4.8 Article

Prediction of normalized biodiesel properties by simulation of multiple feedstock blends

Journal

BIORESOURCE TECHNOLOGY
Volume 101, Issue 12, Pages 4431-4439

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.01.111

Keywords

Biodiesel properties; HYSYS; Simulation; Transesterification; EN-14214

Funding

  1. Universidad de Zaragoza (Spain) [UZ2008-TEC-04]

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A continuous process for biodiesel production has been simulated using Aspen HYSYS V7.0 software. As fresh feed, feedstocks with a mild acid content have been used. The process flowsheet follows a traditional alkaline transesterification scheme constituted by esterification, transesterification and purification stages. Kinetic models taking into account the concentration of the different species have been employed in order to simulate the behavior of the CSTR reactors and the product distribution within the process. The comparison between experimental data found in literature and the predicted normalized properties, has been discussed. Additionally, a comparison between different thermodynamic packages has been performed. NRTL activity model has been selected as the most reliable of them. The combination of these models allows the prediction of 13 out of 25 parameters included in standard EN-14214:2003, and confers simulators a great value as predictive as well as optimization tool. (C) 2010 Elsevier Ltd. All rights reserved.

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