Abstract
The kinetic study of the ammoxidation of methylpyrazine to cyanopyrazine was carried out at 583–643 K and atmospheric pressure, in excess steam. Apparent partial reaction orders were −0.4, 0.7, 0.02 and 0.2, with respect to methylpyrazine, oxygen, ammonia and water, respectively. A pseudo-first order model fitted experimental data satisfactorily. However, low values (50 kJ/mol or less) of the apparent activation energy indicate that the kinetics are probably controlled by internal diffusion.
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