7 documents found, page 1 of 1
Modeling and simulation of a fixed bed gasification process for thermal treatme...
Oliveira, Matheus; Ramos, Ana; Monteiro, Eliseu; Rouboa, AbelThis work aims to develop a numerical simulation model of the combined and integrated production process of combustion and gasification, for a synthesis gas production system (SYNGAS), fed with municipal solid waste (MSW), agricultural and forestry waste. For this purpose, the EMSO software (Environment for Modeling, Simulation, and Optimization) was used in the formulation of a fixed-bed gasifier with the co-c...
Numerical modeling of plasma gasification process of polychlorinated biphenyl w...
Okati, Armin; Khani, Mohammad Reza; Shokri, Babak; Monteiro, Eliseu; Rouboa, AbelThe plasma gasification process is one of the most innovative and efficient methods for the disposal of various wastes and energy production. But it is still an extremely complicated process; therefore, to optimize it, modeling could be used as an invaluable asset. The aim of this study is to develop a computational model to evaluate the plasma gasification process of polychlorinated biphenyl wastes. The model ...
Characterization of Municipal, Construction and Demolition Wastes for Energy Pr...
Alves, Octávio; Passos, Jeysa; Brito, Paulo; Gonçalves, Margarida; Monteiro, EliseuGasification of wastes is considered a promising alternative for energy generation due to its lower environmental impacts when compared with conventional landfilling and incineration. Valorisation of such wastes improves sustainability of resource management and of energy production. However, an appropriate characterisation of wastes in terms of physical and chemical properties is essential for the prediction o...
A holistic review on biomass gasification modified equilibrium models
Ferreira, Sérgio; Monteiro, Eliseu; Brito, Paulo; Vilarinho, CândidaBiomass gasification is realized as a settled process to produce energy in a sustainable form, between all the biomass-based energy generation routes. Consequently, there are a renewed interest in biomass gasification promoting the research of different mathematical models to enlighten and comprehend gasification process complexities. This review is focused on the thermodynamic equilibrium models, which is the ...
Experimental and modeling analysis of brewers´ spent grains gasification in a d...
Ferreira, Sérgio; Monteiro, Eliseu; Calado, Luís; Silva, Valter; Brito, Paulo; Vilarinho, CândidaThe first part of the current reported work presents experimental results of brewers’ spent grains gasification in a pilot-scale downdraft gasifier. The gasification procedure is assessed through various process characteristics such as gas yield, lower heating value, carbon conversion efficiency, and cold gas efficiency. Power production was varied from 3.0 to 5.0 kWh during the gasification experiments. The pr...
Experimental analysis of brewers’ spent grains steam gasification in an allothe...
Ferreira, Sérgio; Monteiro, Eliseu; Brito, Paulo; Castro, Carlos; Calado, Luís; Vilarinho, CândidaIn this work, brewers’ spent grains (BSG) were evaluated and studied in order to obtain a combustible gas by means of allothermal steam gasification. BSG were preprocessed in a rotary dryer and a pelletizer prior to gasification in an indirectly heated batch reactor. BSG characterization was conducted by means of proximate, ultimate, and thermogravimetric analysis, allowing us to conclude that BSG have characte...
Modelling higher heating value of different separated fractions from municipal ...
Alves, Octávio; Gonçalves, Margarida; Brito, Paulo; Monteiro, EliseuHigher heating value (HHV) is an important property of biomass and wastes used to evaluate their potential conversion to useful thermal or electric energy. Because the measurement of this property requires expensive resources and is somewhat time-consuming, many works focused their attention on the determination of mathematic models relating the HHV with the composition of lignocellulosic biomass or other fuel ...