Aktivní uhlí připravené ko-pyrolýzou odpadní kukuřice a pneumatik za přítomnosti různých iontů kovů pro sorpci xylenu z odpadních plynů

Abstract

This thesis deals with the preparation of carbonaceous sorbents by microwave co-pyrolysis of waste corn cob biomass and scrap tyre crumb in a mass ratio of 4:1, without activation and with the addition of chemical activators (FeCl3, MnCl2·4H2O, Al(NO3)3·9H2O, SnCl4, TiCl4). The prepared materials were characterised by BET analysis, CHNS and XRF elemental analysis, FTIR and Raman spectroscopy. The xylene adsorption capacity was determined in a fixed-bed column at an inlet xylene concentration of 1000 ppm. The optimal pyrolysis conditions were identified as a microwave power of 200 W and a residence time of 30 min. The highest adsorption capacity was achieved by the non-activated sample B-200-30 ( 9,0 mgxylene·g-1) and the activated sample ACB-MnCl2 ( 6,4 mgxylene·g-1). The results indicate that xylene adsorption capacity correlates with textural parameters and is influenced by micropore size distribution, as well as surface chemistry, and the nature of the metal cations present in the carbonaceous matrix.