Pyrolysis kinetics of lignocellulosic materials

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00023a021· OSTI ID:5745037

Balci, S; Dogu, T; Yuecel, H ^[1]

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1. 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), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 32:11; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090900* -- Biomass Fuels-- Processing-- (1990-)
ACTIVATION ENERGY
BEECH TREES
CARBOHYDRATES
CELLULOSE
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY
FOOD
FRUITS
GRAVIMETRIC ANALYSIS
KINETICS
LIGNIN
MAGNOLIOPHYTA
MAGNOLIOPSIDA
NUTS
ORGANIC COMPOUNDS
PLANTS
POLYSACCHARIDES
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SACCHARIDES
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
TREES
WOOD