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https://hdl.handle.net/1822/8216
Título: | High pressure solubility data of carbon dioxide in (tri-iso-butyl(methyl)phosphonium tosylate + water) systems |
Autor(es): | Ventura, Sónia P. M. Pauly, Jérôme Daridon, Jean L. Silva, J. A. Lopes da Marrucho, Isabel M. Dias, A. M. A. Coutinho, J. A. P. |
Palavras-chave: | Gas solubility High pressure Ternary system Carbon dioxide Phosphonium Water |
Data: | Ago-2008 |
Editora: | Elsevier Ltd. |
Revista: | The Journal of Chemical Thermodynamics |
Citação: | "The Journal of Chemical Thermodynamics". ISSN 0021-9614. 40:8 (Aug, 2008) 1187-1192. |
Resumo(s): | Ionic liquids are attracting great attention nowadays due to their interesting properties which make them useful in a broad range of applications including reaction media or separation/capture of environmentally hazardous gases such as carbon dioxide. In many cases, for practical and/or economical reasons, the use of aqueous solutions of ILs would be preferable to their use as pure compounds. In this work, high pressure equilibrium data for the {carbon dioxide (CO2) + tri-iso-butyl(methyl)phosphonium tosylate [iBu3MeP][TOS] + water system were measured at temperatures ranging from (276 to 370) K and pressures up to 100 MPa. Measurements were performed using a high-pressure cell with a sapphire window that allows direct observation of the liquid–vapour transition. Mixtures with different IL concentrations were studied in order to check the influence of the amount of IL on the solubility of CO2 in the aqueous mixture. The results show that the presence of IL enhances the solubility of CO2 in the (IL + water) system revealing a salting-in effect of the IL on the solubility of CO2. The appearance of a three phase region was observed for IL concentrations higher than 4 mol% of IL in water when working at pressures between 4 and 8 MPa and temperatures between (280 and 305) K. In this range, the upper limit of the VLE region observed is shown to increase with the temperature being almost independent of the IL initial concentration in the mixture. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/8216 |
DOI: | 10.1016/j.jct.2008.04.012 |
ISSN: | 0021-9614 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Ventura_JCThermo[1].pdf | 204,81 kB | Adobe PDF | Ver/Abrir |