This paper studies the use of biomass syngas, obtained from pyrolysis or gasification, in traditional energy-production systems, specifically internal combustion (IC) engines and combined cycle gas turbine (CCGT) plants. The biomass conversion stage has been simulated by means of a gas–solid thermodynamic model. The IC and CCGT plant configurations were optimised to maximise heat and power production. Several types of biomass feedstock were studied to assess their potential for energy production and their effect on the environment. This system was also compared with the coupling between biomass gasification and fuel cells
Purpose Actually, one of the main challenges to be achieved in biomass gasification is the minimization of tar concentration in combination with optimization of the gas composition. An extensive examination has been performed in order to expose the effect of several Chinese dolomites as a catalyst for tar cracking and gas composition enhancement. In this paper, the experimental data collected are presented. Methods The biomass gasification tests have been performed in a laboratory small-scale atmospheric fluidized bed gasifier that uses nitrogen as a fluidizing media and pure oxygen as gasifying agent. The system is equipped with a ceramic filter and a catalytic bed. Different types of dolomites have been used as catalyst.Results The main results are that the dolomite reduces the tar concentration and at the same time increases the permanent gas yield. A gasification equilibrium model, written in Matlab environment, has been developed to predict the synthesis gas composition. Main conclusions Several biomass gasification tests have been performed to assess the dolomite effect on the syngas and tar composition. The results have been used to tune an equilibrium model up. The model has been modified with some experimental data and it seems to predict with good accuracy the syngas composition.
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