LILIANE LANDINI
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Artigo IPEN-doc 27414 Study of the feasibility of biodiesel production, from vegetable oils and catalysts of seafood residues, in a batch hydrogenation reaction unit, assisted by microwave and conventional heating2020 - ARAUJO, S.G.; LANDINI, L.; SALVADOR, V.L.R.; SCAPIN, M.A.; MASSANARES, B.F.; URBANINHO, A.B.In this work, it was proposed to study the feasibility of biodiesel production, from residues of vegetable oils used in domestic activities, employing (CaCO3) shells prepared like calcium oxide (CaO) as catalysts, in a batch reaction unit, on bench scale, installed at IPENCNEN/ SP. This unit is capable of operating with high pressure hydrogen gas (up to 200bar) and high temperature (up to 500°C, using microwave - MW (2.450MHz, with up to 2kW continuous and 8kW pulsed) and conventional heating – (electric) MC. In the tests, the oil load (mL), type and mass of catalyst, with or without hydrogen gas pressure (bar), temperature (°C), reaction time (h), microwave power (W), the speed of the load (rpm) agitation and the conventional heating were evaluated. The analytical determinations of the samples were carried out by means of density, gas chromatography (GC) and X-ray fluorescence. Data were collected in order to be compared with other methodologies, already used in the literature. The purpose of this work was to analyze the efficiency of the use of these types of catalysts and oils in the production of biodiesel, as an alternative technology. The Ca and CaO contents found in the pink shell, before and after the calcination, were 36.2% and 98.8%, respectively. The best result obtained for the density was 0.875182g/cm3, for the test with 4g of calcined shell catalyst and reaction of 1h. As to the methyl ester content, the highest result was 95.33%, in a test with 4g of catalyst and reaction of 3h. In the non-calcined shell test (22.5g), although the amount of mass used was much larger (5% of the oil mass), the ester content was very low, 2.11%.Artigo IPEN-doc 26287 Preliminary assessment of the content of rare earth elements, uranium and thorium in tantalite after processing with microwave2019 - ARAUJO, SUMAIR G.; LANDINI, LILIANE; ZEFERINO, GABRIEL R.; SALVADOR, VERA L.R.; SCAPIN, MARCOS A.The microwave application of (MW) was studied with the aim of verifying the potentiality in the processing of tantalite containing compounds of rare earth elements (REEs), uranium and thorium (radioactivity level was below the background). The samples were prepared powdered and had, as initial composition, mainly: Ta2O5 (24.20)%, La2O3 (18.00%), CeO2 (6.30%), Nd2O3 (2.35%), Pr6O11 (1.99%), Y2O3 (1.57%), ThO2(0.11%) and U3O8(0.035%). They were processed in the microwave batch reactor (2.45GHz, 2kW). After the processing, the results of characterization by X-Ray Fluorescence (FRX), Scanning Electron Microscopy (SEM) and Energy-Disperse X-Ray Spectroscopy (EDS) showed that the content of the main compounds of REEs, besides Th and U were: La2O3 (9.38%), CeO2 (20.00%), Nd2O3 (6.29%), Pr6O11 (3.58%), Y2O3 (2.57%), ThO2(0.33%) and U3O8(0.036%). This occurred in the samples prepared with distilled water and irradiated with 15bar of H2. These preliminary tests were promising, but more experiments are needed, since many variables may still be explored and laboratory infrastructure is available for this purpose, at IPEN-CNEN/SP. As the demand for the use of REEs is rapidly increasing, due to the various applications (for example, as neutron moderators in nuclear reactors, special magnets, TV screens, cell phones and computers, catalysts, missiles, electric vehicles, wind and solar energy, among others), future studies would make it possible to add value and improve the quality of this ore. Finally, microwave technology could be used as an alternative for the reuse of these elements contained in mineral exploration residues.Resumo IPEN-doc 25424 Estudo da viabilidade de produção de biodiesel, a partir de óleos vegetais e catalisadores de resíduos de frutos do mar, em uma unidade reacional de hidrogenação em batelada, assistida por micro-ondas e aquecimento convencional2018 - ARAUJO, S.A. de; LANDINI, L.; SALVADOR, V.L.R.; SCAPIN, M.A.; MASSANARES, B.F.; URBANINHO, A.B.Neste trabalho a proposta foi a realização de estudo da viabilidade da produção de biodiesel, partir de resíduos de óleos vegetais de atividades domésticas, empregando resíduos de conchas (CaCO3), preparados na forma de óxido de cálcio (CaO) como catalisadores, em uma unidade de reação em batelada, em escala de bancada, instalada no IPEN-CNEN/SP. Ela é capaz de operar com alta pressão de gás hidrogênio (até 200bar) e alta temperatura (até 500°C), utilizando micro-ondas (2.450MHz, com até 2kW contínuo e 8kW pulsado) e aquecimento convencional (elétrico). Nos testes, foram avaliadas as carga de óleo (mL); tipo e massa de catalisador, com ou sem pressão de gás hidrogênio (bar); temperatura (°C); tempo de reação (h); potência de micro-ondas (W); velocidade de agitação da carga (rpm); aquecimento convencional (MC). As determinações analíticas das amostras foram feitas por meio de densidade, cromatografia em fase gasosa (GC), titulação potenciométrica e fluorescência de raios-X. Foram levantados dados, a fim de compará-los com outras metodologias já utilizadas em literatura. A proposta deste trabalho foi analisar a eficiência do uso destes tipos de catalisadores e óleos, na produção de biodiesel, como uma tecnologia alternativa.