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BIOMASS VALORIZATION THROUGH CATALYTIC PYROLYSIS USING METAL-IMPREGNATED NATURAL ZEOLITES: FROM WASTE TO RESOURCES

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dc.creatorDIEGO FERNANDO VENEGAS VASCONEZ
dc.creatorSERGUEI ALEJANDRO MARTIN
dc.date2024
dc.date.accessioned2025-01-10T15:52:07Z
dc.date.available2025-01-10T15:52:07Z
dc.date.issued2024
dc.description.abstractCATALYTIC BIOMASS PYROLYSIS IS ONE OF THE MOST PROMISING ROUTES FOR OBTAINING BIO-SUSTAINABLE PRODUCTS THAT REPLACE PETROLEUM DERIVATIVES. THIS STUDY EVALUATES THE PRODUCTION OF AROMATIC COMPOUNDS (BENZENE, TOLUENE, AND XYLENE (BTX)) FROM THE CATALYTIC PYROLYSIS OF LIGNOCELLULOSIC BIOMASS (PINUS RADIATA (PR) AND EUCALYPTUS GLOBULUS (EG)). CHILEAN NATURAL ZEOLITE (NZ) WAS USED AS A CATALYST FOR PYROLYSIS REACTIONS, WHICH WAS MODIFIED BY DOUBLE ION EXCHANGE (H2NZ) AND TRANSITION METALS IMPREGNATION (CU5H2NZ AND NI5H2NZ). THE CATALYSTS WERE CHARACTERIZED BY NITROGEN ADSORPTION, X-RAY DIFFRACTION (XRD), AMMONIUM PROGRAMMED DESORPTION (TPD-NH3), AND SCANNING ELECTRON MICROSCOPY WITH ENERGY DISPERSIVE X-RAY SPECTROSCOPY (SEM-EDS). ANALYTICAL PYROLYSIS COUPLED WITH GAS CHROMATOGRAPHY/MASS SPECTROMETRY (PY-GC/MS) ALLOWED US TO STUDY THE INFLUENCE OF NATURAL AND MODIFIED ZEOLITE CATALYSTS ON BTX PRODUCTION. XRD ANALYSIS CONFIRMED THE PRESENCE OF METAL OXIDES (CUO AND NIO) IN THE ZEOLITE FRAMEWORK, AND SEM-EDS CONFIRMED SUCCESSFUL METAL IMPREGNATION (6.20% FOR CU5H2NZ AND 6.97% FOR NI5H2NZ). PY-GC/MS REVEALED A REDUCTION IN OXYGENATED COMPOUNDS SUCH AS ESTERS, KETONES, AND PHENOLS, ALONG WITH AN INCREASE IN AROMATIC COMPOUNDS IN PR FROM 2.92% W/W (WITHOUT CATALYST) TO 20.89% W/W WITH NI5H2NZ AT A BIOMASS/CATALYST RATIO OF 1/5, AND IN EG FROM 2.69% W/W (WITHOUT CATALYST) TO 30.53% W/W WITH NI5H2NZ AT A BIOMASS/CATALYST RATIO OF 1/2.5. THESE INCREASES CAN BE ATTRIBUTED TO ACIDIC SITES WITHIN THE CATALYST PORES OR ON THEIR SURFACE, FACILITATING DEOXYGENATION REACTIONS SUCH AS DEHYDRATION, DECARBOXYLATION, DECARBONYLATION, ALDOL CONDENSATION, AND AROMATIZATION. OVERALL, THIS STUDY DEMONSTRATED THAT THE CATALYTIC BIOMASS PYROLYSIS PROCESS USING CHILEAN NATURAL ZEOLITE MODIFIED WITH DOUBLE ION EXCHANGE AND IMPREGNATED WITH TRANSITION METALS (CU AND NI) COULD BE HIGHLY ADVANTAGEOUS FOR ACHIEVING SIGNIFICANT CONVERSION OF OXYGENATED COMPOUNDS INTO HYDROCARBONS ...
dc.formatapplication/pdf
dc.identifier.doi10.3390/polym16131912
dc.identifier.issn2073-4360
dc.identifier.issn2073-4360
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/14027
dc.languagespa
dc.publisherPolymers
dc.relation.uri10.3390/polym16131912
dc.rightsPUBLICADA
dc.subjectspodumene
dc.subjectmolecular dynamics
dc.subjectMaterials Studio
dc.subjectlithium extraction
dc.subjectGromacs
dc.subjectflotation
dc.subjectcollector
dc.titleBIOMASS VALORIZATION THROUGH CATALYTIC PYROLYSIS USING METAL-IMPREGNATED NATURAL ZEOLITES: FROM WASTE TO RESOURCES
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA EN MADERAS
ubb.SedeCONCEPCIÓN
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