Talko ir bentonito efektyvumo įvertinimas metilo ir etilo riebalų rūgščių esterių (biodyzelino) iš atalių aliejaus sausojo valymo metu

Anotacija

The dry purification of biodiesel using natural adsorbents has emerged as a sustainable alternative to the traditional method of washing with water in biodiesel production. In this context, this study investigates the efficiency of talc and bentonite in the dry purification of biodiesel from babassu, a promising oilseed that is little used for biodiesel production. The biodiesel was produced by alkaline transesterification and purified with different concentrations of talc and bentonite. The adsorbents were characterised by X-ray diffraction, infrared spectroscopy and textural analysis. After purification, the physicochemical parameters of the biodiesel were analysed and compared with water-purified samples. Bentonite showed a higher surface area (76.685 m2/g) and pore volume (0.121 cc/g) compared to talc (8.610 m2/g and 0.029 cc/g). Both adsorbents efficiently reduced the acidity index, with bentonite being more effective, especially at a concentration of 3.0%. Moisture was significantly lower in samples treated with adsorbents, with bentonite standing out in ethyl biodiesel. The dielectric constant decreased with the use of adsorbents, indicating a greater removal of polar contaminants. Dry purification with talc and bentonite is efficient in improving the quality of babassu biodiesel, meeting the specifications of current legislation.