Open Access(Vapor + Liquid) Equilibrium for Mixtures Ethanol + Biodiesel from Soybean Oil and Frying Oil
Author(s) -
Pollyana M. S. Kalvelage,
Allan Almeida Albuquerque,
Antônio André Chivanga Barros,
Sávio Leandro Bertoli
Publication year - 2017
Publication title -
international journal of thermodynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 32
ISSN - 1301-9724
DOI - 10.5541/eoguijt.337160
Subject(s) - non random two liquid model , unifac , biodiesel , chemistry , soybean oil , thermodynamics , isobaric process , biodiesel production , ethanol , sunflower oil , pulp and paper industry , waste management , activity coefficient , organic chemistry , engineering , aqueous solution , food science , catalysis , physics
In order to provide new isobaric vapor−liquid equilibrium (VLE) data for ethanol-biodiesel systems, experimental boiling points for mixtures of ethanol + biodiesel from soybean oil (SB) and frying oil (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 (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.
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