4 documents found, page 1 of 1
Zeólita 4A para purificação do gás de aterro sanitário
Souza Filho, José Demontier Vieira de; Lima, Ari Clecius Alves de; Stefanutti, Ronaldo; Silva, Wildson Max Barbosa da; Bastos Neto, MoisésThe anaerobic decomposition in landfills produces a gas mixture known as landfill biogas. This biogas consists mainly of CH4 and CO2. The CO2 removal can be carried out by means of adsorption. In order to promote CO2 removal, zeolite type 4A was used as solid adsorbent. The synthesized zeolite was characterized by scanning electron microscopy and X-ray diffraction. CH4/CO2 mixture isotherms were obtained in a m...
Zinc ferrite nanoparticles via coprecipitation modified method: glycerol as str...
Lima, Edilan Silva; Costa, Luelc Souza da; Sampaio, Gabrielle R. L. M.; Oliveira, Edipo S.; Silva, Erandir B.; Nascimento, Hélio O.Coprecipitation is one of the most practical methods used to synthesize ferrite nanoparticles. Fine characteristics of these materials can be improved by means of a series of modifications in the synthesis method. In this paper we present a study of influence of glycerol as structure directing and stabilizing agent in the synthesis of zinc ferrite nanoparticle, exploring its chelating capacity and oxidation. Th...
Materiais hierarquicamente estruturados com fase cúbica mesoporosa: síntese, ca...
Loiola, Adonay RodriguesHierarchical silica porous materials have been successfully synthesized using polystyrene nanospheres as macropore template, triblock copolymer Pluronic F127 as mesopore template, tetramethyl orthosilicate as silica source and ethanol as cosurfactant. The obtained materials were characterized by XRD, TG-DTA, N2 adsorption, Hg porosimetry, SEM, HRSEM, TEM and AFM. These materials consist of a system of macropore...
Diagênese acelerada de caulim à zeólita NaA para uso no abrandamento de Águas
Loiola, Adonay RodriguesZeolite NaA (LTA) has been successfully synthesized by hydrothermal route, in which kaolim was used as silicon and aluminum source. The obtained zeolite was characterized by X-ray diffraction, X-ray absorption, thermogravimetry (TG), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), infrared absorption spectroscopy (IR), luminescence and granulometry. The X-ray diffraction data refine...