Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (03): 223-229.doi: 10.3866/PKU.WHXB19940307

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Reaction Kinetics and Mechanism of the Pyrolysis of Isobutane at High Temperature

Ying Li-Ming, Han De-Gang, Yang Hui-Xing   

  1. Department of Chemistry, Peking University, Beijing 100871
  • Received:1992-09-08 Revised:1993-02-04 Published:1994-03-15
  • Contact: Ying Li-Ming


The pyrolysis reaction signals of isobutane at high temperature have been measured by the shock-tube laser-schlirene technique. The fall-offe of some essential uni molecular reactions occuring in the pyrolysis process have been calculated theoretically. A mechanism including fifty elementary reactions has been established and simulated by computer. Rate constant of the initial reaction i-C_4H_(10)→CH_3+i-C_3H_7 obtained at temperature of 1500—1800 K and pressure of 1.00 ×10~4-2.00×10~4 Pa was k_1=6.22×10~(11) exp (-457000/RT)±50%(s~(-1)). The result was well accordant with the theoretical fall-off calculation.

Key words: Pyrolysis, Reaction kinetics, Reaction mechanism, Shock wave