2012
DOI: 10.1016/j.compchemeng.2012.01.006
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Control of an extractive distillation process to dehydrate ethanol using glycerol as entrainer

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Cited by 122 publications
(83 citation statements)
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“…All four cases use essentially the same structure with some modifications that account for different temperature profiles and sensitivities to disturbances. (2) The top pressure is controlled by manipulating the condenser duty; (3) The reflux drum level is controlled by manipulating the distillate flowrate; (4) The reflux ratio was kept constant while the disturbances were applied (Arifin and Chien, 2008;Luyben, 2008;Gil et al, 2012); (5) The ratio between the solvent feed flowrate and azeotropic mixture feed flowrate (S/F) is kept constant by using a multiplier together with a controller in cascade; (6) The temperature control is performed by manipulating the vapor flowrate of the reboiler; (7) A flow controller was added to the azeotropic feed stream in order to apply feed flowrate disturbances.…”
Section: Dynamic and Controlmentioning
confidence: 99%
“…All four cases use essentially the same structure with some modifications that account for different temperature profiles and sensitivities to disturbances. (2) The top pressure is controlled by manipulating the condenser duty; (3) The reflux drum level is controlled by manipulating the distillate flowrate; (4) The reflux ratio was kept constant while the disturbances were applied (Arifin and Chien, 2008;Luyben, 2008;Gil et al, 2012); (5) The ratio between the solvent feed flowrate and azeotropic mixture feed flowrate (S/F) is kept constant by using a multiplier together with a controller in cascade; (6) The temperature control is performed by manipulating the vapor flowrate of the reboiler; (7) A flow controller was added to the azeotropic feed stream in order to apply feed flowrate disturbances.…”
Section: Dynamic and Controlmentioning
confidence: 99%
“…The selection of an efficient and suitable entrainer is the key to ensuring an economic operation. Currently, there are five types of entrainers used in extractive distillation, that is, solid salts, [1][2][3][4] liquid solvents, [5][6][7][8] the mixture of liquid solvents and solid salts, [9][10][11][12] hyperbranched polymers, 13 and ionic liquids (ILs). [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] Due to their unique advantages, such as nonvolatility, salt effect, high separation ability, regeneration, being present in the liquid state around room temperature, and thermal and chemical stabilities, ILs have received considerable attention in recent years for their use in extractive distillation for the separation of olefins and alkanes, alcohols and aliphatics, alcohols and water, and many other systems.…”
Section: Introductionmentioning
confidence: 99%
“…Dentre as aplicações do álcool anidro, destaca-se sua utilização como combustível, sendo misturado à gasolina para operar com máquinas de ignição. O Brasil permite a mistura de etanol anidro na gasolina, além da vasta difusão dos automóveis bicombustíveis que podem funcionar com etanol (Gil et al, 2012). Um dos solventes mais usados para a desidratação de etanol é o etilenoglicol (Dias et al, 2009).…”
Section: Introductionunclassified