Kinetics of formation of HCN during pyridine pyrolysis

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Abstract
The rate of HCN evolution during the inert pyrolysis of pyridine in the temperature range of 900–1000°C was determined in a flow system using a stirred‐flow reactor. The data indicated that HCN was formed through a sequence of reactions rather than during the initial step(s) involving the disappearance of pyridine. The Arrhenius parameters for the first‐order step yielding HCN were 39.5 kcal/mol and 6.8 for the activation energy and log frequency factor, respectively. The mechanistic implications of the rate data are discussed, and these are related to the overall pyridine pyrolysis mechanism.