Resumen:
In this work, an experimental study of the deactivation and regarding a possible regeneration procedure
in the ETP-reaction using Ni/AlMCM-41 (Si/Al = 60) was carried out. ETP experiments at different temperatures
and long time on-stream were carried out. Characterization of the catalyst after experiments was
performed using powder-XRD, N2-physisorption, NH3-TPD, TPO and TEM. At 250 and 350 ◦C the catalyst
did not suffer significant deactivation after 107 h on-stream. Nevertheless, the yield of propene was low. A
severe deactivation of the catalyst was observed at 450 ◦C where propene was the main reaction product.
Regeneration of the catalyst after 30 h on-stream at temperatures lower than 350 ◦C could be performed
using a mixture of 5 vol.% oxygen in N2. The regeneration of the catalyst was not possible after 30 h
on-stream at 450 ◦C. Filamentous carbon and Ni reduction are considered responsible of the deactivation
of the catalyst at 450 ◦C. The analysis of the obtained results suggests that a conjunct polymerization
process takes place and is the precursor of the reaction products and the carbon species. However, a
detailed study of the mechanism of the ETP-reaction should be done for a better understanding of the
deactivation of Ni/AlMCM-41.