Chen-Nuttall equation

Kinetic Expressions. In this study, we have analyzed nonisothermal TGA data using the Chen-Nuttall equation, the widely accepted Coats-Redfern equation, and the Anthony-Howard equation. These equations are derived from simple rate expressions. The basic single reaction kinetic equation for the decomposition of a solid has been presented by Blazek (24) as... 

Comparison Between Coats-Redfern and Chen-Nuttall Equations. The single heating rate data for the temperature range of 300-500°C have been correlated to the CR equation, Eq. (14), and the CN equation, Eq. (8). Three techniques were used to find the optimum values for E and Z in each of these equations. These techniques include 1) iterative linear regression, 2) Levenberg-Marquardt... 

Three kinetic models were tested the Chen-Nuttall model ( 5) and the Coats-Redfern model (6) both assume a single first order rate equation to describe the decomposition reaction and the Anthony-Howard model (7) (as developed for coal decomposition studies), which assumes multiple parallel first order reactions to describe the decomposition reaction. 

Chen and Nuttall Equation. Chen and Nuttall (5), developed an approximation of Eq. (6) which gives ... 

TABLE VI. Comparison of the Kinetic Parameters and AAD Values Determined from Chen-Nuttall and Coats-Redfern Equations ... 

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