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Flow properties of biodiesel: correlation between TMDSC and dynamic viscosity
Authors:S S Damasceno  R Rosenhaim  A D Gondim  M L A Tavares  N Queiroz  I M G Santos  A G Souza  N A Santos
Institution:1. Departamento de Química, CCEN, Universidade Federal da Paraíba, Jo?o Pessoa, Paraíba, Brazil
2. Departamento de Engenharia Química, CT, Universidade Federal da Paraíba, Jo?o Pessoa, Paraíba, Brazil
3. Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal, RN, 59078-970, Brazil
4. Departamento de Tecnologia Sucroalcooleira, CTDR, Universidade Federal da Paraíba, Jo?o Pessoa, Paraíba, Brazil
Abstract:Sustainable and renewable energy has become more attractive due to its environmental benefits. Among these alternative sources, biodegradable and low emission biodiesels have been gaining attention as compared to diesel. However, their performance at low temperatures affects their commercial viability, because of engine performance problems, and when starting. Cold Filter Plugging Point, Pour Point, and Cloud Point are employed to predict the limits of operability for biodiesel. However, dynamic viscosity and TM-DSC methods are also useful to assess these properties and can be correlated. Viscosity curves were obtained, and TM-DSC revealed that the start temperature (transition liquid–solid) exhibits an increase in flow resistance for soybean, colza, sunflower, corn, and babassu oil biodiesels. The nucleation processes which occur during cooling are unique for each type of biodiesel due to the presence of different ester compositions and the values for viscosity and flow at low temperatures varied accordingly.
Keywords:
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