it increased to 21.1%. As expected, sodium chloride concentration and time of exposure to temperatures up to 140 °C are important variables for monitoring MEG thermal degradation, especially in the flash evaporatorpt_BR
dc.identifier.citationMONTEIRO, M. F.; MOURA-NETO, M. H.; MACEDO, G. M.; SILVA, G. V.; SILVA, D. J.; PEREIRA, L. S.; NASCIMENTO, J. F. ; CHIAVONE-FILHO, O. . Thermal Degradation of Monoethylene Glycol in Aqueous Saline Solution: Evaluation by Thermogravimetric and Physicochemical Analyses. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v. 58, p. 12159-12165, 2019. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0957582019300631?via%3Dihub. Acesso em: 16 jun. 2021. https://doi.org/10.1021/acs.iecr.9b01914.pt_BR
dc.identifier.doi10.1021/acs.iecr.9b01914
dc.identifier.issn1520-5045
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/44903
dc.languageenpt_BR
dc.publisherACS Publicationspt_BR
dc.subjectThermal Degradationpt_BR
dc.subjectMonoethylene Glycolpt_BR
dc.subjectEvaluationpt_BR
dc.subjectThermogravimetricpt_BR
dc.titleThermal degradation of monoethylene glycol in aqueous saline solution: evaluation by thermogravimetric and physicochemical analysespt_BR
dc.typearticlept_BR

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