INVESTIGADORES
PIERELLA Liliana Beatriz
congresos y reuniones científicas
Título:
Polystyrene transformation by thermal and catalytic pyrolysis
Autor/es:
L. PIERELLA, M. RENZINI, D.CAYUELA.
Lugar:
Taiwan
Reunión:
Conferencia; Southeast Asia Environmental Forensics Conference; 2005
Resumen:
Abstract
Catalytic
transformation of waste polymers into hydrocarbons with higher commercial value
shows a great interest. Polystyrene (PS) was transformed mainly to liquid hydrocarbons
(LHC = >94.96 wt %), by thermal degradation and catalytic cracking over MEL
modified zeolites, H-ZSM-11 and Zn-ZSM-11. The conversion levels were nearly complete between 400-500oC. The
main LHC products of PS catalytic degradation were benzene and styrene, and in
minor proportion indanes and α-methylstyrene, being these compounds very
important in the polymers technology and petrochemical field. Styrene was the
most important product in the thermal cracking. A single-pass reactor and
atmospheric pressure was employed. The crystallinity, the nature of the
structure and the stability of the synthesized and modified catalysts after
cation incorporation were confirmed by XRD, FTIR and surface area by BET. The nature of acidic sites was determined by
FTIR of pyridine adsorbed. The reactant (atactic PS) was characterized by
TG-DSC. Reaction products were analyzed by gas chromatography and mass
spectrometry. By means of the
development of a competitive catalytic system, we determine the feasibility of
the process of degradation of PS towards
the synthesis of LHC products.