(Vapor + Liquid) Equilibrium for Mixtures Ethanol + Biodiesel from Soybean Oil and Frying Oil

Authors : Pollyana M S KALVELAGE, Allan A ALBUQUERQUE, António A C BARROS, Sávio L BERTOLİ

Pages : 159-164

Doi:10.5541/eoguijt.337160

View : 10 | Download : 10

Publication Date : 2017-09-01

Article Type : Research Paper

Abstract :In order to provide new isobaric vapor−liquid equilibrium insert ignore into journalissuearticles values(VLE); data for ethanol-biodiesel systems, experimental boiling points for mixtures of ethanol + biodiesel from soybean oil insert ignore into journalissuearticles values(SB); and frying oil insert ignore into journalissuearticles values(FB); were measured. UNIFAC and NRTL models were used to predict and correlate the data, in order to better represent the VLE in process simulation. VLE data were measured with a Fischer type ebulliometer. Reliability and reproducibility were evaluated with VLE data for ethanol + water system at 101.32 kPa. These data also proved to be thermodynamically consistent based on the area test. The boiling temperatures for ethanol + biodiesel systems agreed with other results reported at same pressure for SB and for biodiesel from sunflower seed oil insert ignore into journalissuearticles values(SSB);. The thermodynamic modelling using the NRTL model obtained lower AAD values than those from UNIFAC, assuring better safety in the design and simulations steps of a biodiesel production plant.
Keywords : Biodiesel, Ethanol, NRTL, UNIFAC, Vapor liquid equilibrium