The dryer used in the experimental process was operated with air flow in the vertical, air flow average fixed 3m/s and temperatures of 50, 60 and 70 deg C. The equation of the mathematical model was solved numerically and the method of least squares was identified convective coefficient of Mass Transfer. The aim of this study was to use the mathematical model represented by Newton's Law of Cooling to simulate the mass transfer on the surface of the avocado pulp during the drying process. The main obstacle for obtaining the petroleum is the high humidity found in the pulp, being necessary to the drying process, which involves the transfer of heat and mass. Among the various plant species is the avocado ( Persia americana Mill.) showing great potential in the production of petroleum extracted from the pulp and the alcohol removed from the seed. One such source is biodiesel energy, organic matter originated from animal and/or vegetable. With the petroleum crisis in the 70 were sought new energy sources, among them renewable.

Most of all energy consumed worldwide comes from fossil fuels derived from petroleum. Experimental study of convective coefficient of mass transfer of avocado ( Persia americana Mill.)Д®nergy Technology Data Exchange (ETDEWEB)ДЄlves, Suerda Bezerra Luiz, Marcia Ramos Amorim, Joselma Araujo de Gusmao, Rennam Pereira de Gurgel, Jose Mauricio [Universidade Federal da Paraiba (LES/UFPB), Joao Pessoa, PB (Brazil).

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