Hydrogen production from methane autothermal reforming over CaTiO3, BaTiO3 and SrTiO3 supported nickel catalysts. (9th July 2021)

• Record Type: Journal Article
• Authors: Araújo, Pedro M.; da Costa, Kevin M.; Passos, Fabio B.
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 47(2021)
• Page Start: 24107
• Page End: 24116
• Publication Date: 2021-07-09
• Subjects: Hydrogen -- Nickel -- Perovskite -- Autothermal reforming -- Methane; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.04.202
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Nickel supported on perovskite supports were investigated in the autothermal reforming of methane. The catalysts were prepared by incipient wetness impregnation and characterized by energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), N2 physisorption, H2 temperature programmed reduction (H2 -TPR), H2 chemisorption, dehydrogenation of cyclohexane model reaction and Raman spectroscopy. The alumina supported catalyst exhibited highest initial conversion and selectivity to H2, however it deactivated. All catalysts with perovskite support were very stable, with Ni/CaTiO3 and Ni/BaTiO3 converting over 70% of the methane. Due to carbon formation, Ni/SrTiO3 conversion was only 50%. Turnover frequency was higher on perovskite supported catalysts. Deactivated Ni/Al2 O3 favored total oxidation of methane instead of methane reforming, however the selectivity of catalysts supported on perovskites remained stable. Graphical abstract: Image 1 Highlights: Autothermal reforming of methane using perovskite supported nickel catalysts. BaTiO3 and CaTiO3 supports improved conversion and yield after 24 h on stream. Unlike Ni/Al2 O3, all perovskite supported nickel catalysts were stable. Perovskite supported catalysts exhibited higher turnover frequency than Ni/Al2 O3 .