Cellulose pyrolysis kinetics in a simulated solar environment

Journal Article · Thu Jun 01 00:00:00 EDT 1989 · Industrial and Engineering Chemistry Research; (USA)

DOI:https://doi.org/10.1021/ie00090a031· OSTI ID:6914635

Tobatabaie-Raissi, A ^[1]; Antal, Jr, M J ^[2]

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1. Florida Solar Energy Center, Cape Canaveral, FL (USA)
2. Hawaii Univ., Honolulu, HI (USA). Dept. of Mechanical Engineering

The instrumentation and methods required to study rapid, radiative decomposition of highly reactive biopolymers are described and used to determine the kinetic parameters for the pyrolysis of Avicel PH105 microcrystalline cellulose. Experiments were carried out at heating rates greater than 2K/s in a specially fabricated thermogravimetric analyzer system which employed a 30-kW{sub e}/2-kW/th downward-facing beam, arc-image furnace as a heat source. The thermogravimetric data were interpreted assuming a simple, single-step reaction mechanism and using a nonlinear least-squares kinetic analysis. Based on the results, and apparent activation energy of 100.5 {plus minus} 3kJ/mol, a preexonential factor of in (A (s{sup 1})) = 14 {plus minus} 0.5, and nearly a first-order (n = 0.9 {plus minus} 0.05) reaction were obtained. The extent of char formation was determined experimentally and found to be in the range 6.6-8.4% by weight of original dry material depending upon the prevailing reaction conditions.

• OSTI ID: 6914635
• Journal Information: Industrial and Engineering Chemistry Research; (USA), Vol. 28:6; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
14 SOLAR ENERGY
CELLULOSE
PYROLYSIS
ACTIVATION ENERGY
CHARS
CHEMICAL REACTION KINETICS
ENERGY CONVERSION
EXPERIMENTAL DATA
LEAST SQUARE FIT
NONLINEAR PROBLEMS
RESOURCE CONSERVATION
SOLAR RADIATION
THERMAL GRAVIMETRIC ANALYSIS
CARBOHYDRATES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CONVERSION
DATA
DECOMPOSITION
ENERGY
GRAVIMETRIC ANALYSIS
INFORMATION
KINETICS
MAXIMUM-LIKELIHOOD FIT
NUMERICAL DATA
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
POLYSACCHARIDES
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
RADIATIONS
REACTION KINETICS
SACCHARIDES
STELLAR RADIATION
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
090900* - Biomass Fuels- Processing- (1990-)
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry
140905