The aim of this study is to enhance the yield of H2 during pyrolysis of waste lubricant oils using Na-Y zeolite as catalyst. The pyrolysis at high temperature (lower than 700°C) of recycled lubricant oils was successfully carried out under a nitrogen atmosphere. Different techniques were used for zeolite characterization: transmission electron microscopy (TEM), Raman and FT-IR spectroscopy, X-ray diffraction and N2 adsorption-desorption analyses. The results of the catalytic tests show that the average concentration of H2 produced during pyrolysis increases with respect to untreated (without zeolite), i.e. our zeolite Na-Y catalyst favors H2 formation. Moreover, the total yield of all gas species is increased in presence of the Na-Y zeolite catalyst.
