Catalytic pyrolysis of HC1O4 and its relation to the decomposition and combustion of NH4ClO4

F. Solymosi, L. Gera, S. Börcsök

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The vapor-phase decomposition of perchloric, acid has been investigated for all the oxides previously studied in connection with the decomposition and combustion of ammonium perchlorate (AP). The experiments were carried out in a flow system, using N2 as carrier gas. The interaction between the catalysts and the substratum was studied by electric-conductivity measurements, infrared spectroscopy, chemical and thermal analysis. The oxides catalyze the composition of perchloric acid in the temperature range between 130°-400°C, depending on the metal ion. For 0.5% to 8% conversion per minute, the catalytic decomposition followed first-order kinetics. An exception was chromium oxide, for which the reaction was found to be of zero order. The activation energies determined for the different catalysts ranged from 20 to 45 kcal/mode. A close relation had been observed between the catalytic effect of the metal oxides on the decomposition of HClO4 and the thermal stabilities of the corresponding perchlorates, namely, that the most active oxides gave the most unstable perchlorates. An attempt was made to compare the catalytic effect of the oxides on the decomposition of perchloric acid and on that of ammonium perchlorate. Using the same catalyst in both cases, it was concluded that there is no direct correlation between the relative activity of the oxides in the two reactions.

Original languageEnglish
Pages (from-to)1009-1017
Number of pages9
JournalSymposium (International) on Combustion
Volume13
Issue number1
DOIs
Publication statusPublished - 1971

Fingerprint

Oxides
pyrolysis
Pyrolysis
perchloric acid
Decomposition
decomposition
oxides
Perchlorates
ammonium perchlorates
perchlorates
catalysts
Catalysts
Electric conductivity measurement
chromium oxides
Acids
chemical analysis
metal oxides
metal ions
Chemical analysis
thermal analysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Mechanical Engineering

Cite this

Catalytic pyrolysis of HC1O4 and its relation to the decomposition and combustion of NH4ClO4 . / Solymosi, F.; Gera, L.; Börcsök, S.

In: Symposium (International) on Combustion, Vol. 13, No. 1, 1971, p. 1009-1017.

Research output: Contribution to journalArticle

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