Encontrados 53 documentos, a visualizar página 1 de 6
Localized Pigmented Villonodular Synovitis of the Shoulder: a Rare Presentation...
Madruga Dias, João; Serviço de Reumatologia. Hospital de Santa Maria. Centro Hospitalar Lisboa Norte. Lisboa. Portugal.Pigmented Vilonodular Synovitis is a rare clinical entity characterized as a synovial membrane benign tumour, despite possible aggressive presentation with articular destruction. The localized variant is four times less frequent and the shoulder involvement is uncommon. We present the case of a Caucasian 59 year-old patient, who presented with left shoulder pain, of uncharacteristic quality, with local swelling...
Encapsulação de cafeína e diclofnac em carvão activado e MOF ZIF-8
Catarina, João; Silva, José A.C.Neste trabalho desenvolveu-se uma metodologia experimental que utiliza uma técnica de cromatografia frontal num sistema HPLC, com o intuito de medir isotérmicas de adsorção da cafeína e do diclofnac (este conhecido como Voltaren), permitindo medir o grau de encapsulação e a eficiência da libertação controlada. Serão testados dois tipos materiais porosos: o MOF ZIF -8, e o carvão ativado Norit SX PLUS como poten...
Hexane isomers sorption on the rigid framework MOF MIL-100(Cr)
Mendes, Patricia; Silva, José A.C.; Rodrigues, A.E.In this work we studied the hexane isomers sorption on the MIL-100(Cr) [1]. The first part of the study was related to the pattern MIL-100(Cr) solid, the second dealt with the MIL-100(Cr) grafted with EtAp (Ethylamine pure) and the third with MIL-100(Cr)MEDA (Methyl ethylene diamine). The synthesis and characterization of MIL-100 (Cr), MIL-100(Cr)EtAp and MIL-100(Cr)MEDA was performed at Institut Lavoisier de V...
Porous solids for biogas upgrading
Silva, José A.C.; Rodrigues, A.E.In this work, we will present sorption equilibrium, kinetic and fixed bed data of CO2, CH4 in MOF-508b and zeolite 13X at 303, 323 and 343 K and partial pressures up to 4.5 bar. These data are fitted with appropriate isotherm models. At the same time single, binary and ternary breakthrough curves were measured to provide required data to develop and validate a mathematical model based on the LDF approximation f...
Porou solids for biogas upgrading and CO2 sequestration
Silva, José A.C.; Rodrigues, A.E.In this work, we will present sorption equilibrium, kinetic and fixed bed data of CO2, CH4 in MOF-508b and zeolite 13X at 303, 323 and 343 K and partial pressures up to 4.5 bar. These data are fitted with appropriate isotherm models. At the same time single, binary and ternary breakthrough curves were measured to provide required data to develop and validate a mathematical model based on the LDF approximation f...
Porous solids for biogas upgrading
Silva, José A.C.; Rodrigues, A.E.In this work, we will present sorption equilibrium, kinetic and fixed bed data of CO2, CH4 in MOF-508b and zeolite 13X at 303, 323 and 343 K and partial pressures up to 4.5 bar. These data are fitted with appropriate isotherm models. At the same time single, binary and ternary breakthrough curves were measured to provide required data to develop and validate a mathematical model based on the LDF approximation f...
Multicomponent hexane isomers sorption on MOF ZIF-8
Mendes, Patricia; Silva, José A.C.; Rodrigues, A.E.; Horacajada, Patricia; Serre, ChristianThe main goal of this research focuses on the development of an adsorptive process to separate hexane isomers (kinetic diameter very similar) in order to improve the quality of gasoline measured by the octane number (RON). In this investigation, studies of sorption equilibrium of hexane isomers: n-hexane (RON 25), 3-methylpentane (RON 75), 2,3-dimethylbutane (RON 103) and 2,2-dimethylbutane (RON 94) were perfor...
Adsorption equilibrium and diffusion ofmethane and carbon dioxide on binderless...
Silva, José A.C.; Schumann, Kristin; Rodrigues, A.E.Equilibrium and kinetics of sorption of CO2 and CH4 on a new type of binderless on of 13X zeolite. The equilibrium data is measured in a breakthrough apparatus and the kinetic data by the ZLC technique.
Functionalization of metal-organic frameworks for hexane isomers separation
Mendes, Patricia; Rodrigues, A.E.; Ragon, Florence; Horcajada, Patricia; Serre, Christian; Silva, José A.C.This work shows the effect of incorporating three different organic ligands (NH2-H2BDC, NO2-H2BDC and Br-H2BDC) into UIO-66(Zr) framework viewing the separation of hexane isomers(22DMB, 23DMB, 3MP and nHEX).
Sorption of carbon dioxide on binderless beads of 13X
Silva, José A.C.; Schumann, Kristin; Rodrigues, A.E.The sorption equilibrium of CO2 and CH4 in binderless beads of 13X zeolite has been investigated between 313 and 373 K and pressure up to 4 atm. The amount adsorbed of CO2 and CH4 is around 5.2 mmol/gads and 1.2 mmol/gads, respectively, at 313 K and 4 atm. Comparing these values with the ones in literature the value of CO2 is 20% higher than in CECA 13X binder pellets. The crystal diffusivity of CO2 measured ex...
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