Errors involved in the activation energy calculated by integral methods when the frequency factor depends on the temperature ( A = A 0 T m) |
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Authors: | J M Cai and R H Liu |
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Institution: | (1) Biomass Energy Engineering Research Center, School of Agriculture and Biology, Shanghai Jiao Tong University, 2678 Qixin Road, Shanghai, 201101, P.R. China |
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Abstract: | The dependence of the frequency factor on the temperature (A=A
0
T
m) has been examined and the errors involved in the activation energy calculated from some integral methods without considering
such dependence have been estimated. Investigated integral methods are the Coats-Redfern method, the Gorbachev-Lee-Beck method,
the Wanjun-Yuwen method and the Junmeng-Fusheng method. The results have shown that the error in the determination of the
activation energy calculated ignoring the dependence of the frequency factor on the temperature can be rather large and it
is dependent on x=E/RT and the exponent m. |
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Keywords: | activation energy frequency factor integral method non-isothermal kinetic analysis |
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