Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (01): 123-127.doi: 10.3866/PKU.WHXB19920122

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Investigation of the Kinetics and Mechanism of Decomposition of Ammonium Hydrogen Sulfate

Li Jing-Hua; Zhang Gui-En   

  1. Department of Chemistry Henan Normal University, Xinxiang 453002
  • Received:1990-08-15 Revised:1991-02-26 Published:1992-02-15
  • Contact: Li Jing-Hua

Abstract: The thermal decomposition of NH_4HSO_4 was studied by means of thermogravi-metry both at cosntant temperature and linearly increasing of temperature. Three-stage identification of the function depending on a mechanism was suggested. The experi-mental results and theoretical analysis showed that the thermal decomposition of NH_4HSO_4 is an one dimensional phase boundary reaction.
Kinetic paramters:
E=141.25 kJ·mol~(-1), A=1.563×10~(10) min~(-1) (isothermal run)
E=131.83 kJ·mol~(-1), A=3.3113×10~9 min~(-1)(dynamic run)
Kinetic compensition effect:
lgA=0.0899E-2.5143

Key words: Ammonium hydrogen sulfate, Kinetics, Thermogravimetry