The influence of temperature on the rheology of biodiesel and on the biodiesel-glycerin-ethanol blend - doi: 10.4025/actascitechnol.v34i1.8067

Andrés José Cocato Steluti, Oswaldo Curty da Motta Lima, Nehemias Curvelo Pereira


After transesterification reaction, biodiesel and glycerin (the resulting co-product), coupled to reaction excesses and impurities, make up two distinct phases that must be separated. The use of ethanol as a transesterificating agent impairs the above-mentioned separation due to the greater affinity of ethyl esters (biodiesel from ethanol) to glycerin. Current research provides an analysis of the influence of temperature on the rheology of biodiesel and the bio-diesel-glycerin-ethanol blend. Rheology behavior is highly important not merely in issues involving, for instance, discharging and pumping, but also as a factor that should be evaluated within the process of separation of the biodiesel-glycerin phases by decantation and centrifugation.


Biofuel; phase separation; rheology

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ISSN 1806-2563 (impresso) e ISSN 1807-8664 (on-line) e-mail:


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