Sequestration of light hydrocarbons in Ionic Liquids at high-pressures: Consistency and thermodynamic modeling

Autor(es)

Arce, Pedro F. ^[1] ; Igarashi, Edson M. ^[1] ; Freire, V, Nian ; Vasquez, Dreidy M. ^[2] ; Robles, Pedro A. ^[2]

Afiliação do(s) autor(es)

^[1] V, Univ Sao Paulo, Engn Sch Lorena, Chem Engn Dept, BR-12602810 Sao Paulo - Brazil

^[2] Pontificia Univ Catolica Valparaiso, Escuela Ingn Quim, Valparaiso 2340000 - Chile

• Tipo de documento: Artigo Científico
• Fonte: Fluid Phase Equilibria; v. 546, OCT 15 2021.
• Citações Web of Science: 0

Resumo

Ionic liquids are applicable in the recovery of valuable products, remotion of polluting agents, and used in many CO2-capture techniques. In this work, high-pressure vapor-liquid equilibria of twenty-one binary mixtures of light hydrocarbons + IL has been modelled with Peng-Robinson/Stryjek-Vera equation of state applying Wong-Sandler mixing rules and van Laar model for the gamma-phi approach and Perturbed Chain-Statistical Associating Fluid Theory equation of state for the phi-phi approach. Critical properties were determined using a group contribution method. Adjustable characteristic pure component parameters were obtained using predicted vapor pressures and saturated liquids densities values. Experimental data, obtained from literature, were subjected to thermodynamic consistency area test. For the thermodynamic modelling, adjustable parameters were fitted between predicted and experimental bubble pressure. Van Laar and interaction parameters were regarded as temperature-dependent. Results obtained for both models, in terms of the main deviations between experimental and calculated pressures, were reasonably satisfactory. (C) 2021 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 15/05155-8 - Modelagem de propriedades termofísicas de fluidos puros (líquidos iônicos e compostos presentes em produtos naturais) e comportamento termodinâmico do equilíbrio de fases de misturas
• Beneficiário: Pedro Felipe Arce Castillo
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/03739-0 - Medição experimental, correlação e predição do comportamento de fases de fluidos de sistemas contendo líquidos iônicos (imidazôlio) e co2 supercrítico.
• Beneficiário: Pedro Felipe Arce Castillo
• Modalidade de apoio: Auxílio à Pesquisa - Regular