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MULTISTAGE MODELING AND EXPERIMENTAL DESIGN FOR THE ASSESSMENT OF SUITABLE ENERGY CONVERSION SCENARIOS OF WETLAND BIOMASS

Pubblicazione


Autore: F. Patuzzi, M. Baratieri

Collana: CA - 66 - Rende 2011

Note:
The aim of this work is the individuation and feasibility evaluation of different scenarios of energy conversion of reed, a wetland biomass, according to its characteristics (composition and heating value) and keeping into account torrefaction and gasification paths. This kind of evaluation is a first step in the assessment of the process efficiency, by means of thermodynamic modeling and experimental characterization applied at the process scale.
Samples of reeds collected during an international expedition have been characterized by means of elemental and calorimetric analysis. The results of these analyses are in according with literature data. An enhanced gas-solid equilibrium model has been used in order to estimate the theoretical yield and the equilibrium composition of the reaction products (syngas and char) of reeds gasification. In order to evaluate the benefit of a torrefaction pre-treatment, the thermodynamic model has been coupled with a multiphase kinetic model calibrated with experimental data and able to predict solid, liquid and gaseous conversion of the torrefaction process. The experimental validation of the models results will be carried out in a bench-scale quartz reactor suitable for torrefaction and gasification processes. The design and preliminary set up of this experimental apparatus will be presented in this work. Reeds seem to be a suitable biomass for energy purposes and, thanks to its high abundance in the studied areas, could be an interesting energy source.


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