Phase equilibrium data and modeling of ethylic biodiesel, with application to a non-edible vegetable oil

FUEL

卷:203

Article

Muhammad, Fahad^1,2  Oliveira, Mariana B.³  Pignat, Patrice⁴  Jaubert, Jean-Noel²  Pinho, Simao P.¹  Coniglio, Lucie² 

[1] Inst Politecn Braganca, Associate Lab LSRE LCM, Campus Santa Apolonia, P-5300253 Braganca, Portugal

[2] Univ Lorraine, ENSIC, Lab React & Genie Proc, UMR CNRS 7274, 1 Rue Grandville, F-54000 Nancy, France

[3] Univ Aveiro, Chem Dept, Aveiro Inst Mat, CICECO, P-3810193 Aveiro, Portugal

[4] PIGNAT SAS, 6 Rue Calmette, F-69740 Genas, France

关键词: Vapor-liquid equilibrium;    Biodiesel;    Consistency;    CPA;    UNIFAC;    NEVO;   

DOI  :  10.1016/j.fuel.2017.05.007

来源: Elsevier

【 摘 要 】

Contributing to extending the knowledge for the design and operation of biodiesel production processes, isobaric PTxy vapor-liquid equilibria data of ethanol + ethyl hexanoate, 1-pentanol + ethyl hexanoate and 1-pentanol + ethyl octanoate at two different pressures are reported for the first time. Consistency tests were applied to attest the quality of the collected data, for these especially complex measurements. Besides that, vapor pressures of the pure ethyl esters have also been measured. For modeling purposes, the Lyngby and Dortmund UNIFAC variants were used to predict the VLE phase diagrams. Generally, the predictions are of very good quality, being the UNIFAC-Do ( Dortmund) better, as the deviations in temperature and vapor compositions are always lower to 1.0 K and 0.020, respectively. Checking for the viability for extrapolations in pressure, CPA EoS was also applied to the modeling of the experimental data with very good results. Finally, aiming at examining the model capabilities to describe multicomponent systems, VLE measurements involving two alcohols and the fatty acid ethyl ester mixture obtained from non-edible vegetable oil have been carried out showing the good performance of the predictive models. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

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