Encontrados 13 documentos, a visualizar página 1 de 2
Production of low-cost adsorbents with tunable surface chemistry by conjunction...
Roman, Silvia; Valente Nabais, Joao; Ledesma, Beatriz; Gonzalez, Juan; Laginhas, Carlos; Titirici, MariaWe report a new methodology to produce activated carbons from biomass-derived hydrothermal carbons using air and carbon dioxide. The activation step is crucial to develop porosity in the hydrothermal carbons. Additionally different surface functionalities are also introduced on the surface of the final materials. Our method based on initial hydrothermal carbonization of lignocellulosic biomass (walnut shell, su...
HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT...
Valente Nabais, Joao; Roman, Silvia; Laginhas, Carlos; Ledesma, Beatriz; Gonzalez, JuanHydrothermal carbonization processes were studied under different conditions using two different biomass materials: walnut shell and sunflower stem. Coalification under mild conditions was promoted with the aim of increasing the calorific value of the solid hydrochar. Hydrocarbonization processes brought up an increase on the heating value of the materials up to 28.9 and 29.3 MJ kg−1, for sunflower stem and wal...
Study of the contributions of non-specific and specific interactions during flu...
Valente Nabais, Joao; Roman, Silvia; Gonzalez, Juan; Garcia, Carmen; Ortiz, AngelThe adsorption of fluoxetine onto activated carbons (ACs) prepared from almond tree pruning by steam and CO2 activation under different temperature conditions (650– 9508C), was studied. In both series increasing the temperature caused an increase in the BET apparent surface area, yielding ACs with SBET up to 870 and 710m2 g 1 after steam and CO2 activation, respectively. Also, a slight widening of the porosity ...
PRODUCTION OF CARBON MATERIALS BY CONJUNCTION OF HYDROTHERMAL AND ACTIVATION PR...
Valente Nabais, Joao; Laginhas, Carlos; Carrott, Peter; Ribeiro Carrott, Manuela; Titirici, Magdalena; Roman, SilviaActivated Carbons (AC) are traditionally produced by chemical or physical activation processes, frequently using biomass materials as precursors [1]. These procedures can be modified in order to create particular surface characteristics (both textural and chemical), so that the adsorption of a given organic or inorganic compound is optimized. Recently, the use of hydrothermal carbonization processes (HTC) to pr...
A vida para alem da morte dos produtos agrícolas.
Nabais, Joao; Laginhas, Carlos; Carrott, Peter; Ribeiro carrott, Manuela; Roman, SilviaEStudo da utilização de vários residuos agricolas para a produção de carvões activados
Influence of hydrocarbonization conditions on the porosity of derived carbon di...
Roman, Silvia; Ledesma, Beatriz; Nabais, Joao; Laginhas, CarlosInfluence of hydrocarbonization conditions on the porosity of derived carbon dioxide activated carbons
Hydrothermal carbonization of biomass-an effective method of increase its calor...
Roman, Silvia; Nabais, Joao; Laginhas, CarlosEstudo da influencia da carbonização hidrotermica na valorização energética
Development of Carbon Materials from Natural Products for Environmental Applica...
Nabais, Joao; Laginhas, Carlos; Carrott, Peter; Ribeiro Carrott, Manuela; Roman, Silvia; Galacho, Cristina; Roman, SilviaEstudo da aplicação de carvões activados na despoluição de águas
A vida para alem da morte dos produtos agrícolas.
Nabais, Joao; Laginhas, Carlos; Roman, Silvia; Carrott, Peter; Ribeiro Carrott, ManuelaPreparação de carvões activados a partir de residuos agricolas.
Fluoxetine adsorption from aqueous solution onto activated carbons
Valente Nabais, Joao; Roman, Silvia; Carrott, Peter; Carrott, ManuelaWith these premises, this work aimed to prepare ACs from almond tree pruning by physical activation processes with steam and carbon dioxide, under different temperature conditions. Selected samples were impregnated with triethylenediamine (TEDA, 5%wt.) by sublimation. The ACs characterization was made by N2 adsorption at 77 K (AUTOSORB-1, Quantachrome), mercury porosimetry (AUTOPORE 4900 IV, Micromeritics), hel...
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