The binary (solid plus liquid) phase diagrams of (caprylic or capric acid) + (1-octanol or 1-decanol)

Autor(es)

Carareto, Natalia D. D. ^[1] ; Castagnaro, Thamires ^[1] ; Costa, Mariana C. ^[2] ; Meirelles, Antonio J. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Food Engn Fac, EXTRAE, Dept Food Engn, BR-13083862 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Sch Appl Sci, BR-13484350 Limeira, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CHEMICAL THERMODYNAMICS; v. 78, p. 99-108, NOV 2014.
• Citações Web of Science: 6

Resumo

In the present study the phase diagrams of four (fatty acid + fatty alcohol) binary mixtures composed of caprylic (C8O2) or capric acid (C10O2) + 1-octanol (C8OH) or 1-decanol (C10OH) were obtained by differential scanning calorimetry (DSC). Eutectic and peritectic reactions occurred in the systems. In standard DSC analyses of the (C8O2 + C10OH) and (C10O2 + C8OH) systems, an exothermic transition occurs in association with the melting of a metastable phase. A Stepscan DSC method was used in order to avoid the formation of this metastable phase during the heating of the mixtures. The approach suggested by Slaughter and Doherty (1995) {[}24] was used for modeling the solid phase, and the Margules 2-suffix, Margules 3-suffix and NRTL models were applied for calculating the activity coefficients of the liquid phase. The best modeling results were obtained using the Margules-3-suffix with an average deviation between experimental and calculated values ranging from T = (0.3 to 0.9) K. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 08/09502-0 - Estudo detalhado do equilíbrio sólido-líquido de misturas de álcoois graxos com ácidos graxos
• Beneficiário: Mariana Conceição da Costa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/05027-1 - Equilíbrio sólido-líquido de compostos graxos e ponto de fulgor de biodiesel
• Beneficiário: Mariana Conceição da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Jovens Pesquisadores
• Processo FAPESP: 08/56258-8 - Phase equilibrium and purification processes in the production of biofuels and biocompounds
• Beneficiário: Antonio José de Almeida Meirelles
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático