M. Di Serio et al., Kinetic and mass transfer in the hydrogenation of polyunsaturated organic compounds in the presence of supported Pd catalysts, CATAL TODAY, 66(2-4), 2001, pp. 403-410
The hydrogenation of 1,5-cyclo-octadiene has been studied on well-defined P
d catalysts. The reaction is affected by internal diffusion of hydrogen int
o the catalyst particles. Despite this limitation, the reaction orders of t
he reactants have been determined. All the performed kinetic runs have been
simulated and the kinetic and mass-transfer parameters giving the best fit
of experimental data have been evaluated. The reaction occurs in two steps
, in the first, a conjugate diene (1,3-cyclo-octene) is formed via isomeriz
ation, then, hydrogenation occurs quickly forming the monoene. The hydrogen
ation of the obtained cyclo-octene is relatively slow and strongly inhibite
d by the presence of the cyclo-octadiene. This last reaction has, therefore
, been used for comparing the activities of different palladium catalysts s
howing an exponential behaviour of the reaction rate with the metal dispers
ion. (C) 2001 Elsevier Science B.V. All rights reserved.