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The use of soybean oil for the production of biodiesel has been widely investigated, providing a renewable and biodegradable source to produce biofuels. In this context, exergy analysis is very useful to minimize losses and offer improvements for the efficiency of processes, describing the destroyed exergy and the responsible components for the losses of the system. The present study investigates the exergy efficiency of the soybean oil pretreatment process of a biofuel process production with an installed capacity of 152 million liters/year of biodiesel. Analyzes of chemical and physical exergies of the oil refining process flows for biodiesel production were carried out. The operating parameters were used to estimate the exergy efficiency of the process. Results showed that the exergetic efficiency of the soybean oil pretreatment process was 88% and the exergy destroyed was approximately 11%. The efficiency of the chemical reactions of the process was considered satisfactory.

Exergetic analysis of the process of pre-treatment of soybean oil for the production of biodiesel