✦ LIBER ✦

Kinetics and mechanism of the thermal decomposition of methyl isocyanate

✍ Scribed by P. G. Blake; S. Ijadi-Maghsoodi

Publisher: John Wiley and Sons
Year: 1982
Tongue: English
Weight: 328 KB
Volume: 14
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550140813

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✦ Synopsis

Abstract

The kinetics of gas‐phase decomposition of methyl isocyanate have been investigated in the range of 427–548°C. Two decomposition routes are followed; the predominant one is a radical‐chain process giving CO, H~2~, and HCN as major products, which has an order of 1.5 and an Arrhenius equation given by log k(L^1/2^/mol^1/2^·s) = (13.12 ± 0.06) − (56,450 ± 1670) cal/mol/2.303 RT. The minor route is the bimolecular formation of N,N′‐dimethylcarbodiimide and CO~2~, which from the low activation parameters E~a~ = 31.6 kcal, A = 10^5.30^ L^1/2^/mol^1/2^·s, and the reaction order of 1.57 appears to be heterogeneous.

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