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The reaction behaviour of two different coals is analysed in a pressurised entrained flow reactor (PiTER) and a pressurised thermogravimetric analyser (PRETA). The entrained flow reactor is used to produce char samples under conditions relevant to larger scale entrained flow gasifiers, i.e. at temperatures up to 1600°C and pressures up to 2.5MPa. The conversion rate of these char samples is measured...
The paper presents a model framework that describes the reactions kinetics of entrained flow gasification. The model consists of different submodels for fuel devolatilisation, intrinsic char gasification, surface area evolution, char thermal annealing, pore diffusion, boundary layer diffusion, and particle size and density variation. These submodels are partly derived from measurements in previous...
The devolatilisation behaviour of solid fuels and the reactivity of the resulting char are important design parameters for entrained flow gasifiers. The volatile yield and devolatilisation rate of two coals are measured in a pressurised high temperature entrained flow reactor at up to 1600°C and 4.0MPa and in a wire mesh reactor. A pyrolysis model is derived that describes the influences of temperature,...
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