In this study, we used a mixture of organic liquid propane-1,3-diol and ionic liquid 1-ethyl-3-methylimidazolium chloride([emim]Cl) as the entrainer to separate tert-butyl alcohol(TBA) + water. We measured the isobari...In this study, we used a mixture of organic liquid propane-1,3-diol and ionic liquid 1-ethyl-3-methylimidazolium chloride([emim]Cl) as the entrainer to separate tert-butyl alcohol(TBA) + water. We measured the isobaric vapor–liquid equilibrium(VLE) for the quaternary system TBA + water + propane-1,3-diol + [emim]Cl at 101.3 kPa, and found the VLE data to be well correlated with the nonrandom two-liquid model. These results show that the mixed solvent of propane-1,3-diol + [emim]Cl can increase the relative volatility of TBA to water and break the azeotropic point. We found no notable synergetic effect between them, and observed that the liquid mixed solvent of propane-1,3-diol and [emim]Cl had lower viscosity than [emim]Cl, which makes it a promising entrainer for separating the TBA + water azeotrope in industrial applications.展开更多
The energy consumption in a batch rectifier and a batch stripper was investigated with a shortcut mathematical model.The minimum energy consumption of a batch stripper was compared to that of a batch rectifier under“...The energy consumption in a batch rectifier and a batch stripper was investigated with a shortcut mathematical model.The minimum energy consumption of a batch stripper was compared to that of a batch rectifier under“general constant reflux”and“general constant distillate composition”with the ratio of minimum energy consumption E_(S)/E_(R).When the feed contains a large amount of light component,the product purity specification is low and the relative volatility is small,the minimum energy consumption of a batch stripper is less than that of a batch rectifier under“general constant reflux”and“general constant distillate composition”.When the feed contains a small amount of light component,the product purity specification is very high and the relative volatility is low,a batch stripper can also consume less energy only in the“general constant distillate composition”operation mode.In other cases,a batch rectifier can consume less energy.展开更多
基金supported by the Innovation Fund of Tianjin University (No. 2010XJ-0022)
文摘In this study, we used a mixture of organic liquid propane-1,3-diol and ionic liquid 1-ethyl-3-methylimidazolium chloride([emim]Cl) as the entrainer to separate tert-butyl alcohol(TBA) + water. We measured the isobaric vapor–liquid equilibrium(VLE) for the quaternary system TBA + water + propane-1,3-diol + [emim]Cl at 101.3 kPa, and found the VLE data to be well correlated with the nonrandom two-liquid model. These results show that the mixed solvent of propane-1,3-diol + [emim]Cl can increase the relative volatility of TBA to water and break the azeotropic point. We found no notable synergetic effect between them, and observed that the liquid mixed solvent of propane-1,3-diol and [emim]Cl had lower viscosity than [emim]Cl, which makes it a promising entrainer for separating the TBA + water azeotrope in industrial applications.
文摘The energy consumption in a batch rectifier and a batch stripper was investigated with a shortcut mathematical model.The minimum energy consumption of a batch stripper was compared to that of a batch rectifier under“general constant reflux”and“general constant distillate composition”with the ratio of minimum energy consumption E_(S)/E_(R).When the feed contains a large amount of light component,the product purity specification is low and the relative volatility is small,the minimum energy consumption of a batch stripper is less than that of a batch rectifier under“general constant reflux”and“general constant distillate composition”.When the feed contains a small amount of light component,the product purity specification is very high and the relative volatility is low,a batch stripper can also consume less energy only in the“general constant distillate composition”operation mode.In other cases,a batch rectifier can consume less energy.
