Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (06): 730-734.doi: 10.3866/PKU.WHXB19910619

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A New Method for Determination of Reaction Order by Derivative Thermogravimetry

Xu Jie; Du Bao-Shi; Wang Wen-Xiang   

  1. Department of Chemistry, Zhengzhou University, Zhengzhou 450052
  • Received:1990-04-22 Revised:1991-03-07 Published:1991-12-15
  • Contact: Xu Jie

Abstract: A new method for determination of reaction order n by DTG curve is presented in this paper. The reliability of the method is illustrated by the investigation of the decomposition process of CaC_2O_4·H_2O.
The result shows that the peak area of DTG Curve corresponds to the change of sample weight. The reaction order n may be determined by the following equation:
1-x_m=1/e (n=1); 1-x_m=n~(1/(1-n)) (n≠1)
Where x_m represents the fraction reacted at maximum rate of the reaction, x_m can be calculated by the ratio of sample changed at the top of DTG peak ...

Key words: Determination of reaction order, DTG curve