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Slagging and fouling during coal and biomass cofiring: chemical equilibrium mod...
Teixeira, P. Alexandra; Lopes, M. Helena; Gulyurtlu, Ibrahim; Lapa, N.; Abelha, PedroA thermodynamic model was applied to foresee the occurrence of fouling, slagging, and bed agglomeration phenomena during fluidized bed monocombustion of three different types of biomass, namely straw pellets, olive cake, and wood pellets. The cocombustion effect in reducing the occurrence of deposits and agglomerates of blends of 5, 15, and 25% (wt.) biomass with coal was also assessed. Chemical fractionation w...
Gasification improvement of a poor quality solid recovered fuel (SRF): Effect o...
Pinto, Filomena; André, Rui Neto; Carolino, Carlos; Miranda, Miguel; Abelha, Pedro; Direito, Daniel; Perdikaris, Nikos; Boukis, IoannisThe 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...
Evaluation of slagging and fouling tendency during biomass co-firing with coal ...
Teixeira, P. Alexandra; Lopes, M. Helena; Gulyurtlu, Ibrahim; Lapa, N.; Abelha, PedroOver the last decades, several indices based on ash chemistry and ash fusibility have been used to predict the ash behaviour during coal combustion, namely, its tendency for slagging and fouling. However, due to the physicalechemical differences between coals and biomass, in this work only the applicability of an ash fusibility index (AFI) to the combustion and co-combustion of three types of biomass (straw pel...
Fluidised bed combustion of two species of energy crops
Abelha, Pedro; Franco, Carlos; Lopes, M. Helena; Gulyurtlu, Ibrahim; Cabrita, IsabelThe use of biomass fuels for energy production through combustion has a growing application worldwide mainly for two reasons: first, the utilization of biomass for energy contributes to mitigate emission of green house gases; second, its use decreases the dependence of imported fossil fuels in Europe. The objective of this work was to study the combustion behaviour of two endogenous biomass species: cardoon (cy...
Emissões gasosas durante a co-combustão de carvão com resíduos
Abelha, PedroDissertação para a obtenção do Grau de Doutor em Engenharia Química especialidade Engenharia de Reacção Química ; A biomassa e os resíduos não tóxicos poderão desempenhar um papel importante no âmbito do programa comunitário para encorajar o uso de energias renováveis. No entanto, a experiência mostra que a disponibilidade destes materiais poderá ser um sério obstáculo para uma utilização energética em grande...
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