Uso de un catalizador FCC regenerado en reciclaje químico de polietilentereftalato (PET) mediante glucolisis

Abstract

The objective of this study consisted of analyzing the use of a regenerated catalyst in the depolymerization process (chemical degradation) through glycolysis of polyethylene terephthalate (PET). A methodological design was used in which poisoned catalysts were recovered after their use in the Fcc unit to regenerate them and thus apply them in catalytic glycolysis of post-consumer PET. In the reaction with ethylene glycol, the amount and type of catalyst were varied in order to compare the yields obtained from each of the catalysts, A 2-level factorial design with a central point was used to verify the influence of the type and amount of catalyst as input parameters and their effects on the BHET yield, this being the response variable. Therefore, the different yields obtained were obtained as results, taking into account that zinc acetate had the highest yield. Finally it could be concluded that the amount of catalyst regenerated in the PET depolymerization process is somewhat irrelevant since it was worked with 2 ratios 100 to 2 and 100 to 1, the two variations had extremely similar data that are imperceptible graphically; that is why the comparison by means of numerical data gives a difference of 0.33 being the ratio 100-1 the superior one in yields, in addition according to the ANOVA analysis the hypothesis that the variation of the amount of catalyst influences the yield of the reaction was discarded.