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Gasification improvement of a poor quality solid recovered fuel (SRF): Effect o...

The need to produce energy from poor quality carbonaceous materials has increased, in order to reduce European dependency on imported fuels, diversify the use of new and alternative fuels and to guarantee secure energy production routes. The valorisation of a poor quality solid residual fuel (SRF), with high content of ash and volatile matter, through its conversion into fuel gas was studied. The rise of gasifi...

Pneumonia grave por influenza B em recém-nascido

A infecção por vírus influenza B é rara no período neonatal com uma incidência desconhecida. Relata-se o caso de uma recém-nascida de termo, reinternada ao nono dia de vida por quadro de má perfusão periférica, gemido, dificuldade alimentar e dificuldade respiratória com necessidade de ventilação mecânica, óxido nítrico inalado e surfactante. A radiografia de tórax no primeiro dia apresentava infiltrado interst...

Recém-nascidos Leves para a Idade Gestacional numa População Suburbana. Incidên...

Introdução Foi objectivo deste trabalho de caso-controlo prospectivo e longitudinal conhecer a incidência de recém-nascidos leves para a idade gestacional durante um ano no Hospital Fernando Fonseca, identificar alguns dos possíveis factores de risco e as complicações surgidas até à alta hospitalar.Participantes e métodosForam incluídos os recém-nascidos com peso abaixo do percentil 10 das Tabelas de Lubchenco ...

Produção de xilitol: uma via alternativa de valorização do bagaço de azeitona e...

Sorption of lead (Pb2+) from aqueous solutions using chars obtained in the pyro...

Carbonaceous solid products resulting from thermochemical processes (pyrolysis, gasification), commonly known as chars, are emerging as low-cost sorbents of metallic contaminants, being their effectiveness already demonstrated in several studies (Inyang et al., 2012; Fuente-Cuesta et al., 2012; Ko³odyñska et al., 2012; Quek and Balasubramanian, 2009; Devecia and Kar, 2013). Given the fact that the commercial v...

Hydrogenation of rapeseed oil for production of liquid bio-chemicals

The main objective of rapeseed oil hydrogenation tests was the production of liquid bio-chemicals to be used as renewable raw material for the production of several chemicals and in chemical synthesis to substitute petroleum derived stuff. As, hydrogenation of vegetable oils is already applied for the production of biofuels, the work done focused in producing aromatic compounds, due to their economic value. The...

Effect of syngas composition on hydrogen permeation through a Pd–Ag membrane

Hydrogen separation from a syngas mixture with different compositions was studied by using a Pd–Ag membrane. The effect of temperature (from 300 C to 600 C) and of relative pressure (from 0.2 MPa to 0.5 MPa) was studied. In general, rises of both these parameters allowed increasing H2 permeate flux. The Pd–Ag membrane showed to have a great selectivity, as when inlet gas mixture contained different compositio...

Fermentation of biomass-derived syngas to ethanol and acetate by clostridium l...

In the biochemical pathway of lignocellulosics conversion into fuels, a significant portion of biomass cannot be hydrolysed to fermentable sugars and remains as waste substrate that, due to its recalcitrance, is not converted to ethanol by microorganisms. In terms of product yield, this residual biomass represents renewable feedstock that is being wasted, which contradicts the target of 100% feedstock utilisati...

Characterization of chars produced in the co-pyrolysis of different wastes: dec...

The present work is devoted to the study of chars obtained in the co-pyrolysis of plastics, biomass and tyres wastes. The chars were extracted with several organic solvents in order to assess the more efficient in redicing the organic load of trhe chars and, therefore their toxicity. The ability of each selected extractant to remove toxic pollutants was evaluated by comparing the extracts yield and thoroughly ...

Study of the slow batch pyrolysis of mixtures of pin, plastics and tires