Transesterificação do óleo vegetal usando resina de troca catiónica modificada

Abstract

The development of technology related to the modification of polymeric surfaces has received special attention due to its relevance in obtaining obtaining a variety of materials with adhesive properties that can be used in various used in various applications. With this in mind, this work was carried out with the aim of preparing surface-modified polypropylene using H2SO4 as a sulphonating agent, for use as a catalyst in the production of biodiesel. The cation exchange capacity was measured and the influence of the following variables was investigated temperature, volume and reaction time, with the aim of identifying the optimum operating conditions. conditions. The results showed that this parameter was strongly influenced by the reaction temperature, 3,158 mmol/g was obtained for PPS7 prepared at 120ºC, 1 hour and 100 ml of concentrated sulphuric acid was obtained, which is 50 times more than PPS1 prepared at 70ºC, 1 hour and 50ml of concentrated sulphuric acid. O which allowed PPS7 to be used as a catalyst for converting oil into ethyl esters esters in up to 40.02% yield in 4 hours at a molar ratio of 1:12 and 2% m/m of PPS7. of PPS7, thus revealing potential for the transesterification and esterification of vegetable oils. The kinetics of the reaction were investigated by comparing NaOH and H2SO4 with PPS7, homogeneous catalysis proved to be more efficient with a rate constant of 0.776/h (NaOH) and 0.175/h (H2SO4), faster than catalysis using PPS7. compared to catalysis using PPS7 with a speed constant of 0.068/h. ( TRADUÇAO NOSSA)