In this work, an experimental study of the deactivation and regarding a possible regeneration procedure in the ETP-reaction using Ni/AIMCM-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, N-2-physisorption, NH3-TPD, TPO and TEM. At 250 and 350 degrees 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 degrees C where propene was the main reaction product. Regeneration of the catalyst after 30 h on-stream at temperatures lower than 350 degrees C could be performed using a mixture of 5 vol.% oxygen in N-2. The regeneration of the catalyst was not possible after 30h on-stream at 450 degrees C. Filamentous carbon and Ni reduction are considered responsible of the deactivation of the catalyst at 450 degrees 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/AIMCM-41. (C) 2017 Elsevier B.V. All rights reserved.