Journal Article

PUBDB-2025-05584

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Role of Mg:Al ratio and Pt promotion on mitigating the deactivation of Ni-based methane steam reforming catalysts

De Giacinto, A.Extern* ; Tusini, E.Extern* ; Doronkin, D. E.Extern* ; Reguer, S. ; Popescu, R. ; Grunwaldt, J.-D.Extern* ; Casapu, M. (Corresponding author)Extern*

2025
Elsevier Amsterdam

This record in other databases:    

Please use a persistent id in citations: doi:10.1016/j.apcatb.2025.126305  doi:10.3204/PUBDB-2025-05584

Abstract: Ni-based catalysts for CH₄ steam reforming require fine tuning to withstand deactivation under dynamic operation conditions relevant to emerging H₂-driven technologies. This study investigates the impact of Mg:Al ratio and Pt presence in catalyst composition on the activity and stability of industrially relevant Ni-based mono- and bimetallic catalysts during simulated daily start-up and shut-down cycles in various gas atmospheres. The evolution of the catalyst structure during extensive testing procedures was investigated in detail by complementary electron microscopy, in situ/operando XAS and XRD. The results obtained revealed that the catalyst deactivation is promoted at high Mg:Al ratios and especially affects the monometallic catalysts. By converting CH₄ at lower temperatures, Pt regulates Ni oxidation extent and its incorporation into MgO lattice. Further prevention of catalyst deactivation was achieved by optimizing the reactor shut-down procedure to minimize its simultaneous exposure to high temperatures and H₂O vapors. By flushing the reactor with N₂ only around the reaction extinction temperature, a fraction of Ni species is maintained in metallic state, which is beneficial for the long-term activity and reaction operation economy.

---

Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: II-20230692 (II-20230692) (II-20230692)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2025

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 20 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---