Análise do efeito do pré-tratamento com sílica nas características físico-químicas do óleo residual de fritura e seu potencial uso como matéria-prima na produção de biodiesel

Abstract

This study was conducted to evaluate the effect of the treatment of residual oil frying with natural silica, obtained from in agro-industrial waste in order to make it raw material for the biodiesel production. Initially,wereproduced rice silica and wheat silica with processes involving acidification (hydrochloric acid 3 mol/L), followed by washing, drying of the waste material for 12 hours at 105°C and calcination in a muffle at 1000°C for 12 hours. Thi s proccess was repeated twice for the obtainment of the sílica.The pre-treatment of the oil used for frying, consisted in the use of an electrolyte, decantation, drying in a desiccator and treatment with 0,5% of silica produced previously, and then was filtrated. The results indicate that the treatment proposed with rice silica and wheat silica are similar and positive in the frame of raw material for the biodiesel production.