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Surface and porous characterisation of activated carbons made from a novel biom...
Nabais, Joao; Laginhas, Carlos; Ribeiro Carrott, Manuela; Carrott, Peter; Crespo Amoros, Jose; Nadal Gisbert, AntonioIn the work now reported the production of activated carbons from a novel precursor, esparto grass, by activation with carbon dioxide is presented. The results show that the materials produced have interesting properties, namely BET apparent surface area and pore volume up to 1122 m2 g−1 and 0.46 cm3 g−1, respectively. The activated carbons have basic characteristics with point of zero charge between 9.25 and 1...
Produção de materiais de carbono a partir de carbonização hidrotérmica
Laginhas, Carlos; Valente Nabais, Joao; Carrott, Peter; Ribeiro Carrott, ManuelaNo presente trabalho é reportado a produção e caracterização de carvões activados por um processo de carbonização hidrotérmia a partir de açucares simples e complexos.
Professor Ken Sing: A Festschrift
Carrott, Peter; Branton, Peter; Llewellyn, Philip; Muller, ErichIt is with great pleasure that we dedicate this double issue of Adsorption Science & Technology to Professor K.S.W. Sing in honour of his 65th year of active work and research in the area of adsorption and to coincide with his 88th birthday. This special volume brings together a dozen invited academic and industrial contributions from his former doctoral students and colleagues. The papers come from all co...
Propriedades estruturais e estabilidade hidrotérmica de titanosilicatos do tipo...
Velho, Filipe; Galacho, Cristina; Carrott, Manuela; Carrott, Peter; Nabais, JoãoNeste trabalho apresentam-se os resultados da caracterização textural e da estabilidade estrutural de materiais mesoporosos ordenados, do tipo SBA-15, com elevado teor de titânio, que foram preparados por um método de síntese direta, por via hidrotérmica, designado por híbrido dado que se fundamentou nos procedimentos de síntese previamente estabelecidos na literatura.
The influence of the activated carbon post-treatment on the phenolic
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Falcão, Ana I.; Ribeiro Carrott, M . Manuela L.; Carrott, Peter J. M.The aim of this research was to investigate how post treatment modification, such as those with sodium hydroxide or urea, can influence the capacity of activated carbon (AC) for phenolic compounds removal from liquid media. The ACs modification was performed using urea impregnation followed by pyrolysis at high temperature. With all ACs used, this treatment induced a pore volume increase, a mean pore size broad...
On the use of ethanol for evaluating microporosity of activated carbons prepare...
Carrott, Peter J. M.; Cansado, Isabel P. P.; Mourão, Paulo A. M.; Ribeiro Carrott, M. Manuela; Louro, Nélio D. B.; Albiniak, A.; Broniek, E.Microporous activated carbons prepared by KOH chemical activation or steam activation from lignite were characterised by adsorption of N2 at 77 K and CO2 at 298 K. Subsequently, the adsorption of ethanol was carried out and complemented by adsorption of benzene and cyclohexane. The isotherm analysis included application of the αs method using ethanol reference data obtained here by also studying non-porous carb...
Production and characterization of activated carbons made from sunflower stems
Valente Nabais, Joao; Laginhas, Carlos; Carrott, Peter; Ribeiro Carrott, ManuelaActivated carbons (ACs) are artificial materials, prepared from natural or synthetic precursors that are worldwide extensively used. The ACs main characteristics are the noticeable adsorption capabilities provided by the highly developed porous structure and the rich surface chemistry. Because of their versatility and properties the final material can be tailored to have specific properties suitable for a wide ...
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...
Direct Nitrogen Enrichment of Activated Carbon Produced from Synthetic or Natur...
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Carrott, Peter J. M.; Carrott, Manuela L. R.The specific application of activated carbons (AC) as adsorbents for gases and vapours depends on the properties of pollutants to be removed, but the performance of the AC depends on various properties. If their porosity is the main parameter in gas adsorption, the chemical nature of their surface plays a significant role in liquid phase interactions and in their usefulness as catalyst support materials. Of par...
Activated Carbon Post Treatment - Influence on Phenolic Compounds Removal
Cansado, Isabel P. P.; Mourão, Paulo A. M.; Falcão, Ana I.; Ribeiro Carrott, M. Manuela; Carrott, Peter J. M.● AC preparation from different precursors and their modification / optimisation with sodium hydroxide and urea to improve the adsorption capacities for phenolic compounds from the liquid phase. ● Comparative study of the influence of textural and chemical parameters of AC on the liquid phase adsorption.
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