Pyrolysis kinetics of lignocellulosic materials
- Middle East Technical Univ., Ankara (Turkey). Dept. of Chemical Engineering
Pyrolysis kinetics of almond and hazelnut shells and beech wood were carried out using a thermogravimetric technique. Experiments were repeated for different final pyrolysis temperatures ranging from 300 to 850 C. Approximately 90% of the pyrolysis reactions were completed up to 450 C. The initial values of the activation energy of pyrolysis reaction were found to be around 22 kcal/mol for shells of almond and hazelnut. On the other hand, initial activation energy of beech wood pyrolysis was found as 29.4 kcal/mol. Results indicated that a first-order decomposition in terms of volatile content of the reactant showed good agreement with the data only at the initial stages of the reaction. The reaction rate constant was found to decrease with reaction extent due to the changes in the chemical and physical structure of the solid. Among several models proposed, a model which predicted an increase of activation energy with reaction extent gave the best agreement with the experimental data.
- OSTI ID:
- 5745037
- Journal Information:
- Industrial and Engineering Chemistry Research; (United States), Vol. 32:11; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pyrolysis Pathways of Sulfonated Polyethylene, an Alternative Carbon Fiber Precursor
Restoring ZSM-5 performance for catalytic fast pyrolysis of biomass: Effect of regeneration temperature
Related Subjects
CELLULOSE
PYROLYSIS
ACTIVATION ENERGY
BEECH TREES
CHEMICAL REACTION KINETICS
LIGNIN
NUTS
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
THERMAL GRAVIMETRIC ANALYSIS
WOOD
CARBOHYDRATES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY
FOOD
FRUITS
GRAVIMETRIC ANALYSIS
KINETICS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
ORGANIC COMPOUNDS
PLANTS
POLYSACCHARIDES
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SACCHARIDES
TEMPERATURE RANGE
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
TREES
090900* - Biomass Fuels- Processing- (1990-)