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Kinetics of the pyrolysis of cellulose in the temperature range 250–300°C.
Author(s) -
Lipska Anne E.,
Parker William J.
Publication year - 1966
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1966.070101005
Subject(s) - volatilisation , pyrolysis , char , decomposition , isothermal process , activation energy , thermal decomposition , kinetics , cellulose , atmospheric temperature range , chemical engineering , materials science , chemical process of decomposition , chemistry , chemical decomposition , analytical chemistry (journal) , organic chemistry , thermodynamics , physics , quantum mechanics , engineering
Samples of α‐cellulose, containing 0.11–0.14% ash, were isothermally pyrolyzed in a fluidized bath in a nitrogen environment at 250–298°C. Results were reported in terms of volatilization (based on weight‐loss measurements) and decomposition (in term of glucosan loss). The findings show three distinct stages of pyrolysis: ( 1 ) an initial period of rapid decomposition and weight loss; ( 2 ) a range in which both the volatilization and decomposition are of zero order; ( 3 ) a region in which the volatilization follows a first‐order rate, leaving a char deposit which does not undergo further pyrolysis. The degree of decomposition and volatilization occurring during the zero‐order phase increases with increasing temperature. A single activation energy of 42 kcal./mole describes both the decomposition and volatilization rates in the zero‐order phase over the entire 250–298°C. range.