Kinetics and products from flash pyrolysis of cellulose acetate butyrate (CAB) at 460–600°C
| Autor: | H. Arisawa, Thomas B. Brill, Polly E. Gongwer |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Arrhenius equation
Chemistry General Chemical Engineering Kinetics General Physics and Astronomy Energy Engineering and Power Technology Ketene General Chemistry Activation energy Atmospheric temperature range chemistry.chemical_compound symbols.namesake Fuel Technology Desorption symbols Physical chemistry Organic chemistry Pyrolysis Chemical decomposition |
| Zdroj: | Combustion and Flame. 109:370-381 |
| ISSN: | 0010-2180 |
| Popis: | Cellulose acetate butyrate (CAB) was flash-pyrolyzed at 600–1000°C/s to temperatures in the 460–600°C range under 1 atm Ar. By using nonnegative least squares analysis of the data, 11 specific products (CO, CO2, acids, esters, ketenes, aldehydes, and CAB oligomers) were resolved as a function of concentration and time. Ketene and ethyl ketene are the most novel products. The values of the Arrhenius activation energy are 20–45 kcal/mol at 460–520°C ± 20°C, and 2–13 kcal/mol at 520–600°C ± 20°C. These data are interpreted as resulting predominately from bulk-phase decomposition reaction rates in the lower temperature range, and from desorption/evaporation rates in the higher temperature range. A global Arrhenius expression that combines these processes is presented to model the kinetic results. |
| Databáze: | OpenAIRE |
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