Preparation and characterization of mesoporous nanocrystalline La-, Ce-, Zr-, Sr-containing NiAl2O3 methane autothermal reforming catalysts. (8th June 2016)

• Record Type: Journal Article
• Authors: Sepehri, Soodeh; Rezaei, Mehran; Garbarino, Gabriella; Busca, Guido
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 21(2016)
• Page Start: 8855
• Page End: 8862
• Publication Date: 2016-06-08
• Subjects: Autothermal reforming (ATR) -- Ni based catalyst -- Solid state reaction -- Promoters; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.03.139
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The promotion effect of La, Ce, Sr and Zr on the catalytic and structural properties of nanocrystalline mesoporous γ-Al2 O3 supported Ni catalysts was investigated in autothermal reforming of methane. Mesoporous nanocrystalline γ-Al2 O3 powder and promoted ones with high specific surface area (>220 m 2 /g) were prepared by solid state reaction method and employed as the support for nickel catalysts. The prepared catalysts were subjected to autothermal reforming reaction and characterized by XRD, BET, DR-UV-Vis, TPR, TPO and SEM techniques before and/or after the reaction. The effect of experimental conditions, such as temperature was investigated on the catalysts. Ce promoted catalyst, containing small amounts of CeO2 as a separate phase, was found the most effective catalyst between both promoted and unpromoted ones. Highlights: Preparation of mesoporous nanocrystalline La, Ce, Sr and Zr doped γ-Al2 O3 powders. The novel and simple solid state method was employed for preparation of powders. The promoted Ni catalysts has high potential in autothermal reforming. The catalysts exhibited high resistance against carbon formation. Ce-promoted catalyst exhibited the highest activity among the prepared catalysts.