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Title: Experimental study of the deactivation of Ni/AlMCM-41 catalyst in the direct conversion of ethene to propene
Authors: Alvarado Perea, Leo
Wolff, Tanya
Hamel, Christof
Seidel-Morgenstern, Andreas
Issue Date: 31-Dec-2016
Publisher: Elsevier
Abstract: 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.
ISSN: 0926-860X
Other Identifiers: info:eu-repo/semantics/publishedVersion
Appears in Collections:*Documentos Académicos*-- M. en Ciencias de la Ing.

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