Dehydration mechanisms in the thermal decomposition of gaseous formic acid
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society B: Physical Organic
- p. 1923-1925
- https://doi.org/10.1039/j29710001923
Abstract
The homogeneous thermal decomposition of formic acid has been studied in flow and static systems between 457 and 780°C. Dehydration is of the second order below 600°C, k= 108·44 exp(–132,500/RT) l mol–1 s–1, but the Arrhenius plot then becomes curved, straightening out again above 670°C to give k= 1012·39 exp(–253,000/RT) s–1. The order in this region is 1·5 and dehydration here appears to be a unimolecular reaction in the fall-off region. Decarboxylation is of the first order throughout the temperature range, with k= 109·47 exp(–203,000/RT) s–1.Keywords
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