Tesis doctoral de Claudia Juliana Gomez Diaz
The abundant research literature on the field of biomass pyrolysis kinetics still leaves key issues unsolved. The exploitation of the information provided by thermogravimetry requires the establishing of appropriate models and evaluation strategies for the various biomass materials. The kinetic description of experiments measured at different conditions by exactly the same reaction kinetics is criticized due to some small, but inevitable systematic errors that depend on the experimental conditions. Practical models that predict the evolution of specific products of interest are still expected in the literature. Part of the chemical phenomena referred to the secondary interactions between the primary pyrolysis products has been traditionally avoided when modeling the pyrolytic process. The increased exploitation of herbaceous crops, in addition to the large quantity of woody residues that still remains largely unused, currently ask for a better description of the influence of the heterogeneities on biomass thermolysis. this thesis addresses all these issues in the context of fundamental research. The thermal behavior of biomass materials representative of carpentry residues (pine and beech), and an energy plantation (thistle) is studied by different thermoanalytical techniques, within the range of slow pyrolysis, including various pretreatments to eliminate inorganic matter and extractives. The first contribution aims at deeply observing the extent of systematic errors associated to the experimental part of the thermogravimetric studies. The thermal behavior of the same feedstock in different original equipments, under roughly equivalent experimental conditions, is statistically studied. Then, various approaches based on first and nth-order partial reactions in the summative model of pseudocomponents are employed in order to determine the best kinetic parameters that describe the experiments both at linear and stepwise heating programs and for experiments coming fro
Datos académicos de la tesis doctoral «Understanding biomass pyrolysis kinetics: improved modeling -based on -comprehensive -thermokinetic analysis«
- Título de la tesis: Understanding biomass pyrolysis kinetics: improved modeling -based on -comprehensive -thermokinetic analysis
- Autor: Claudia Juliana Gomez Diaz
- Universidad: Politécnica de catalunya
- Fecha de lectura de la tesis: 18/01/2007
Dirección y tribunal
- Director de la tesis
- Luis Puijaner Corbella
- Tribunal
- Presidente del tribunal: José María Salla tarragó
- valerio Cozzani (vocal)
- Pis Martinez José Juan (vocal)
- Manya cervello joan j. (vocal)