Kinetic behavior of solar processes should be studied in solar facilities in order to consider the real heating conditions that affect the process. In this work, the thermo-desorption of CuO was performed in a solar reactor operated in a solar furnace. Kinetic of this process was studied considering both isothermal and non-isothermal methods. By means of isothermal methods, it was found that the reaction follows the Avrami-Erofeev equation and the kinetic parameters varied according to the n coefficient of such an equation. Master-plots method was then applied from non-isothermal experiments. The employed methodology was easier and the experimentation time much shorter than in isothermal case. The Avrami-Erofeev mechanism was clearly confirmed with this method.