Nickel-based catalysts: Dependence of properties on nickel loading and modification with palladium

The aim of this study was comparative analysis of catalysts with 5 and 20 wt. % Ni loading, with and without Pd additive, and it included: determination of reduction degrees, investigation on microstructure by scanning electron microscopy and chemical analysis by energy-dispersive spectroscopy. Ni/A...

Full description

Saved in:
Bibliographic Details
Published in:Hemijska industrija 2016, Vol.70 (2), p.137-142
Main Authors: Nikolic, Vesna, Kamberovic, Zeljko, Korac, Marija, Andjic, Zoran, Mihajlovic, Aleksandar, Uljarevic, Jelena
Format: Article
Language:English
Subjects:
aerosol assisted impregnation
Aluminum oxide
Catalysts
Chemical analysis
Chemical synthesis
Foams
Hydrogen reduction
Impregnation
Metallurgy
modification
Nickel
Palladium
Scanning electron microscopy
α-Al2O3-based foam
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The aim of this study was comparative analysis of catalysts with 5 and 20 wt. % Ni loading, with and without Pd additive, and it included: determination of reduction degrees, investigation on microstructure by scanning electron microscopy and chemical analysis by energy-dispersive spectroscopy. Ni/Al2O3 and Ni-Pd/Al2O3 catalysts supported on ?-Al2O3-based foams were synthesized by aerosol assisted impregnation. Impregnation of the foams by ultrasonically aerosolized chlorides was followed by drying at 473 K and hydrogen reduction at 533 and 633 K. Lower Ni loading resulted in higher reduction degrees. Ni loading of 20 wt. % enabled relatively uniform coverage of the foam with a metallic coating. With activity modifier (Pd), nearly complete reduction was achieved at both temperatures. Reduction degrees reached 99.4 and 98.2 wt. % at 533 K for 5 and 20 wt. % of Ni, respectively.
ISSN:0367-598X
2217-7426
DOI:10.2298/HEMIND140928090N