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This work aims the synthesis and study of ZSM-5 catalysts for the conversion of ethanol to light olefins, especially, using an alternative and inexpensive route. The ethanol emerges as a renewable source for the production of olefins. The ZSM-5 catalyst has important characteristics for this type of reaction such as acidity, surface area and particle size. The synthesis was carried out in hydrothermal treatment at 170 °C. Were performed two synthesis with templates, using n-butylamine and tetrapropylammonium hydroxide (TPAOH), and an alternative and novel way using a nucleating gel. The catalyst characterization was performed using several techniques (XRD, BET, SEM and TGA). The catalytic reaction studied the influence of temperature (250 to 450 °C) and SAR (Si/Al 2 ratio). The products analysis was made with a gas chromatograph. The ethylene yield was above to 80 % for all catalysts. Lower SAR values obtain higher yields for propylene, around to 8 %. The temperature, SAR and template influenced in the selectivity. The nucleating gel method showed to be a viable and inexpensive alternative for ZSM-5 synthesis.