Objective: Infering and validating the pyrolysis reaction mechanism of fried charcoal about Rhei Radix et Rhizoma

Sanguisorbae Radix and Moutan Cortex

and further improve theory of fried charcoal of the shamisen traditional Chinese medicines(TCMs). Method: The pyrolysis reaction mechanism of fried charcoal about Rhei Radix et Rhizoma

Sanguisorbae Radix and Moutan Cortex was infered with indefinite temperature method of single scan rate(Coats-Redfern model and Achar model) that belonged to mode-fitting method.The pyrolysis reaction mechanism was validated by comparing thermal analysis curves about the theoretical value

experimental value of conversion rate(α) and 1/T. Result: The pyrolysis mechanism functions of fried charcoal about the shamisen TCMs were as follows: No. 9 mechanism function in integral form of g(α)=[(1-α)-1/3-1]2 for Rhei Radix et Rhizoma and Moutan Cortex

and No. 2 mechanism function in integral form of g(α)=α+(1-α)ln(1-α) for Sanguisorbae Radix. Conclusion: Pyrolysis reaction mechanism of fried charcoal about the shamisen TCMs all belong to reaction diffusion

there are a certain differences between the theoretical value and the experimental value of α.