Publicação
Separation parameters using ionic liquid mixtures: analysis by inverse gas chromatography measurements
| Resumo: | This work discusses the potential of imidazolium-based ionic liquids as potential in the fractionation of terpene mixtures, also giving information relevant to study other separation processes such as the desulfurization and denitrification of fuel oils. Besides pure [C12mim]Cl, the equimolar mixture [C4mim][C12mim]Cl of ionic liquids was also tested. The separation capacity between solutes and ionic liquids can be calculated from infinite dilution activity coefficients, measured experimentally for 40 solutes; water, common organic solvents and terpenes in both ionic liquids using inverse gas chromatography, in the temperature range of 333.15 to 423.15 K. The values for the activity coefficients at infinite dilution are very small for terpenes and terpenoids, indicating a strong interaction, possibly due to the high basicity of the anion and the high apolarity of the cation. Selectivities were obtained for hypothetical binary mixtures containing α-pinene oxide but showing, in general, low capacities. However, preliminary results showed that the combination of two ionic liquids could present better selectivity values than pure ionic liquids, which is an open area to be explored. |
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| Autores principais: | Tentor, Fabio Ribeiro |
| Assunto: | Ionic liquids Terpenes Terpenoids Separation Activity coefficients at infinite dilution |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| Resumo: | This work discusses the potential of imidazolium-based ionic liquids as potential in the fractionation of terpene mixtures, also giving information relevant to study other separation processes such as the desulfurization and denitrification of fuel oils. Besides pure [C12mim]Cl, the equimolar mixture [C4mim][C12mim]Cl of ionic liquids was also tested. The separation capacity between solutes and ionic liquids can be calculated from infinite dilution activity coefficients, measured experimentally for 40 solutes; water, common organic solvents and terpenes in both ionic liquids using inverse gas chromatography, in the temperature range of 333.15 to 423.15 K. The values for the activity coefficients at infinite dilution are very small for terpenes and terpenoids, indicating a strong interaction, possibly due to the high basicity of the anion and the high apolarity of the cation. Selectivities were obtained for hypothetical binary mixtures containing α-pinene oxide but showing, in general, low capacities. However, preliminary results showed that the combination of two ionic liquids could present better selectivity values than pure ionic liquids, which is an open area to be explored. |
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