THERMAL-EQUILIBRIUM BETWEEN VANADYLOCTAETHYLPORPHYRIN AND HYDROGENATED PORPHYRIN DURING THE HYDRODEMETALATION PROCESS

Hydrogenation of the vanadyloctaethylporphyrin VO(OEP), is a reversible reaction which may occur without a catalyst. The thermodynamic data have been deduced from experiments performed in a batch reactor. Both DELTA-H-degrees and DELTA-S-degrees are positive; this can be explained by the aromatic character of chlorin, the reaction product. From a kinetic point of view, the rate order relative to H-2 is equal to one.