The development of renewable energies and alternative fuels for environmental sustainability represents one of the most important current challenges. Energy from biomass is recognized as the renewable energy source with the highest potential towards sustainable development in the near future. Thermochemical conversion is considered a very flexible conversion platform, capable of accepting a wide range of feedstocks and also producing a wide range of energy vectors and chemicals with high efficiencies. The efficiency depends on many factors such as feedstock properties, reactor design and reaction conditions. Devolatilization is a basic mechanism for all thermochemical processes (pyrolysis, combustion, gasification). A detailed characterization of biomass devolatilization is required to provide fundamental parameters for the feasibility, design, modelling, optimisation and scaling of biomass conversion systems. Therefore, a detailed knowledge of the devolatilization behaviour of different biomasses including reaction kinetics and products distribution, plays an important role in the efficient design of thermochemical processes for the conversion of biomass into energy and chemicals. In the present study the devolatilization behaviour of several biomass fuels of different origins was investigated: biomass from energy crops, agricultural residues, and torrefied biomass. Different models were used for the estimation of the devolatilization kinetics from thermogravimetric data. Thermogravimetric analysis coupled with Fourier Transformed InfraRed spectroscopy of evolved gases (TG-FTIR) was applied for the characterization of products evolved in the devolatilization of the selected biofuels. An advanced pilot scale system was employed for the study of gaseous devolatilization species in high temperature and heating rate conditions.
CHARACTERIZATION OF THE DEVOLATILIZATION PRODUCTS OF SELECTED SECOND GENERATION BIOFUELS
BARONTINI, FEDERICA;BIAGINI, ENRICO;TOGNOTTI, LEONARDO
2015-01-01
Abstract
The development of renewable energies and alternative fuels for environmental sustainability represents one of the most important current challenges. Energy from biomass is recognized as the renewable energy source with the highest potential towards sustainable development in the near future. Thermochemical conversion is considered a very flexible conversion platform, capable of accepting a wide range of feedstocks and also producing a wide range of energy vectors and chemicals with high efficiencies. The efficiency depends on many factors such as feedstock properties, reactor design and reaction conditions. Devolatilization is a basic mechanism for all thermochemical processes (pyrolysis, combustion, gasification). A detailed characterization of biomass devolatilization is required to provide fundamental parameters for the feasibility, design, modelling, optimisation and scaling of biomass conversion systems. Therefore, a detailed knowledge of the devolatilization behaviour of different biomasses including reaction kinetics and products distribution, plays an important role in the efficient design of thermochemical processes for the conversion of biomass into energy and chemicals. In the present study the devolatilization behaviour of several biomass fuels of different origins was investigated: biomass from energy crops, agricultural residues, and torrefied biomass. Different models were used for the estimation of the devolatilization kinetics from thermogravimetric data. Thermogravimetric analysis coupled with Fourier Transformed InfraRed spectroscopy of evolved gases (TG-FTIR) was applied for the characterization of products evolved in the devolatilization of the selected biofuels. An advanced pilot scale system was employed for the study of gaseous devolatilization species in high temperature and heating rate conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
