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Effect of different synthesis methods on the textural properties of calcium tun...
Alencar, Lorena Dariane da Silva; Lima, Naiara Arantes; Mesquita, Alexandre; Probst, Luiz Fernando Dias; Batalha, Daniel CarreiraCalcium tungstate (CaWO4) crystals were prepared by microwave-assisted hydrothermal (MAH) and polymeric precursor methods (PPM). These crystals were structurally characterized by X-ray diffraction (XRD), N2 adsorption, X-ray absorption near edge spectroscopy (XANES) and extended X-ray absorption fine structure (EXAFS) measurements. The morphology and size of these crystals were observed by field emission scanni...
Effect of different synthesis methods on the textural properties of calcium tun...
Da Silva Alencara, Lorena Dariane; Lima, Naiara Arantes; Mesquita, Alexandre [UNESP]; Probst, Luiz Fernando Dias; Batalha, Daniel CarreiraMade available in DSpace on 2018-12-11T17:20:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01. Added 1 bitstream(s) on 2019-10-09T18:31:44Z : No. of bitstreams: 1 S1516-14392018000300037.pdf: 1978270 bytes, checksum: 13347cc24e2927c54c2c95e72ffb1d71 (MD5); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Fun...
Use of iron and bio-oil wastes to produce highly dispersed Fe/C composites for ...
Mendonça, Fernanda Gomes de; Rosmaninho, Marcelo Gonçalves; Fonseca, Philipe Xavier da; Soares, Ricardo Reis; Ardisson, José DomingosThis work describes the synthesis, characterization, and application of an active heterogeneous photo-Fenton system obtained from two different wastes, i.e., laterite (an iron mining waste) and the acid aqueous fraction (AAF) from bio-oil production. AAF with high acidity (ca. 3 molH+ L−1) and organic concentration (25 wt.%) obtained from biomass flash pyrolysis was used for the efficient extraction of Fe3+ fro...
Preparation, characterization and catalytic application of Barium molybdate (Ba...
Alencar, Lorena Dariane da Silva; Mesquita, Alexandre; Feitosa, Carlos Alberto Carneiro; Balzer, Rosana; Probst, Luiz Fernando DiasBarium molybdate and Barium tungstate are important materials due their photoluminescent properties and they also have catalysis and photocatalysis applications. In this work, powders of these compounds were prepared by microwave-assisted hydrothermal (MAH) method and polymeric precursor method (PPM) and their structural and optical properties were studied. Furthermore, these materials were employed as solid ca...
Alcoxycle : a novel route for glycerol reform into H2 and COx inseparate stages.
Paula, Fabiano Gomes Ferreira de; Rosmaninho, Marcelo Gonçalves; Teixeira, Ana Paula de Carvalho; Souza, Patterson Patrício de; Lago, Rochel MonteroIn this paper, it is proposed a new route, named “Alkoxycle”, for the conversion of glycerol from biodieselproduction into H2and CO/CO2in different and separate stages. In this process, glycerol first reacts withNaOH to form an alkoxide that, in a second step, undergoes controlled thermal decomposition. Analysesof glycerol:NaOH precursor mixtures (molar ratios of 1:1, 1:2, 1:3 and 1:5) by TG, XRD, SEM, TEM, Ram...
Conversion of fatty acids into hydrocarbon fuels based on a sodiumcarboxylate i...
Perígolo, Deise Morone; Paula, Fabiano Gomes Ferreira de; Rosmaninho, Marcelo Gonçalves; Souza, Patterson Patrício de; Lago, Rochel MonteroIn this work, it was investigated the conversion of fatty acids into hydrocarbon based on the reaction withNaOH followed by a controlled thermal decomposition. FTIR, Raman, UV–vis, XRD, TG-MS, SEM/TEM, CHN,GC–MS showed that precursors based on NaOH/oleic acid (molar ratios 0.7, 1.0, 1.5 and 2.0) decomposedat 550◦C to produce three fractions, i.e. liquid (5–37 wt%), gas (52–70 wt%) and solid (10–31 wt%). Theliqu...
Catalytic carbon deposition-oxidation over Ni, Fe and Co catalysts : a new indi...
Oliveira, Patrícia E. F.; Ribeiro, Leandro Passos; Rosmaninho, Marcelo Gonçalves; Ardisson, José Domingos; Dias, AndersonIn this work, a new two-step route to store and transport associated natural gas, promoted by Ni, Fe and Co supported catalyst was presented. Initially, CH4 is converted into carbon deposits (M/C composite), being Fe catalyst the most active catalyst. In Step 2, M/C composite reacts with H2O producing H2, CO and CH4. TPO experiments showed that efficiency and selectivity of oxidation depends on the metal. Ni ca...