Thermo-catalytic studies on a mixture of plastic waste and biomass

Author:

Sebestyén ZoltánORCID,Blazsó MarianneORCID,Jakab EmmaORCID,Miskolczi NorbertORCID,Bozi JánosORCID,Czégény ZsuzsannaORCID

Abstract

AbstractThe effects of various catalysts on the composition of volatile pyrolysis products of a plastic waste and biomass mixture (1:1) were studied, by pyrolyzing the mixture sample using slow and fast heating rate. Various zeolite catalysts (β-and Y-zeolites, ZSM-5 and FCC) and nickel-molybdenum catalyst on alumina support were applied to find suitable catalysts for upgrading the quality of the thermal decomposition products of the waste mixture. A sample to catalyst ratio of 2:1 was used in the experiments. The rate of evolution of the decomposition products under slow pyrolysis was measured by thermogravimetry/mass spectrometry (TG/MS). The composition of the pyrolyzates was analyzed in detail by pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS) method. The influence of all applied catalysts was more pronounced on the plastic content of the sample than on biomass. The pyrolysis experiments revealed that the catalysts promoted the cracking reactions of the evolved hydrocarbons; furthermore, the formation of aromatic products was enhanced remarkably in the presence of all zeolite catalysts. Beta-zeolite and ZSM-5 catalysts were found the most effective in cracking hydrocarbons to gaseous products and in aromatization, while the highest CO2 formation was obtained by FCC from the biomass part of the studied waste mixture. NiMo catalyst promoted the H2 production from the plastic part; furthermore, slight aromatization and cracking effects were also observed.

Funder

Nemzeti Kutatási, Fejlesztési és Innovaciós Alap

Hungarian Scientific Research Fund

Nemzeti Fejlesztési Minisztérium

ELKH Research Centre for Natural Sciences

Publisher

Springer Science and Business Media LLC

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