Publicación:
CATALYTIC OZONATION OF TOLUENE USING CHILEAN NATURAL ZEOLITE: THE KEY ROLE OF BRONSTED AND LEWIS ACID SITES

Vista sencilla de ítem
dc.creatorSERGUEI ALEJANDRO MARTIN
dc.date2018
dc.date.accessioned2025-01-10T15:01:30Z
dc.date.available2025-01-10T15:01:30Z
dc.date.issued2018
dc.description.abstractTHE INFLUENCE OF SURFACE PHYSICAL-CHEMICAL CHARACTERISTICS OF CHILEAN NATURAL ZEOLITE ON THE CATALYTIC OZONATION OF TOLUENE IS PRESENTED IN THIS ARTICLE. SURFACE CHARACTERISTICS OF NATURAL ZEOLITE WERE MODIFIED BY ACID TREATMENT WITH HYDROCHLORIC ACID AND ION-EXCHANGE WITH AMMONIUM SULPHATE. PRIOR TO CATALYTIC OZONATION ASSAYS, NATURAL AND CHEMICALLY MODIFIED ZEOLITE SAMPLES WERE THERMALLY TREATED AT 623 AND 823 K IN ORDER TO ENHANCE BRØNSTED AND LEWIS ACID SITES FORMATION, RESPECTIVELY. NATURAL AND MODIFIED ZEOLITE SAMPLES WERE CHARACTERISED BY N2 ADSORPTION AT 77 K, ELEMENTAL ANALYSIS, X-RAY FLUORESCENCE, AND FOURIER TRANSFORM INFRARED (FTIR) SPECTROSCOPY, USING PYRIDINE AS A PROBE MOLECULE. THE HIGHEST VALUES OF THE REACTION RATE OF TOLUENE OXIDATION WERE OBSERVED WHEN NH4Z1 AND 2NH4Z1 ZEOLITE SAMPLES WERE USED. THOSE SAMPLES REGISTERED THE HIGHEST DENSITY VALUES OF LEWIS ACID SITES COMPARED TO OTHER SAMPLES USED HERE. RESULTS INDICATE THAT THE PRESENCE OF STRONG LEWIS ACID SITES AT THE 2NH4Z1 ZEOLITE SURFACE CAUSES AN INCREASE IN THE REACTION RATE OF TOLUENE OXIDATION, CONFIRMING THE ROLE OF LEWIS ACID SITES DURING THE CATALYTIC OZONATION OF TOLUENE AT ROOM TEMPERATURE. LEWIS ACID SITES DECOMPOSE GASEOUS OZONE INTO ATOMIC OXYGEN, WHICH REACTS WITH THE ADSORBED TOLUENE AT BRØNSTED ACID SITES. ON THE OTHER HAND, NO SIGNIFICANT CONTRIBUTION OF BRØNSTED ACID SITES ON THE REACTION RATE WAS REGISTERED WHEN NH4Z1 AND 2NH4Z1 ZEOLITE SAMPLES WERE USED.
dc.formatapplication/pdf
dc.identifier.doi10.3390/catal8050211
dc.identifier.issn2073-4344
dc.identifier.issn2073-4344
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/10056
dc.languagespa
dc.publisherCatalysts
dc.relation.uri10.3390/catal8050211
dc.rightsPUBLICADA
dc.titleCATALYTIC OZONATION OF TOLUENE USING CHILEAN NATURAL ZEOLITE: THE KEY ROLE OF BRONSTED AND LEWIS ACID SITES
dc.title.alternativeOZONIZACIÓN CATALÍTICA DE TOLUENO UTILIZANDO ZEOLITA NATURAL CHILENA: EL PAPEL CLAVE DE LOS SITIOS ÁCIDOS DE BRØNSTED Y LEWIS
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA EN MADERAS
ubb.SedeCONCEPCIÓN
Archivos
Colecciones
Artículos científicos