Zeolitic Catalysts
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Síntesis y caracterización de fotocatalizadores de hierro soportado sobre zeolitas microporosas
ABSTRACT ZSM11 and BETA zeolitic materials were synthesized by the hydrothermal method and were further impregnated with a 6 wt% of iron and characterized by different physicochemical techniques in order to be employed in the photocatalytic degradation of methyl orange (MO). Matrices structures and crystallinity were verified by X Ray Diffraction (XRD) and F
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Zeólitas hierarquicamente estruturadas
This review presents the main characteristics and properties of microporous (zeolites) and ordered mesoporous materials, focusing on structural aspects and preparation. In addition, their use as heterogeneous catalysts are also discussed, with emphasis on their advantages and disadvantages. Due to difficulty in application of zeolites in the conversion of bu
Quím. Nova. Publicado em: 2013
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3. Synthesis and characterization of Fe(III)-piperazine-derived complexes encapsulated in zeolite Y
Zeolite-encapsulated complexes have been widely applied in hydrocarbon oxidation catalysis. The "ship-in-a-bottle" encapsulation of iron(III) complexes containing piperazine and piperazine-derivative ligands in zeolite-Y is described. The flexible ligand methodology was employed and the efficiency and reproducibility of the procedure was investigated. The ca
Química Nova. Publicado em: 2012
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4. CRAQUEAMENTO CATALÍTICO DE n-HEPTANO SOBRE ZEÓLITAS ZSM-12 COM DIFERENTES RAZÕES SiO2/Al2O3 VISANDO OBTER ADITIVOS DE BAIXO CUSTO PARA CATALISADORES DE FCC. / CATALYTIC CRACKING OF N-HEPTANE ON ZEOLITE ZSM-12 WITH DIFFERENT REASONS SIO2/AL2O3 AIMING TO GET LOW COST FOR ADDITIVES CATALYTIC FCC.
O Petróleo é de vital importância para a sociedade devido aos seus derivados com largo emprego nas atividades econômicas e principalmente sua utilização como fonte energética. A expansão econômica e social do país, nas últimas décadas, vem exigindo importante desenvolvimento da nossa infra-estrutura, notadamente no setor de energia. O petróleo q
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2009
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5. Oxidation-reduction catalysis with zeolitic metasilicates / Catalise de oxido-redução via metalossilicatos zeoliticos
About forty catalyst materials were prepared among MFI zeolitic chromiumsilicates type and silica grafted by zirconium oxides, and after serve as anchoring cromium species. These materials were named Cr-ZSM-5 and Cr-SSM and were characterized to drive at catalytic process to change carbon monoxide to carbon dioxide. The characterizations involved, Powder X-R
Publicado em: 2005
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6. Identification of Extra-Framework Species on Fe/ZSM-5 and Cu/ZSM-5 Catalysts Typical Microporous Molecular Sieves with Zeolitic Structure
Cu and Fe species formed during the preparation of Cu/ and Fe/ZSM-5 catalysts by ion exchange were studied. XRD, SEM, H2-TPR, DRS-UV-VIS, EPR, Mössbauer Spectroscopy (MÖSS) and chemical analysis (AAS) were used to sample characterization. Cu/ZSM-5 catalysts, irrespective of their Si/Al ratio and Cu content, showed a reduction peak at around 210°C, which w
Materials Research. Publicado em: 2002-09
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7. Aplicações da espectroscopia fotoacustica e ressonancia paramagnetica eletronica ao estudo de materiais cataliticos
Spectroscopic characterization of heterogeneous catalysts are investigated using both Electron Spin Resonance (ESR) and Photoacoustic (PAS) techniques. An ESR study of crystalline zeolitic chromosilicate and ironsilicate, as well its optical properties has been presented with the purpose of further characterization of the distribution of each Cr3+ and Fe3+ s
Publicado em: 1991