abstract
The cloud point is an important property of biodiesel, controlling its low temperature behaviour, especially the fluidity of the fuel. Although biodiesel is an interesting renewable energy source, data for the melting/cloud point of biodiesel or simple binary or ternary mixtures of fatty acid ethyl esters (FAEE) are still scarce in the literature, particularly for those involving ethyl esters. The phase diagrams of six binary mixtures of ethyl palmitate with saturated and unsaturated fatty acid ethyl esters were determined by Differential Scanning Calorimetry (DSC). The determined systems were successfully described employing the UNIQUAC model. The experimental data indicates that the cloud point is controlled by the fatty acid ethyl ester in the mixture with higher melting temperature. (C) 2011 Elsevier Ltd. All rights reserved.
keywords
LOCAL COMPOSITION MODELS; SOLID-LIQUID EQUILIBRIUM; WAX FORMATION; HIGH-PRESSURE; FUEL BLENDS; PREDICTIVE UNIQUAC; FLOW PROPERTIES; CARBON-DIOXIDE; DIESEL FUELS; CLOUD POINT
subject category
Energy & Fuels; Engineering
authors
Costa, MC; Boros, LAD; Batista, MLS; Coutinho, JAP; Krahenbuhl, MA; Meirelles, AJA
our authors
Marta Luísa Salsas Batista
PhD Studentacknowledgements
The authors are grateful to CNPq (304495/2010-7 and 480992/2009-6), FAPESP (08/09502-0 and 08/56258-8), and FAEPEX/UNICAMP for their financial support.